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What is heating effect of electric current..??

Posted by Shanvi Choudhary 6 years, 1 month ago

1 answers

Miss. 1234 6 years, 1 month ago

When electric current passes through a high resistance wire, the wire becomes hot and produces heat. This is called heating effect of current.

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ANSWER

What is solenoid .With digram explain

Posted by Krihi Shrimalani 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Miss. 1234 6 years, 1 month ago

Solenoid is a coil of many circular turns of insulated copper wire wrapped closely in a cylindrical form acting as a magnet when current is passed through it.

3Thank You

ANSWER

4 main digestive enzymes in human body with their functions

Posted by Srishti Sharma 6 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Yogita Ingle 6 years, 1 month ago

Digestive enzymes such as amylase, lipase, pepsin, trypsin, etc. helps to break the complex food particles into simple ones so that these simple particles can be easily absorbed by the blood and thus transported to all the cells of the body.

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Siddhant Thakur 6 years, 1 month ago

Hey

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Diksha? 6 years, 1 month ago

?salivary amylase- breaks down complex carbohydrates?pepsin-protein digesting enzyme?trypsin- protein digesting?lipase-fats digesting ?

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ANSWER

Give the chemical test to detect the presence of ethanol and ethanoic

Posted by Pranjal Takkar 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Aadya Singh ? 6 years, 1 month ago

Add sodium hydrogen carbonate to both...The one which gives brisk effervesce due to evolution of carbon dioxide is ethanoic...and in ethanol , there's no effect of NaHCO3..

1Thank You

ANSWER

Why xakw becomes soft and spongy

Posted by Parul Gupta 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 6 years, 1 month ago

Baking powder is mixed with the flour. When water is added to this flour to make dough, baking powder undergoes a chemical reaction during which carbon dioxide gas is produced. This carbon dioxide gas gets trapped into the dough and bubbles out which causes the cake to rise making it soft and spongy.

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Butanone is afour carbon compound with the functional group ???

Posted by Satyam Mishra 6 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Parishi Thada 6 years, 1 month ago

Ketone , general formula - CO. You can guess the presence by suffix 'one'.

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Shreya S❤ 6 years, 1 month ago

Ketone group

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Abhishek Mahar 6 years, 1 month ago

Single bond ane

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What is pH in brief??

Posted by Satyam Mishra 6 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Yogita Ingle 6 years, 1 month 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.
An increase in OH^–ions concentration in the solution results in increase in the strength of alkali hence the value of pH increases.
Acids giving rise to more H⁺ ions are strong acids whereas those giving rise to less H+ ions are termed as weak acids.
Similarly bases giving rise to more OH^- ions are strong bases whereas those giving rise to less OH- ions are termed as weak bases.
Salts of a strong acid and a strong base are neutral with pH value of 7.
Salts of strong acid and weak base are acidic with pH value less than 7.
Salts of a strong base and weak acid are basic in nature, with pH value more than 7.

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Arshia Biswal 6 years, 1 month ago

Power of hydrogen

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Arshia Biswal 6 years, 1 month ago

Power of hydroge

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Define callus .

Posted by Surya Naryana Biswal 6 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Shreya S❤ 6 years, 1 month ago

Group of undifferentiated cells

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Yogita Ingle 6 years, 1 month ago

Callus is a meristemetic cell taken from the shoot tip of a plant in order to grow it through tissue culture. when it is placed in nutritional medium it's body parts are not differentiated like thallophytes that's why it is named callus similar to thallus ( thallophytes ).

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What would happen when water is added to ,1. Ethanoic acid ,2.acetone 3. Chloroform.

Posted by Abhinav Rana 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Manju Devi 6 years, 1 month ago

When water added to 1.ehanoic acid =it completely dissolved in water. 2.acetone(propanone)=it also completely dissolved in water.

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Difference between involuntary and involuntary

Posted by Aditya Sharma 6 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Yogita Ingle 6 years, 1 month ago

Voluntary muscles	Involuntary muscles
They are also called striated muscles since they show stripes or striations	They are also called non-striated muscles since they lack striations.
Their cells are long and cylindrical	Their cells are small and spindle shaped.
They have multinucleate cells	They have uninucleate cells
They are under our will or control.	They are not under our will or control.
They get tired and need rest at intervals.	They do not get tired and can work continuously

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Piyush Kr.?? 6 years, 1 month ago

I think ? there should be voluntary and involuntary in the question...

1Thank You

Abhinav Rana 6 years, 1 month ago

Both are same

1Thank You

ANSWER

Why do aluminium,iron and zinc do not react with water..??

Posted by Shanvi Choudhary 6 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Abhinav Rana 6 years, 1 month ago

Also, these all metals have a thin layer of their oxide . so they cannot react with water.

2Thank You

Abhinav Rana 6 years, 1 month ago

Because they have not high effinity to react with water.also water is neutral compound and movement of the particle of water is medium to compare steam.

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ANSWER

Why do magnesium react with hot water only..?? Can't it react with cold or medium water..??

Posted by Shanvi Choudhary 6 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 6 years, 1 month ago

Magnesium reacts slowly in water but reacts vigorously with steam. The reason why Magnesium doesn't really react with cold water is that it becomes coated with Magnesium hydroxide which is insoluble, so it prevents water coming into contact with Magnesium.

1Thank You

Abhinav Rana 6 years, 1 month ago

No . yes it can react with cold water also but it is very slow process to get Mg(OH)2

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Can anyone please tell me that in cbse class10 any practical ,we have ? And Whether we are going to encounter external examiner from cbse or not??

Posted by Shreya S❤ 6 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Abhinav Rana 6 years, 1 month ago

No , there is only practicle file to be submitted in your school..

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Diksha? 6 years, 1 month ago

Ya please tell....I am also confused...??

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ANSWER

Why does plant take oxygen at night . And if they respire by using oxygen ,then why they release oxygen during day time? Dont they respire during day time?????

Posted by Shreya S❤ 6 years, 1 month ago

CBSE > Class 10 > Science

5 answers

Diksha? 6 years, 1 month ago

Wc?

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Shreya S❤ 6 years, 1 month ago

Thanks?

1Thank You

Diksha? 6 years, 1 month ago

Hope it helps?

0Thank You

Diksha? 6 years, 1 month ago

Plants do respire in the day time,but the energy need ofof plants is very less so they do not need much 02. But in the process of photosynthesis a huge amount of 02 is realeased n some part of it is used by plants for respiration while the rest of 02 is released into the environment. Hence we say that plants release 02 during day time?

0Thank You

Diksha? 6 years, 1 month ago

Plants take oxysen at nyt bcz they do not perform photosynthesis at night. In the absence of photosythesis they do not produce oxygen so they take 02 from the environment?

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ANSWER

What happens to acid or base in water solution

Posted by Yogesh Rai 6 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Yogita Ingle 6 years, 1 month ago

Acids in water solution dissociates H⁺ ions. Let us consider the reaction between water and hydrochloric acid (HCl). HCl in presence of water produces H⁺ ion. This ion cannot exist alone and hence combines with water molecules and forms H₃O⁺. The reaction is as follows:

HCl + H₂O → H₃O⁺ + Cl^-

Base when dissolved in water produces OH^- ion. Let us consider the reaction between water and sodium hydroxide NaOH. NaOH in presence of water produces OH^- ion.

NaOH + H₂O → Na⁺ + OH^- + H₂O

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Piyush Kr.?? 6 years, 1 month ago

Acid gives H+ ion in aqueous solution and base dissolves in water to give OH- ion....

1Thank You

Diksha? 6 years, 1 month ago

They form ions...

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ANSWER

Blanching chemical equations

Posted by asin****@***** 6 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Diksha? 6 years, 1 month ago

You have to make sure that the number of each elements is same in both the reactants n products?

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Raja Joshi 6 years, 1 month ago

Hii

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ANSWER

Define aqueous soln

Posted by Aayushi Thapliyal 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Shreya .... 6 years, 1 month ago

Any solution that contains water as the solvent is referred as aqueous solution.

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ANSWER

How can we call as this CH

Posted by Thinlay Chopel Bhutia 6 years, 1 month ago

CBSE > Class 10 > Science

0 answers

ANSWER

Explain the working function of electric motor

Posted by Deep Tech 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 6 years, 1 month ago

Working

When the current begins to flow, current flows through brush X, then A to B, B to C, C to D and then to brush Y and into the battery.
Now applying Fleming's Left Hand Rule to wire AB, Current is along AB, Magnetic Field is as shown (North-> South), the motion of the wire is downwards.
Now applying Fleming's Left Hand Rule to wire CD, Current is along CD, Magnetic Field is as shown (North-> South), the motion of the wire is upwards.
The rectangular coil begins to move in the anti-clockwise direction
Note that during anti-clockwise motion, the split rings and axle also move, whereas the brushes don't move.
After half a rotation, Wire CD and Split ring Q moves to the left. Wire AB and Split ring P moves to right. Brushes X and Y donot move.
Now applying Fleming's Left Hand Rule to wire CD, Current is along DC. (Battery -> Split ring Q -> DC , Magnetic Field is as shown (North-> South), the motion of the wire is downwards.
Now applying Fleming's Left Hand Rule to wire AB, Current is along BA. (Battery -> Split ring Q -> DC --> CB -> BA --> Split ring P) , Magnetic Field is as shown (North-> South), the motion of the wire is upwards.
So, again the coil rotates in the anti-clockwise direction.
The reversal of current in the coil results in the continous rotation of the coil. The reversal of current is achieved by the commutator rings

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ANSWER

Explain in brief how ozone layer is getting depleted

Posted by Deep Tech 6 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Satyam Mishra 6 years, 1 month ago

Ozone layer becomes depleted due to the presence of CFCs takes place which comes out by refrigerators,Ac,many more They do not degrade easily these atoms of CFCs react with ozone and breaks their molecules

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Mr.Xxx ??? 6 years, 1 month ago

<font size=-2>yep

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Shreya .... 6 years, 1 month ago

Ozone layer has began to deplete due to environmental pollution. This was highly due to increasing use of CFCs. They do not degrade easily and rise up in the atmosphere in atoms. These atoms react with ozone and dissociations ozone molecules into oxygen.

2Thank You

ANSWER

Which is the only non metal liquid at room temperature

Posted by Abhishek Mahar 6 years, 1 month ago

CBSE > Class 10 > Science

10 answers

Mr.Xxx ??? 6 years, 1 month ago

Mecury is a metal which is found in liquid state at room temperature but bromine is the only non metal which is found in liquid state

1Thank You

Satyam Mishra 6 years, 1 month ago

Mecury

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Yogesh Rai 6 years, 1 month ago

Mercury and gallium

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Mr.Xxx ??? 6 years, 1 month ago

Bromine

2Thank You

Deep Tech 6 years, 1 month ago

Bromine

1Thank You

Srishti Rao 6 years, 1 month ago

Mercury

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Harsh Kumar 6 years, 1 month ago

bromine

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Harsh Kumar 6 years, 1 month ago

mercury

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Diksha? 6 years, 1 month ago

Bromine?

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Kajal Devrani 6 years, 1 month ago

Mercury

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ANSWER

Homologous series define

Posted by Puneet Verma 6 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Tahaseen Khan 6 years, 1 month ago

Homologous which have same structure but diff function

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Harsh Kumar 6 years, 1 month ago

homologous are the series in which two continuous atom differ by one carbon atom and two hydrogen atom

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Archit Gandhi 6 years, 1 month ago

Homologous series is a series in which successive groups differ by ch2 group

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ANSWER

Electrolytic reduction?

Posted by Diksha? 6 years, 1 month ago

CBSE > Class 10 > Science

5 answers

Harsh Kumar 6 years, 1 month ago

answer likh kar bhejo

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Dr. Sanskari ?‍⚕️?‍⚕️ 6 years, 1 month ago

Hi suhu???????

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♛ ❝Ѕυнαɴα❞ ♛ 6 years, 1 month ago

Hi dr?

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Dr. Sanskari ?‍⚕️?‍⚕️ 6 years, 1 month ago

Good night.....???????

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♛ ❝Ѕυнαɴα❞ ♛ 6 years, 1 month ago

Gud night

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Clening action of shoap

Posted by Rohit Dev 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Aadya Singh ? 6 years, 1 month ago

When soap is dissolved in water, it forms a colloidal suspension in water in which the soap molecules cluster together to form spherical micelles . In a soap micelle, the soap molecules are arranged radically with hydrocarbon ends directed towards the centre and the ionic ends directed outwards.
when a dirty cloth is put in water containing dissolve soap, then the hydrocarbon in soft soap molecules in the micelle attached to the oil or grease particles present on the surface of dirty cloth. In this way the soap micelle entraps the oil or dirty particles by using it's hydrocarbon ends. The ionic ends of the soap molecules in the micelle, however remain attached to water. When the dirty cloth is agitated in soap solution, the oily and greasy particles present on its surface and entrapped by soap micelles get dispersed in water due to which the soap water becomes dirty but cloth gets cleaned. The cloth is cleaned thoroughly by rinsing in clean water and number of times...

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What are lipids

Posted by Megha Agarwal 6 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Aadya Singh ? 6 years, 1 month ago

Fats are called lipids ...

3Thank You

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Sky appear to be dark insteat blue

Posted by Swastik Sharma 6 years, 1 month ago

CBSE > Class 10 > Science

2 answers

꧁༒Ķïłłěŕ_Ṩนℑåł༒꧂, Sharma 6 years, 1 month ago

Bcoz in space , there is not atmosphere. So, the phenomena of scattering light is not possible. May be??

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Rohit Dev 6 years, 1 month ago

Clening action of shoap

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What is the homologous and function

Posted by Abhishek Sharma 6 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 6 years, 1 month ago

Structures which have a common basic structure but perform different functions are called homologous structures, e.g., forelimbs of reptiles, amphibians and mammals. Yes, they have common ancestor but variously modified to carry out different activities.

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Sumitcool Coolsharma 6 years, 1 month ago

Homogenous has similar structure and different functions like mammals they have four limbs as their structure are same and perform different functions like birds, reptiles, etc

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How is fragmentation different from regeneration?

Posted by Shashwat Mehta 6 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 6 years, 1 month ago

Fragmentation	Regeneration
Organisms that are fragmented result in each fragment growing into an individual organism	Regeneration occurs when an organism only regrows a lost limb or any other part of the body.
A new individual emerges from each fragment	No new organisms are formed
Only a few organisms can fragment and form new individuals	All organisms exhibit the ability to regenerate to some degree
Fragmentation is observed in organisms such as flatworms and sponges	Examples of regeneration include regrowing a lost limb, such as the tail of a lizard

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Music Lovers Records 6 years, 1 month ago

Fragmentation is organism breaks into two or more small pieces each piece gives rise to new organisms Regenration is a single segment of an organisms can give rise to new individuals

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Why hydrogen is not evolved when a metal reacts with nitric acid..?? I need a answer in an easy language....

Posted by Shanvi Choudhary 6 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Shayra..? Khan..? 6 years, 1 month ago

Nitric acid is an oxidising agent it reacts with metal and oxidise them forming some oxides of nitrogen except in case of magnesium and manganese.

1Thank You

Aadya Singh ? 6 years, 1 month ago

Because nitric acid is an stong oxidizing agent and as soon as hydrogen is evolved in reaction between metal and nitric acid. Nitric acid oxidizes the hydrogen to water and itself is reduced to any of the oxides (nitrogen dioxide, nitrogen monoxide, etc.)

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ANSWER

Why do potassium and sodium react with cold water only..??why they do not react with medium or hot water..??

Posted by Shanvi Choudhary 6 years, 1 month ago

CBSE > Class 10 > Science