Q. A very large volume of hydrogen can be accommodated by making -
1) non-metallic hydrides
2) hydrogen peroxide
3) non-stoichiometric hydrides
4) alkali metal hydrides
Q. Which one of the following is termed as Dry ice?
1) Ice present in ice-cream
2) Solid water at Antarctica
3) Solid state of carbon dioxide
4) Solid water of ionosphere
Q. Which one of the following substances is not a mixture?
1) Tin
2) Sea water
3) Soil
4) Air
Q. Soaps clean surfaces on the principle based on -
1) Viscosity
2) Floatation
3) Elasticity
4) Surface tension
Q. Which one of the following does not represent the salt, Calcium carbonate?
1) Lime water
2) Limestone
3) Chalk
4) Marble
Q. A sample of soft soap contains -
1) Caesium
2) Potassium
3) Calcium
4) Magnesium
Q. Which one of the following statements about water is not true?
1) Hydrogen bonds are present in liquid water
2) Water has a high boiling point
3) Water has a high heat of fusion
4) Water is a non-polar molecule
Q. Which one of the following compounds does not exhibit a different oxidation number of the same element?
1) Pb3O4
2) Fe3O4
3) Fe2O3
4) Mn3O4
Q. The elements present in urea are -
1) C, H, O
2) C, N, O
3) C, H, N
4) C, H, N, O
Q. The numbers of sigma and pi bonds in benzene are -
1) 3, 3
2) 3, 6
3) 12, 3
4) 12, 6
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