Q. Which of the following metals does not get affected by nitric acid?
1) Copper
2) Gold
3) Mercury
4) Silver
Q. Which of the following is a polymer?
1) Vinyl Chloride
2) Urea
3) Starch
4) Styrene
Q. Rusting of iron is an example of
1) Absorption
2) Adsorption
3) Oxidation
4) Reduction
Q. Mass number of an Uranium isotope which is used in atom bom is
1) 231
2) 233
3) 235
4) 236
Q. German silver is an alloy of
1) Copper, silver and zinc
2) Copper, nickel and zinc
3) Silver, tin and zinc
4) Silver, nickel and zinc
Q. The term `carat' is used to express purity of gold. The purest form of gold is
1) 18 carats
2) 20 carats
3) 22 carats
4) 24 carats
Q. Which is the strongest acid?
1) H2SO4
2) HCl
3) HNO3
4) H2CO3
Q. The process of bleaching by chlorine is called
1) Decomposition
2) Oxidation
3) Reduction
4) Substitution
Q. In which of the following compounds the oxidation number of oxygen is +2?
1) F2O
2) O3
3) KO3
4) Na2O2
Q. A high value of half life period of a radioactive element means
1) High instability
2) Greater stability
3) Decay with emission of β-particles only
4) Emission of α-particles only
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