TNPSC Group 4 Previous Year Question Paper Pdf Download - 1
Question: 1
What is a laughing gas?
(A) Sulphur dioxide
(B) Hydrogen peroxide
(C) Carbon monoxide
(D) Nitrous oxide
Ans: D
Nitrous oxide
Question: 2
Which one among the following most correctly determines the atomic number of an element?
(A) Number of ions
(B) Number of nucleons
(C) Number of protons
(D) Number of protons and electrons
Ans: C
Number of protons
Question: 3
Which of the following metals can deposit copper from copper sulphate solution?
(A) Gold
(B) Iron
(C) Mercury
(D) Platinum
Ans: B
Iron
Question: 4
In terms of magnetic properties, oxygen belongs to
(A) diamagnetic materials
(B) paramagnetic materials
(C) magnetic materials
(D) ferromagnetic materials
Ans: B
paramagnetic materials
Question: 5
Which one of the following is used in dry cleaning of garments?
(A) Asphalt
(B) Diesel oil
(C) Lubricating oil
(D) Naphtha
Ans: D
Naphtha
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