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

Pure ethanol is a flammable, colorless liquid with a boiling point of 78.5° C. Its low melting point of -114.5° C allows it to be used in antifreeze products. It has a pleasant odor reminiscent of whiskey. Its density is 789 g/l about 20% less than that of water. It is easily soluble in water and is itself a good solvent, used in perfumes, paints and tinctures.

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Factors affecting inheritance

Posted by Jatin Lodhi 5 years, 5 months ago

CBSE > Class 10 > Science

3 answers

Sana(Silent Love).. ?? 5 years, 5 months ago

Genes nd DNA r affecting on inheritance..

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Drift? Boi? 5 years, 5 months ago

Geans and DNA are affecting on inharitance .

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Drift? Boi? 5 years, 5 months ago

Bhai aap vi bada tezz ho rahe ho aap khud dusara ka line cura rahe ho aur hame sikha rahe ho oho @carryminati.

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ANSWER

What happend when poison was expired?it become more poisions or less poisions .

Posted by Drift? Boi? 5 years, 5 months ago

CBSE > Class 10 > Science

5 answers

Ishika ? 5 years, 5 months ago

Sorry to say drift boi but sana has given the right answer..........☺️☺️

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Drift? Boi? 5 years, 5 months ago

Sorry but your ans was right ???

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Sana(Silent Love).. ?? 5 years, 5 months ago

Ok ayush nd i m sry

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Drift? Boi? 5 years, 5 months ago

Aap hume mera naam vi lekar bila sakte hai. And ans was wrong .✖️✖️✖️

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Sana(Silent Love).. ?? 5 years, 5 months ago

I think the answer is less poisonous..

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During which month people sleep the least ?❓❓

Posted by Ishika ? 5 years, 5 months ago

CBSE > Class 10 > Science

5 answers

Sana(Silent Love).. ?? 5 years, 5 months ago

Hii ishika ??

2Thank You

Ishika ? 5 years, 5 months ago

Thanks both of you.......(hi dono ko)☺️☺️

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Sana(Silent Love).. ?? 5 years, 5 months ago

Sry.. drift boi agr aapko bura lga ho to kyunki maine answer late diya tha..

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Drift? Boi? 5 years, 5 months ago

February

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Sana(Silent Love).. ?? 5 years, 5 months ago

February am i right

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What goes through cities and field, but never move❓❓❓❓☺️☺️☺️☺️

Posted by Ishika ? 5 years, 5 months ago

CBSE > Class 10 > Science

3 answers

Ishika ? 5 years, 5 months ago

You both are correct......☺️☺️☺️☺️

1Thank You

Sana(Silent Love).. ?? 5 years, 5 months ago

Roads ( am i right)..??

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Drift? Boi? 5 years, 5 months ago

Roads .

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Whay disappears as soon as u say iys name.??

Posted by Sana(Silent Love).. ?? 5 years, 5 months ago

CBSE > Class 10 > Science

3 answers

Sana(Silent Love).. ?? 5 years, 5 months ago

Yss u r right.. sry agr aapko bura lga ho to kyunki Maine answer late diya tha..( drift boi)

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Sana(Silent Love).. ?? 5 years, 5 months ago

Its what not whay ..nd its not iys ??

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Drift? Boi? 5 years, 5 months ago

Silence .

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Turn me on my side nd i m everything, cut me half nd then i m nothing what am i????

Posted by Sana(Silent Love).. ?? 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Ishika ? 5 years, 5 months ago

The number 8......☺️☺️

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ANSWER

Chap 2 ncert que 5 mai dilute sulpheric acid ko hcl bolte to jab vo mg ka sath react karta hai to 2 hcl kyu

Posted by Monu Bhatt 5 years, 5 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

If u have me u want to share me,if u share me u dont have me? What am I ????

Posted by Sana(Silent Love).. ?? 5 years, 5 months ago

CBSE > Class 10 > Science

2 answers

Sana(Silent Love).. ?? 5 years, 5 months ago

Yes.. u r right

1Thank You

Ishika ? 5 years, 5 months ago

Secret....☺️☺️(is this a correct answer)

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ANSWER

The more of this there is, the less you see. What is it❓☺️☺️❓

Posted by Ishika ? 5 years, 5 months ago

CBSE > Class 10 > Science

3 answers

Ishika ? 5 years, 5 months ago

Yes you are correct sana.......(hello☺️ )

1Thank You

Tina ? 5 years, 5 months ago

I don't know

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Sana(Silent Love).. ?? 5 years, 5 months ago

Hiiii.. Darkness..( am i right)..

1Thank You

ANSWER

Plzzz explain me about Newland's Law of octaves...☺️☺️❓❓

Posted by Ishika ? 5 years, 5 months ago

CBSE > Class 10 > Science

3 answers

Yogita Ingle 5 years, 5 months ago

Newlands’ law of octaves

In 1866 an English scientist John Newlands arranged the elements in the order of
increasing atomic masses starting from the hydrogen having lowest atomic mass to the 56^th element named thorium having the highest atomic mass among the elements discovered at that time.
It was found that every eighth element possessed properties similar to that of the first. Sodium is the eighth element after Lithium possessing properties similar to one another. Similarly, beryllium and magnesium resemble each other.
This was comparable to octaves found in music and hence was called the ‘Law of Octaves’ or ‘Newlands’ Law of Octaves’.
But the Law of Octaves was applicable only up to calcium, after which every eighth element did not resembled the first element.

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Ishika ? 5 years, 5 months ago

Thanks mr avi......?☺️??

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

Law of octaves, in chemistry, the generalization made by the English chemist J.A.R. Newlands in 1865 that, if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of seven elements ????❤️❣️?

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write the chemical reaction when calcium hydroxide react with carbon dioxide in small amount and in excess amount

Posted by Pranjal Malik 5 years, 5 months ago

CBSE > Class 10 > Science

2 answers

Amanda Simmons 5 years, 5 months ago

In small amount~ Ca(OH)2 + CO2---> CaCO3 + H2O In excess amount~ CaCO3 + H2O + CO2---> Ca(HCO3)2

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Yogita Ingle 5 years, 5 months ago

Calcium hydroxide reacts with carbon dioxide to form calcium carbonate.

Aqueous calcium hydroxide reacts with carbon dioxide to form a white precipitate, calcium carbonate, and water. Carbon dioxide dissolves in water to produce carbonic acid,The carbonic acid reacts with OH- to produce the carbonate ion that precipitates with calcium ion.

Ca(OH)₂(s) + CO₂(g) → CaCO₃(s) + H₂O(g)

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What do you think about motion

Posted by Sporty⚾⚽? Boy ??? 5 years, 5 months ago

CBSE > Class 10 > Science

3 answers

Asil Khalifa 5 years, 5 months ago

Helpful in removing wastea from the body

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Lavina Bareja 5 years, 5 months ago

An object is said to be in motion when its position changes with time

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Drift? Boi? 5 years, 5 months ago

Sach me yeh question .

5Thank You

ANSWER

What is the position of image when object is kept at F

Posted by Onkar Singhsaini 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 5 months ago

When the object is placed at principal focus (F) of a concave mirror, a highly enlarged image is formed at infinity.

Properties of image:

Highly enlarged
Real and inverted

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Is there any scientific reason of death ..if yes so what is the reason????

Posted by Sana(Silent Love).. ?? 5 years, 5 months ago

CBSE > Class 10 > Science

5 answers

Raman Upadhyay 5 years, 5 months ago

Sorry for that here is your answer .The cell division slows down and stops at some point. Telomeres, which are located at the ends of the chromosomes are probably responsible for this. If these protective caps are shortened by cell division, then eventually no more cell division takes place. Then no more new cells get added and the old cells die.

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Sana(Silent Love).. ?? 5 years, 5 months ago

I m not showing this to anyone..nd ya maine kb broken heart apne user name pr lgaya.. if u dont like it i will change my user name..

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Sana(Silent Love).. ?? 5 years, 5 months ago

Pls give me the answer of my question..??

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Mahi....... . 5 years, 5 months ago

To whom u r showing your broken heart,sad emogi,and now this broken smile. kya ye sab batane se tumhari jo bhi personal problem solve ho jayegi kya

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Raman Upadhyay 5 years, 5 months ago

Again changed name

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ANSWER

Why do we mix baking powder value preparing cake and why we cannot use baking soda in place of baking powder

Posted by Umang Chaudhary 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 5 months ago

Baking powder has acid powder mixed with it.Wheareas baking soda needs acid to start action.More importantly baking powder can be eaten but baking soda can't be eaten.So,we use baking powder in cake.

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Why does the colour of the copper sulphate solution change when an iron nail is dipped in it????

Posted by Mahi....... . 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 5 months ago

If an iron nail is dipped in the copper sulphate solution then iron displaces copper from the copper sulphate because iron is more reactive than copper. Therefore the colour of the copper sulphate solution changes.
The reaction involved is as follows

Fe(s) + CuSO₄ (aq) → FeSO₄(aq) + Cu(s)

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ANSWER

The focal length , f=R/2 is valid:- (a)for convex mirror but not the concave mirror (b)for concave mirror but not for the convex mirror (c)for both convex and concave mirror (d)niether for convex mirror nor for concave mirror

Posted by Sunil Kumar Mishra 5 years, 5 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Define Hydrous Salts........❓❓❓☺️☺️☺️☺️

Posted by Ishika ? 5 years, 5 months ago

CBSE > Class 10 > Science

4 answers

Sana(Silent Love).. ?? 5 years, 5 months ago

Salt containing water of crystallization..

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Ishika ? 5 years, 5 months ago

Thanks......☺️☺️☺️☺️

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

Salts containing water of crystallization.

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Drift? Boi? 5 years, 5 months ago

Salts containing water of crystallization.

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ANSWER

If the magnification of a lens has a negative value,the image is:-(a)real and inverted (b)virtual (c)erect (d)none of these

Posted by Sunil Kumar Mishra 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 5 months ago

Magnification: Negative value corresponds to real & inverted images. Positive value corresponds to virtual & erect images.

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State any three properties of Sodium Hydroxide.....☺️☺️

Posted by Ishika ? 5 years, 5 months ago

CBSE > Class 10 > Science

5 answers

Ishika ? 5 years, 5 months ago

Hello mr.avi......?☺️☺️

2Thank You

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

Hi ishika ?❤️❣️❤️

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

chloride is readily soluble in water and insoluble or only slightly soluble in most other liquids. It forms small, transparent, colorless to white cubic crystals. Sodium chloride is odorless but has a characteristic taste.

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Ishika ? 5 years, 5 months ago

Thank you......................☺️☺️☺️☺️☺️☺️☺️☺️

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Drift? Boi? 5 years, 5 months ago

Chemical formula NaOH Molar mass 39.9971 g mol−1 Appearance White, waxy, opaque crystals Odor odorless

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Define each digestive glands

Posted by Jatin Lodhi 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

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

Digestive glands are the glands which bring about digestion process. These include salivary glands, gastric glands, intestinal glands, liver and pancreas. Salivary glands are present inside the buccal cavity. They secrete saliva.

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ANSWER

Through which part of the kidneys are the ureters located ?

Posted by Ronak Agarwal 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 5 months ago

The ureter is a tube that carries urine from the kidney to the urinary bladder. There are two ureters, one attached to each kidney. The upper half of the ureter is located in the abdomen and the lower half is located in the pelvic area.

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ANSWER

Types of cyclic compounds❓❓???☺️

Posted by Ishika ? 5 years, 5 months ago

CBSE > Class 10 > Science

4 answers

Ishika ? 5 years, 5 months ago

Thank you...☺️

1Thank You

Jatin Lodhi 5 years, 5 months ago

Inorganic cyclic compound

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Jatin Lodhi 5 years, 5 months ago

Heterocycle

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Jatin Lodhi 5 years, 5 months ago

Aromatic carbocycle

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The strength of acids and bases depends on the number of__________ions and_________iron produced respectively,when dissolved in water acid like HClO4 which dissociate almost completely in water are called__________acids

Posted by Sunil Kumar Mishra 5 years, 5 months ago

CBSE > Class 10 > Science

3 answers

Sunil Kumar Mishra 5 years, 5 months ago

2nd fill in the blanks OH+right answer hai ya fir OH-

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Drift? Boi? 5 years, 5 months ago

H+ ions and oH+ ions , lamst nahi pata

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Lucifer ? Morningstar? 5 years, 5 months ago

H+ ions and 0H– ions. Called strong acid

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ANSWER

An object is placed at a distance of 10 cm in front of a convex mirror. The image is formed at 5 cm behind the mirror. Find the focal length of the convex mirror?

Posted by Mustafijur Ahmed 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

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

Focal length of the lens (f) = 5 cm. We know, convex mirror always forms the virtual, upright and diminished. Also, Object distance in the convex mirror is always negative where as Image distance and focal length are positive. so the image distance (v) =3.33cm.

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Functions of nervous system?

Posted by Aahaan Kothari 5 years, 5 months ago

CBSE > Class 10 > Science

1 answers

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

The nervous system is involved in receiving information about the environment around us (sensation) and generating responses to that information (motor responses). The nervous system can be divided into regions that are responsible for sensation (sensory functions) and for the response (motor functions).

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What is rancidity????

Posted by Mahi....... . 5 years, 5 months ago

CBSE > Class 10 > Science

4 answers

Tisha Garg 5 years, 5 months ago

Rancidity means spoilage of food in such a way that it becomes undesirable for consumption due to it's contact with air or moisture

1Thank You

Ayush Aggarwal 5 years, 5 months ago

rancidity is rancidity

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Aahaan Kothari 5 years, 5 months ago

It gives foul odour and foul smell also

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Sana(Silent Love).. ?? 5 years, 5 months ago

Refers to the spoilage of food in such a way that it becomes undesirable for consumption ...

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What do u mean by CT scan???????

Posted by Sana(Silent Love).. ?? 5 years, 5 months ago

CBSE > Class 10 > Science

3 answers

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

❤️❤️❤️

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Sana(Silent Love).. ?? 5 years, 5 months ago

Thanks avi

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

A computerized tomography (CT) scan combines a series of X-ray images taken from different angles around your body and uses computer processing to create cross-sectional images (slices) of the bones, blood vessels and soft tissues inside your body ??❤️❤️

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Full form of USG??

Posted by Sana(Silent Love).. ?? 5 years, 5 months ago

CBSE > Class 10 > Science