Category: Group III A and IVA Elements

A. 26%
B. 27%
C. 37%
D. <2.6%

A. Heat resistant
B. Low melting
C. Used to prepare chemical garden
D. Green in colour

A. As antiseptic in medicine
B. For washing eyes
C. In soda bottles
D. For enamel and glazes

A. Small size
B. High nuclear charge
C. Both A and B
D. No authorized justification yet

A. it has small size
B. it has high nuclear charge
C. it forms molecular addition compounds
D. all of the above

A. 1s2 2s2 2p3
B. 1s2 2s2 2p6 3s2 3p1
C. 1s2 2s2 2p4
D. 1s2 2s2 2p6 3s2 3p6 4s2 3d1

A. Na2B4O7.4H2O
B. Na2B4O7.5H2O
C. Na2B4O7.2H2O
D. Na2B4O7.10H2O

A. A1
B. Si
C. B
D. C

A. Ch3
B. OH
C. OCH3
D. O2

A. Lubricants
B. Hydraulic brakes
C. Antifreeze
D. Water repellent