1. Carbon, diamond and graphite are together called
A. allotropes
B. isomers
C. isomorphs
D. isotopes
2. The element common to all acids is
A. hydrogen
B. carbon
C. sulphur
D. oxygen
3. Non stick cooking utensils are coated with
A. Teflon
B. PVC
C. black paint
D. polystyrene
4. Monazite is an ore of
A. titanium
B. zirconium
C. iron
D. thorium
5. 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
ANSWERS:
1. Answer: Option A
2. Answer: Option A
3. Answer: Option A
4. Answer: Option D
5. Answer: Option D
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