TRB Polytechnic Model Question Paper for Chemistry - 2

Question: 6

To prepare a standard solution of a substance, which of the following is generally used?

(A) A burette

(B) Measuring flask

(C) Small cylinder

(D) None of these

Ans: B

Measuring flask

Question: 7

When sodium acetate is heated with sodalime, it gives

(A) Ethanol

(B) Ethene

(C) Ethane

(D) Methane

Ans: D

Methane

Question: 8

One mole of water has the mass of

(A) 10 g

(B) 18 g

(C) 40 g

(D) 56 g

Ans: B

18 g

Question: 9

The number of carboxylic acid groups present in malonic acid is

(A) 1

(B) 2

(C) 3

(D) 4

Ans: B

2

Question: 10

The sulphur exists as

(A) S4

(B) S2

(C) S8

(D) S

Ans: C

S8

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