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Chemistry

Chemistry
Percentage of lead in lead pencils is

80
40
31-66

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Chemistry
The temperature of oxy-acetylene flame is around

3200°C
4000°C
3600°C
2800°C

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Chemistry
Candle is a mixture of

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

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Chemistry
Gas released during Bhopal tragedy was :

Ethyl isothiocyanate
Sodium isothiocyanate
Methyl isothiocyanate
Potassium isothiocyanate

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Chemistry
Sodium is produced by the electrolysis of

Aqueous brine solution
Molten sodium carbonate
Molten sodium chloride
Its cyanide complex

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Chemistry
________ is a by product of sewage treatment and can be decomposed to produce biogas

Scum
Sewer
Sewage
Sludge

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MORE MCQ ON Chemistry

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