Chemistry Multiple Choice Questions Set – 24

Question 1.

Where does the oxygen that keeps us alive come from?

A. Carbon dioxide
B. Carbonates absorbed from soil
C. Oxides of minerals
D. Water

Ans: D. Water

Question 2.

Which one of the following acids is used in battery ?

A. Hydrochloric acid
B. Hydrofluoric acid
C. Sulphuric acid
D. Sulphurous acid

Ans: C. Sulphuric acid

Question 3.

Sour taste of ‘Coca Cola’ is due to the presence of

A. Acetic acid
B. Phosphoric acid
C. Hydrochloric acid
D. Formic acid

Ans: B. Phosphoric acid

Question 4.

The substance most commonly used as a food preservative is

A. Sodium carbonate
B. Tartaric acid
C. Acetic acid
D. Sodium salt of benzoic acid

Ans: D. Sodium salt of benzoic acid

Question 5.

In chemical terms, what are alums used for purifying water for drinking purposes ?

A. Hydrated chlorides
B. Double nitrate
C. Double sulphates
D. Nitrates of aluminium

Ans: C. Double sulphates

Question 6.

Which of the following is the strongest base in aqueous solution ?

A. Diethylamine
B. Triethylamine
C. Ammonia
D. Ethylamine

Ans: A. Diethylamine

Question 7.

An acid having basicity one is

A. Sodium dihydrogen phosphate
B. Disodium hydrogen phosphate
C. Sodium phosphate
D. Phosphoric acid

Ans: B. Disodium hydrogen phosphate

Question 8.

Curd is sour due to presence of

A. Tartaric acid
B. Lactic acid
C. Acetic acid
D. Oxalic acid

Ans: B. Lactic acid

Question 9.

Brown stains in vessels and clothes indicate the presence of high quantities of __ in water.

A. Magnesium
B. Calcium
C. Manganese
D. None of these

Ans: D. None of these

Question 10.

Which of the following acids serves as an electrolyte in a lead storage battery?

A. Sulphuric acid
B. Lactic acid
C. Hydrochloric acid
D. Nitric acid

Ans: A. Sulphuric acid

Question 11.

The acid present in red ants is

A. Acetic acid
B. Butyric acid
C. Caproic acid
D. Formic acid

Ans: D. Formic acid

Question 12.

Drinking soda is

A. Alkaline
B. Acidic
C. Neutral
D. Oxidant

Ans: D. Oxidant

Question 13.

If water smells bad, then that odour can be removed by adding

A. Alum
B. Bleach
C. Activated carbon
D. Deactivated nitrogen

Ans: C. Activated carbon

Question 14.

Which is known as carbolic acid?

A. Phenol
B. Ethanol
C. Acetic acid
D. Oxalic acid

Ans: A. Phenol

Question 15.

Bee sting contains

A. An acidic liquid
B. A salt solution
C. An alkaline liquid
D. A corrosive liquid

Ans: A. An acidic liquid

Question 16.

Which of the following has pH value 7?

A. Pure Water
B. H2SO4
C. Sodium Carbonate
D. HCl

Ans: A. Pure Water

Question 17.

Surface water is a better source of drinking water because it is poor in

A. Dust
B. Bacteria
C. Arsenic
D. Algae

Ans: C. Arsenic

Question 18.

Citric acid is present in free form in

A. Tamarind
B. Milk
C. Apple
D. Lemon

Ans: D. Lemon

Question 19.

Sweat contains water and __

A. Citric acid
B. Lactic acid
C. Salt
D. Vinegar

Ans: C. Salt

Question 20.

Muscle fatigue is caused by the accumulation of :

A. Pyruvic acid
B. Lactic acid
C. Oxalacetic acid
D. Uric acid

Ans: B. Lactic acid

Chemistry GK MCQs all set

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