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Chemistry

Chemistry
Hardest allotrope of carbon is

Diamond
Coke
Graphite
Lamp black

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Chemistry
What material is used to make electric heater coil ?

Silver
Iron
Nichrome
Copper

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Chemistry
Oxygen which is vital for life is a product of photosynthesis and comes from

Oxides of mineral elements
Carbon dioxide
Water
Carbonates from soil

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Chemistry
Which one of the following forms of phosphorus is most reactive?

Violet phosphorus
Red phosphorus
Black phosphorus
White phosphorus

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Chemistry
A thick paste of cement, sand and water is called

Kiln
Mortar
R.C.C.
Concrete

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Chemistry
Which of the following is the petroleum wax ?

Carnauba wax
Bees wax
Paraffin wax
Jojoba wax

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MORE MCQ ON Chemistry

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