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Chemistry

Chemistry
What are the number of moles of CO2 which contains 16 g of oxygen?

0.5 mole
0.25 mole
0.2 mole
0.4 mole

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Chemistry
The metal ion present in Vitamin B12 is

Iron
Nickel
Zinc
Cobalt

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Chemistry
The element with highest first ionisation energy is

Lithium
Helium
Sodium
Hydrogen

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Chemistry
A detergent is a

Drug
Cleansing agent
Soap
Catalyst

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Chemistry
Sea water is saltier than rain water because

The air around the sea is saltish
Sea animals are salt producing
Rivers wash away salts from earth and pour them into the sea
Sea beds have salt producing mines

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Chemistry
Threshold limit value of copper in the atmospheric air is

1.0 mg/m3
0.01 mg/m3
5.0 mg/m3
0.001 mg/m3

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MORE MCQ ON Chemistry

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