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Chemistry

Chemistry
Atomic number is the number equal to

Electrons
None of these
Neutrons
Protons

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Chemistry
The process which does not evolve CO2 in air is

Breathing
Photosynthesis
Burning
Organic delay

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Chemistry
Which one of the following is a major green house gas?

Freon
Carbon monoxide
Carbon dioxide
Chloro fluorocarbon

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Chemistry
Which of the following causes the rusting of iron? a. Oxidation b. Reduction c. Chemical reaction with oxygend. Chemical reaction with CO2

A and c
A and b
C and d
B and c

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Chemistry
Alum is used as

A fertilizer
An analgesic
A disinfectant
A purifier for water

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Chemistry
DDT and BHC may act as

Carcinogens
Allergens
Asthematic agents
None of these

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MORE MCQ ON Chemistry

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