The main chemical constituent of clay is

53. The main chemical constituent of clay is

A.            silicon oxide

B.            aluminium borosilicate

C.            zeolites

D.            aluminium silicate

54.          The mineral containing both magnesium and calcium is

A.            magnesite           B.            calcite

C.            carnallite              D.            dolomite

Answer: Option D

55. The metal does not give H2 on treatment with dilute HCL is

A.            Zn           B.            Fe

C.            Ag           D.            Ca

Answer: Option C

56.The number of g-molecule of oxygen in 6.02 x 1024CO molecules is

A.            1 gram of molecule

B.            0.5 gram of molecule

C.            5 gram of molecule

D.            10 gram of molecule

Answer: Option C

57. The most extensive, commercially useful source of thorium as monazite sand occurs in India at

A.            Orissa coast

B.            Travancore coast

C.            West Bengal coast

D.            Gujarat coast

Answer: Option B

58.The main active constituent of tea and coffee is

A.            nicotine                B.            chlorophyll

C.            caffeine                               D.            aspirin

Answer: Option C

59. The maximum number of isomers for an alkene with molecular formula C4H8 is

A.            5              B.            4

C.            2              D.            3

Answer: Option B

60.The hardest form of carbon is

A.            coke                      B.            graphite

C.            diamond              D.            charcoal

Answer: Option C