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Chemistry

Chemistry
Silicon is a

Insulator
Semiconductor
Nonconductor
Conductor

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Chemistry
It is dangerous to leave the car engine running in a closed garage, because it may cause serious pollution due to poisoning by emission of

CO
SO2
CO2
Unburnt petrol

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Chemistry
Candle is a mixture of

Bees wax and stearic acid
Higher fatty acids and stearic acid
Paraffin was and stearic acid
Bees wax and paraffin wax

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Chemistry
Which of the following acts as best adsorbent?

Carbon black
Charcoal
Activated Coconut Charcoal
Activated Charcoal

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Chemistry
When there are two electrons in the same orbital, they have:

Opposite spin
Same spin
No spin
Same or opposite spin

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Chemistry
When a spoon is to be electroplated with nickel the spoon is

Dipped in a nickel sulphate solution
Coated with nickel sulphate and dried
Made cathode and a pure nickel red, the anode
Made anode and a pure nickel rod, the cathode

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