Q. Rate of diffusion of a gas is
1) Directly proportional to its density
2) Directly proportional to its molecular weight
3) Directly proportional to the square root of its molecular weight
4) Inversely proportional to the square root of its molecular weight
Q. The equilibrium constant decreases with rise of temperature in the case of
1) Endothermic reaction
2) Exothermic reaction
3) Heterogeneous reaction
4) Homogeneous reaction
Q. Liquid is characterised by its
1) Fluidity
2) No definite shape but definite volume
3) Capacity to dissolve the solids
4) All of these properties
Q. Which of the following two elements are present in the largest number of compounds?
1) Carbon and hydrogen
2) Carbon and nitrogen
3) Carbon and oxygen
4) Oxygen and hydrogen
Q. The process which brings about chemical decomposition of a substance by water is called
1) Hydrogenation
2) Hypotrophy
3) Hybridisation
4) Hydrolysis
Q. Which of the following copper alloys is used for the manufacture of caps of cartridges?
1) Brass
2) Bronze
3) Gun metal
4) German silver
Q. Which of the following copper alloys is used for the manufacture of gears and bearings?
1) Brass
2) Bell metal
3) Gun metal
4) Aluminium bronze
Q. The rate constant for a first order reaction depends on
1) Initial concentration of reactants
2) Time of reaction
3) Extent of reaction
4) Temperature
Q. For the manufacture of cement, which of the following is used in the largest quantity?
1) Alumina
2) Calcium oxide
3) Gypsum
4) Silica
Q. Which of the following metals has the lowest melting point?
1) Lead
2) Lithium
3) Potassium
4) Sodium
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