Chemistry Study Material for UPSC, IAS, Gate, SSC, TNPSC, TRB, TET Exams - 1

Question: 1

Which of the following is most reactive among the halogens?

(A) Iodine

(B) Bromine

(C) Chlorine

(D) Fluorine

Ans: D

Fluorine

Question: 2

Which form of phosphorus is used in safety matches?

(A) Red phosphorus

(B) Black phosphorus

(C) Yellow phosphorus

(D) White phosphorus

Ans: A

Red phosphorus

Question: 3

Which one is equal to the solution of morality in a molar solutions?

(A) 1

(B) 2

(C) 3

(D) 4

Ans: A

1

Question: 4

In fireworks, the green flame is produced because of

(A) Barium

(B) Potassium

(C) Mercury

(D) Sodium

Ans: A

Barium

Question: 5

Which one of the following laws explain the formation of carbon monoxide and carbondioxide from carbon and oxygen?

(A) Law of definite proportions

(B) Law of reciprocal proportions

(C) Law of conservation of mass

(D) Law of multiple proportion

Ans: D

Law of multiple proportion

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