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

Question: 2

Which of the following metal occurs in the native state?

(A) Aluminium

(B) Iron

(C) Copper

(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

Question: 4

Calamine is the ore of

(A) Aluminium

(B) Silver

(C) Copper

(D) Zinc

Question: 5

Potassium nitrate is used in

(A) Fertilizer

(B) Glass

(C) Medicine

(D) Salt