CBSE > Class 10 > Science | CBSE Board | Homework Help

Mercier was a novelist in the 18th century.
He declared that “the printing press is the most powerful engine of progress and public opinion is the force that will sweep despotism away.”
In many of Mercier’s novels, the heroes are transformed by the acts of reading.
Mercier believed that power of print will bring down despotism.

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Why do metals behave as reducing agents?????

Posted by Ishika ? 5 years, 5 months ago

CBSE > Class 10 > Science

5 answers

Ishika ? 5 years, 5 months ago

Yes ofcoure i remember u very well☺️☺️☺️

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Lucifer ? Morningstar? 5 years, 5 months ago

Ishika u remember me

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Ishika ? 5 years, 5 months ago

U remember me...

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Drift? Boi? 5 years, 5 months ago

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Meghna Thapar 5 years, 5 months ago

Generally metals acts as reducing agents. Because metals easily release electrons from their outermost shell to obtain stable octet configuration.
For example sodium metal atomic number is 11 its electronic configuration is 2,8,1.
To obtain octet configuration or noble gas configuration it easily releases one electron from its outer most shell. Apart from this metals has low ionization potentials ,low energy is required to remove electrons from their valence shell.

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ANSWER

Respiration in roots

Posted by Raushan Rana 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Pratham Shah 5 years, 5 months ago

Roots of the plant take oxygen from the air that is present in-between the particles of soil.Oxygen diffuses in root hair and reaches all the other cells of the roots. It is through root hairs that only carbon dioxide gets diffused into them and is expelled from the roots of a plant.

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PleasE help

Posted by Bilquees Ahmed 5 years, 5 months ago

CBSE > Class 10 > Science

3 answers

~Rashi ♥️♥️ 5 years, 5 months ago

Perfect reply ??

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? Pranali.A.P ? 5 years, 5 months ago

Nice reply ??

1Thank You

Study ? 5 years, 5 months ago

Dont ask silly questions here

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ANSWER

What is ph of a solution?

Posted by Bilquees Ahmed 5 years, 5 months ago

CBSE > Class 10 > Science

4 answers

Pratham Shah 5 years, 5 months ago

In chemistry, pH is a scale used to specify how acidic or basic a water-based solution is. Acidic solutions have a lower pH, while basic solutions have a higher pH.

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Sumit Haldani 5 years, 5 months ago

I don't know

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Yogita Ingle 5 years, 5 months ago

A scale developed to measure the concentration of hydrogen ion in a solution is known as pH scale where p in pH implies ‘potenz’ in German.
pH scale ranges from 0 (highly acidic) – 14 (highly alkaline).
The pH of a neutral solution is 7.
Acidic solution is represented by a value less than 7 on the pH scale.
Whereas basic solution is represented by a value greater than 7 on the pH scale.

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Kamal Kuwala 5 years, 5 months ago

ph is the value

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ANSWER

Aqueous solution of cso2

Posted by Unique #Seraj Ali ??? 5 years, 5 months ago

CBSE > Class 10 > Science

2 answers

Sanket Arjun 5 years, 5 months ago

Aqueous solution of cuso4 is acidic in nature.because it formed by strong acid H2SO4 and weak base Cu(OH)2

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Unique #Seraj Ali ??? 5 years, 5 months ago

Gm all of you

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Why do we prevent from sleep under tree at night??

Posted by Sanket Arjun 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

Vaibhav (Silent Love)?? Avi 270505??? 5 years, 5 months ago

???

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Unique #Seraj Ali ??? 5 years, 5 months ago

Kyunki raat mai chudel pakar leti hai

5Thank You

Saurav Raj Yadav 5 years, 5 months ago

Because at night their is no sunlight sothat tree cannot do photosynthsesis.due to this they realsea only carbon dioxide at night ant that lead to difficult in breathing at night as we under the tree.

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Vijaypal Baloda 5 years, 5 months ago

Because in day trees release oxygen and take co2 and in night trees take oxygen and release co2 so it is harmful for all human beings that they didnot get proper o2 under the tree

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Rayyan Faizal 5 years, 6 months ago

That is, the plants leave carbon dioxide at night. On the basis of this it is that in the night if you sleep under the tree, you will not get oxygen, which can cause breathing problem, suffocation etc. Therefore, Trees are very important for us. They keep the environment pure by helping us in reducing air pollution.

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ANSWER

What si the correct sequence of reflex(hiii?)

Posted by Unique #Seraj Ali ??? 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

~Rashi ♥️♥️ 5 years, 6 months ago

Yss i m new here but how would u know that nd ya whats ur name tell me pls

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Unique #Seraj Ali ??? 5 years, 6 months ago

Yes you are new here

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~Rashi ♥️♥️ 5 years, 6 months ago

HOPE it help u

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~Rashi ♥️♥️ 5 years, 6 months ago

Sensor....to .....sensory neuron....control centre....Motor neuron.....Muscle

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Unique #Seraj Ali ??? 5 years, 6 months ago

It's is

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ANSWER

Define nomenclature of an organism

Posted by Lucifer?? Morningstar?? 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

~Rashi ♥️♥️ 5 years, 5 months ago

Nd he told me many things about u nd that girl........

2Thank You

~Rashi ♥️♥️ 5 years, 5 months ago

He told me that u nd a girl r lovers on this app .......aur bhi bahut kuch kha tha..........

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Lucifer?? Morningstar?? 5 years, 5 months ago

Tell me ,what did u hear about me?

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~Rashi ♥️♥️ 5 years, 6 months ago

Not sure about answer

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~Rashi ♥️♥️ 5 years, 6 months ago

Naming of organisms nd their name should consist of 2 words 1 word represent the genus and the 2nd word represent the species

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Definition of taxonomy.

Posted by Lucifer?? Morningstar?? 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

~Rashi ♥️♥️ 5 years, 5 months ago

The one who has reccomended me this app has told me that.......

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Lucifer?? Morningstar?? 5 years, 5 months ago

What tell me

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~Rashi ♥️♥️ 5 years, 5 months ago

Hey someone has said me something about u

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Lucifer?? Morningstar?? 5 years, 6 months ago

Hello

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~Rashi ♥️♥️ 5 years, 6 months ago

(Hiiiii) taxonomy is the science that deals with the naming , describing and classifying the organisms even plants ...........characterization, identification nd classification are the processes of taxonomy.....Organisms r classified into similar categories namely kingdom ,phylm class ,order ,family ,genus ,species ( hope it help u)

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What is mean by artificial kidney ?

Posted by ? Pranali.A.P ? 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

? Pranali.A.P ? 5 years, 6 months ago

Hii rashi?

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~Rashi ♥️♥️ 5 years, 6 months ago

Hiii pranali ur wlcm ??

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? Pranali.A.P ? 5 years, 6 months ago

Thanks ? both of u

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~Rashi ♥️♥️ 5 years, 6 months ago

Hemodylasis is a method of removing waste products like ureand creatinine as well as free water from yhe blood at the time of kidney failure . The mechanism device used to claen the patients blood is known as dialyser or we can say artificial kidney . (HOPE IT HELP U)

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Lucifer?? Morningstar?? 5 years, 6 months ago

The mechanical device used to clean the patients blood is called a dialyser, also known as an artificial kidney.

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ANSWER

Sodium+water = sodium hydroxide+hydrogen

Posted by Adarsh Mishra 5 years, 6 months ago

CBSE > Class 10 > Science

4 answers

Akangsha Das 5 years, 5 months ago

@Lovekush yadav it is asked hydrogen not water .. please rectify it.

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? Pranali.A.P ? 5 years, 6 months ago

The balanced Chemical Equation is 2Na+2H2O→2NaOH+H2.

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Lucifer?? Morningstar?? 5 years, 6 months ago

2Na+2H2O ----------> 2NaOH +H2

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Santosh Yadav 5 years, 6 months ago

2Na+2H2O----2NaOH+H2O

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ANSWER

One animal and one plant name whose stings contain formic acid ( or methanoic acid)???????

Posted by ~Rashi ♥️♥️ 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

~Rashi ♥️♥️ 5 years, 6 months ago

Thanks to all ??

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Minta Yadav 5 years, 6 months ago

Bee and nettle

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~Rashi ♥️♥️ 5 years, 6 months ago

Is nettle a plant?????

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Santosh Yadav 5 years, 6 months ago

Both.....

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Lucifer?? Morningstar?? 5 years, 6 months ago

Ant and nettle

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Sodium+water = sodium hydroxide hydrogen

Posted by Adarsh Mishra 5 years, 6 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

What is the common name of the compound CaOCl2??

Posted by ? Pranali.A.P ? 5 years, 6 months ago

CBSE > Class 10 > Science

4 answers

~Rashi ♥️♥️ 5 years, 6 months ago

Its calcium hypochlorite or bleaching powder..........

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Santosh Yadav 5 years, 6 months ago

Calcium hypochloride or Bleaching powder....

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Lucifer?? Morningstar?? 5 years, 6 months ago

Bleaching Powder

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Lucifer?? Morningstar?? 5 years, 6 months ago

Calcium oxychloride

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What is the difference between bile juice and bile salt???????

Posted by ~Rashi ♥️♥️ 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

Vaibhav (Silent Love)?? Avi 270505??? 5 years, 5 months ago

Hi Rashi

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~Rashi ♥️♥️ 5 years, 6 months ago

Thanks vaibhav can u pls tell me that the friendship is a discovery or invention ??

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Vaibhav (Silent Love)?? Avi 270505??? 5 years, 6 months ago

Bile is a digestive juice secreted by the liver. Although it does not contain any digestive enzymes, it plays an important role in the digestion of fats. Bile juice has bile salts such as bilirubin and biliverdin. ... Bile juice also makes the medium alkaline and activates lipase.

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~Rashi ♥️♥️ 5 years, 6 months ago

Thanks sanket

1Thank You

Lucifer?? Morningstar?? 5 years, 6 months ago

The bile salt is secreted by the liver to the small intestine and breaks down the large globules of fat into smaller globules and increases the efficiency of enzymes to act upon it..... Bile juice helps the body to absorb the breakdown products of fat in the gut.

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ANSWER

Haw are fats digested in our body ?

Posted by ? Pranali.A.P ? 5 years, 6 months ago

CBSE > Class 10 > Science

4 answers

Vaibhav (Silent Love)?? Avi 270505??? 5 years, 5 months ago

Hi pranali

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Lucifer?? Morningstar?? 5 years, 6 months ago

With the help of bile juice and lipase

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~Rashi ♥️♥️ 5 years, 6 months ago

Hiiii pranali

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~Rashi ♥️♥️ 5 years, 6 months ago

( Hiii ) the small intestine receives the secretions from pancress and liver. The bile salt from the liver break down the large fat globules into small globules so that the pancreatic juice Lipase can easily act on them after that lipase convert the fat into fatty acid and glycerol . (HOPE IT HELP U)

1Thank You

ANSWER

Explain briefly the process of respiration in human beings.

Posted by Athulyashibu Ps 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

? Pranali.A.P ? 5 years, 6 months ago

Respiration is the process by which energy is released from food in our body. The function of respiratory system is to breathe in oxygen for respiration producing energy from food, and to breathe out carbon dioxide. With the help of lungs gases are exchanged between the blood and the air. Gases exchanged are oxygen and carbon dioxide. We can live without food and water for many days but we cannot live for more than a few minutes without air, as it is necessary for breathing. So, before discussing the human respiratory system, it is necessary to know the process of breathing which is an important part of respiration

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What is the role of saliva in the digestion of food ???

Posted by ? Pranali.A.P ? 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

Vaibhav (Silent Love)?? Avi 270505??? 5 years, 6 months ago

Welcome pranali

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Gaurav Seth 5 years, 6 months ago

Saliva is a fluid which is secreted by the salivary glands. It helps in digestion of food by following Ways.

Saliva contains a digestive enzyme called salivary amylase, which converts carbohydrates in to maltose sugars.
It cleans the mouth cavity and tends to destroy germs that cause teeth decay. It contains lysozomes which help in destroying the bacteria.
It moistens and lubricates food which again helps in swallowing.
It acts as solvent, dissolving some food particles to stimulate taste buds of the tongue.

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? Pranali.A.P ? 5 years, 6 months ago

Thank u ? vaibhav

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Vaibhav (Silent Love)?? Avi 270505??? 5 years, 6 months ago

the meaning of guys is used when speaking to a group of men and women

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Vaibhav (Silent Love)?? Avi 270505??? 5 years, 6 months ago

The digestive functions of saliva include moistening food, and helping to create a food bolus, so it can be swallowed easily. Saliva contains the enzyme amylase that breaks some starches down into maltose and dextrin. Thus, digestion of food occurs within the mouth, even before food reaches the stomach

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ANSWER

Define drift speed.

Posted by Lucifer?? Morningstar?? 5 years, 6 months ago

CBSE > Class 10 > Science

4 answers

Lucifer?? Morningstar?? 5 years, 6 months ago

Thanks both of u

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Gaurav Seth 5 years, 6 months ago

When a uniform conductor (resistor) of length L is connected to a battery (voltage V) and is given a potential difference across its ends, there is an electric (electrostatic) field E created through the conductor. Then E = V / L.

Due to this potential gradient and field intensity, the charged particles - free electrons (in the conductor) ie., from the conduction band in the atoms - free themselves from atoms and start travelling towards the positive terminal of the battery. Electrons have a charge equal to e. they have a mass = m.

The electrons accelerate with acceleration a = e E / m, due to the force = e E on them. Due to collisions of electrons with one another , they lose a lot of momentum and energy (to heat) in each collision. But again they accelerate. They attain a net uniform and steady speed along the length of the conductor from negative terminal towards the positive terminal of the battery. This steady speed is called drift speed.

Thus, the movement of particles which move slowly along the medium, under the influence of a field and force is called drift. The speed is called drift speed.

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? Pranali.A.P ? 5 years, 6 months ago

I am not Shure

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? Pranali.A.P ? 5 years, 6 months ago

Drift Speed: Free electrons moving in a conductor make many collisions with other electrons and atoms. The path of one electron is shown. The average velocity of the free charges is called the drift velocity and is in the direction opposite to the electric field for electrons

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ANSWER

Law of refraction..??

Posted by Lucifer?? Morningstar?? 5 years, 6 months ago

CBSE > Class 10 > Science

4 answers

Lucifer?? Morningstar?? 5 years, 6 months ago

Thanks

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~Rashi ♥️♥️ 5 years, 6 months ago

This law is also known as snell's law nd according to this law :- 1. The normal ray incident ray nd the refracted ray all lie in the same plane. 2. The ratio of sine of angle of incidence to the sine of angle of refraction is a constant. And this constant is known as refractive index (HOPE IT HELP U)

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Gaurav Seth 5 years, 6 months ago

(i) The incident ray, the refracted ray, and the normal at the point of incidence all lie in the same plane.
(ii) The ratio of the sine of angle of incidence to the sine of the angle of refraction is a constant and this constant is called the index of refraction or refractive index.

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~Rashi ♥️♥️ 5 years, 6 months ago

(hiiii) leave it i don't want to ask you anything now!!!!!

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ANSWER

Why does air flow ?

Posted by Khushboo Tiwari 5 years, 6 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 6 months ago

The movement of air across the earth determines the weather and climate of all regions. The sun’s radiation heats up the land, sea and the air. The land and water bodies also heat up the air, making it less dense. Here, hot air increases and creates a low pressure over that area and cold air sinks and creates a region of high pressure. Air, like all fluids, likes to maintain equal pressure. To do so, cold air from high-pressure areas flows into regions of lower pressure.

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? Pranali.A.P ? 5 years, 6 months ago

The primary cause of airflow is the existence of air. Air behaves in a fluid manner, meaning particles naturally flow from areas of higher pressure to those where the pressure is lower. Atmospheric air pressure is directly related to altitude, temperature, and composition.

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ANSWER

Why does water get fire ? Water have oxygen and fire want oxygen to burn ?

Posted by Khushboo Tiwari 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Gourav Dhillon 5 years, 5 months ago

Because it contains more hydrogen and hydrogen can help to stop fire

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ANSWER

What is intestinal villi(villies)???

Posted by ~Rashi ♥️♥️ 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

~Rashi ♥️♥️ 5 years, 6 months ago

Thanks haripriya

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~Rashi ♥️♥️ 5 years, 6 months ago

Yss u r right vaibhav

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Nithyashree A 5 years, 6 months ago

They are tiny finger-like prohections in the inner lining of the small intestine . They are also the site for rapid absorption of digested food which is transported in all the parts of the body with the help of blood

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Vaibhav (Silent Love)?? Avi 270505??? 5 years, 6 months ago

Am I right sana

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Vaibhav (Silent Love)?? Avi 270505??? 5 years, 6 months ago

intestinal villi (in-TES-tih-nul VIH-ly) Tiny hair-like projections that line the inside of the small intestine. They contain blood vessels and help absorb nutrients.

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ANSWER

What is mucus???

Posted by ~Rashi ♥️♥️ 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

Vaibhav (Silent Love)?? Avi 270505??? 5 years, 6 months ago

Your welcome Rashi

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? Pranali.A.P ? 5 years, 6 months ago

Can anybody tell me what is mean by Guys .

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~Rashi ♥️♥️ 5 years, 6 months ago

Thanks!!!!! guys ??

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Gajavelli Swathi 5 years, 6 months ago

This is a gastric gland which is found in stomach. It protects the inner lining of the stomach from the action of hydrochloric acid.

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Vaibhav (Silent Love)?? Avi 270505??? 5 years, 6 months ago

muscus is a slippery aqueous secretion produced by, and covering, mucous membranes. It is typically produced from cells found in mucous glands, although it may also originate from mixed glands, which contain both serous and mucous cells.

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ANSWER

What is magnification ?????

Posted by ? Pranali.A.P ? 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

? Pranali.A.P ? 5 years, 6 months ago

Sorry yr muze maf kr dena ??

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? Pranali.A.P ? 5 years, 6 months ago

Sorry rajwardhan madane vo ghussa aa gya tha muze ?

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? Pranali.A.P ? 5 years, 6 months ago

Nhi aata na to faltu reply bhi mt kiya kro

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? Pranali.A.P ? 5 years, 6 months ago

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Rajwardhan Madane 5 years, 6 months ago

It is the thing which I don't know

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ANSWER

Why in our home circuit is connected always in parallel???

Posted by Lucifer?? Morningstar?? 5 years, 6 months ago

CBSE > Class 10 > Science

3 answers

~Rashi ♥️♥️ 5 years, 6 months ago

1.When the wires r arranged in parallel each of them canbe put on and off independently nd this the feature why parallel combination is uded in home circuit. 2.if one appliance stops working due to the short circuit the other appliances are able to work properly without having any prblm. (HOPE IT HELP U)

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Charnjeet Singhmanhas 5 years, 6 months ago

1 reason is this that if any of the appliance's fails to work then there is ni effect in other appliance's 2 different amount of current is required to operate different appliance's so in parallel circuit it is possible Thus we we parallel circuit in home

1Thank You

Pranav Gahlot 5 years, 6 months ago

So that if short circuit happens in any one of the appliances, then other would continue to work as usual.

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ANSWER

What is salivary amylase ????

Posted by ? Pranali.A.P ? 5 years, 6 months ago

CBSE > Class 10 > Science

5 answers

Gajavelli Swathi 5 years, 6 months ago

It is an enzyme secreted by salivary gland to convert carbohydrate to Glucose.

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Khushboo Tiwari 5 years, 6 months ago

It is a first enzyme ( which boost or fast any type of work ) which secrets from salivary gland and it convert starch to sugar

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Vaibhav (Silent Love)?? Avi 270505??? 5 years, 6 months ago

Salivary amylase is a glucose-polymer cleavage enzyme that is produced by the salivary glands. ... Amylases digest starch into smaller molecules, ultimately yielding maltose, which in turn is cleaved into two glucose molecules by maltase.

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Lucifer ? Morningstar? 5 years, 6 months ago

Salivary amylase is an enzyme present in saliva. It helps to breakdown the big globules of starch into small sugar.

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Lucifer?? Morningstar?? 5 years, 6 months ago

It is an enzyme present in saliva of human.Starch is a large compound that is broken apart into its smaller sugar subunits by salivary amylase.

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ANSWER