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
Q. Semi-permeable membrane permits the flow of
1) Solute through it
2) Solvent throught it
3) Both (a) and (b) above
4) None of the above
Q. Which of the following copper alloys is used for the manufacture of resistance wire?
1) Aluminium bronze
2) German silver
3) Bell metal
4) None of these
Q. Which of the following copper alloys is used for the manufacture of springs and suspension filaments in electrical instruments?
1) Bronze
2) Aluminium bronze
3) German silver
4) Phosphorus bronze
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