11) Galvanised iron sheets have a coating of
A. lead
B. chromium
C. zinc
D. tin
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Answer Option C
12) The group of metals Fe, Co, Ni may best called as
A. transition metals
B. main group metals
C. alkali metals
D. rare metals
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Answer Option
13) The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of
A. bromine
B. fluorine
C. chlorine
D. sulphur
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Answer Option A
14) Non stick cooking utensils are coated with
A. Teflon
B. PVC
C. black paint
D. polystyrene
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Answer Option A
15) Carbon, diamond and graphite are together called
A. allotropes
B. isomers
C. isomorphs
D. isotopes
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Answer Option A
 Questions in Competitive Examinations){kind=link}