PG TRB Chemistry Previous Year Question Papers with Answers Pdf - 1

Question: 1

The gas liberated when lead nitrate heated is

(A) NO

(B) CO2

(C) NO2

(D) N2O

Ans: C

NO2

Question: 2

Which of the following metal occurs in the native state?

(A) Aluminium

(B) Iron

(C) Copper

(D) Gold

Ans: D

Gold

Question: 3

The atomic orbital is

(A) the circular path of the electron

(B) elliptical shaped orbit

(C) the region in which there is maximum probability of finding electron

(D) three dimensional field around nucleus

Ans: C

the region in which there is maximum probability of finding electron

Question: 4

Calamine is the ore of

(A) Aluminium

(B) Silver

(C) Copper

(D) Zinc

Ans: D

Zinc

Question: 5

Potassium nitrate is used in

(A) Fertilizer

(B) Glass

(C) Medicine

(D) Salt

Ans: C

Medicine

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