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Chemistry

Chemistry
The process which does not evolve CO2 in air is

Organic delay
Burning
Photosynthesis
Breathing

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Chemistry
Detergents clean surfaces on the principle of

Elasticity
Viscosity
Surface tension
Floatation

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Chemistry
Percentage of carbon in steel ranges from

3.0 to 4.0
1.5 to 3.0
4.0 to 6.0
0.1 to 1.5

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Chemistry
What material is used to make electric heater coil ?

Copper
Nichrome
Silver
Iron

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Chemistry
Number of6.023 × 1020 atoms present in one mole of a gas at STP is

'6.023 × 10–20
6.023 × 1020
'6.023 × 10–23
6.023 × 1023

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Chemistry
Which of the following vegetable oils does not contain essential fatty acids ?

Coconut oil
Groundnut oil
Sunflower oil
Mustard oil

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MORE MCQ ON Chemistry

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