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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