Q. Which of the following gas is responsible for acid rain?
1) Ammonia (NH3)
2) Carbon monoxide (CO)
3) Methane (CH4)
4) Sulphur dioxide(SO2)
Q. Which of the following calcium compound is used as a mild abrasive in toothpaste?
1) CaO
2) Ca(OH)2
3) CaCO3
4) CaCl2
Q. Ozone is a molecule made up of ________________ oxygen atoms.
1) four
2) two
3) one
4) three
Q. Nitrogen is a ________________________ element.
1) diatomic
2) tetra-atomic
3) poly-atomic
4) monoatomic
Q. How many electrons are there in the outermost shell of group 16 element?
1) 5
2) 4
3) 3
4) 6
Q. Adding Cl2 to benzene in the presence of AlCl3 is an example of -
1) Addition reaction
2) Substitution reaction
3) None of the options
4) Elimination reaction
Q. Copper substances when exposed to air gain a green coating due to the formation of -
1) Cu (NO3)2
2) Cu SO4
3) CuO
4) CuCO3 Cu(OH)2
Q. The chemical name of Gammaxane is -
1) Chloro benzene
2) Benzene hexachloride
3) Toluene
4) Aniline
Q. The chemical name of quick lime is -
1) Calcium chloride
2) Calcium oxide
3) Calcium carbonate
4) Calcium hydroxide
Q. The antacid marketed as milk of magnesia has as the main ingredient -
1) MgSO4
2) MgCI2
3) MG(HO)2
4) MgCO3
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