Chemistry Class 10th MCQs

How much percentage of water on the earth is freshwater:

1. 2.5%
2. 3.5%
3. 4.5%
4. 5.5%

A substance that can donate a pair of electron to form coordinate covalent bond:

1. Lewis acid
2. Lewis base
3. Bronsted — Lowery acid
4. Bronsted - Lowery base

Salt among following is:

1. HCl
2. KCl
3. HNO3
4. H2SO4

Substances that react with both acids and bases are called:

1. Conjugate acids
2. Conjugate bases
3. Amphoteric substances
4. Buffers

The general formula for alkanes is:

1. CnH2n
2. CnH2n+1
3. CnH2n+2
4. CnH2n-1

Which of the following is an alcohol:

1. CH3-CHO
2. CH3-CH2-O-CH3
3. CH3-OH
4. HCOOH

Which of the following is a saturated hydrocarbon:

1. CH3-CH=CH2
2. CH3-CH2-CH3
3. CH3-C=CH
4. CH2=CH-C=CH

The prefix ‘hept’ stands for the ____ carbon atoms:

1. 2
2. 5
3. 7
4. 9

The functional group -COOH is used for:

1. Alkynes
2. Alcohols
3. Phenols
4. Carboxylic acids

Polyethene is:

1. Oil
2. Paper
3. Plastic
4. Wood

Acetic acid is obtained from:

1. Banana
2. Dates
3. Garlic
4. Vinegar