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Chemistry

Chemistry
Which among the following is pure matter ?

Air
Iron
Brass
Carbon–dioxide

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Chemistry
When a bond is formed between two atoms, the energy of the system will

Decrease
May increase or decrease
Remain the same
Increase

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Chemistry
Which one of the following statements is not correct? Vulcanisation of rubber makes it

Withstand higher temperatures
Strong and hard
Soft and flexible
Chemical resistant

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Chemistry
The chemical name of baking soda is

Sodium bicarbonate
Sodium chloride
Sodium carbonate
Sodium nitrate

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Chemistry
Ozone consists of

Oxygen only
Oxygen and Nitrogen
Oxygen and Carbon
Hydrogen and Carbon

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Chemistry
0.01 mole of NaOH is added to 10 liters of water. The pH of water changes by

3
4
6
7

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MORE MCQ ON Chemistry

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