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Chemistry

Chemistry
Basicity of boric acid, H3BO3 is

3
5
4
2

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Chemistry
Which one of the following is most electronegative

Lead
Tin
Silicon
Carbon

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Chemistry
When ice cubes are made, the entropy of water

Decreases
Increases
May either increase or decrease depending on the process used
Does not change

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Chemistry
Vulcanization of rubber is carried out by adding

Sulphur
Phosphorus
Ozone
Carbon

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Chemistry
Nitrogen forms a variety of compounds in all oxidation states ranging from

–3 to + 6
–3 to + 5
–3 to + 3
–3 to + 4

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Chemistry
Which of the following is used in making smoke bombs?

Sulphur
Hydrogen
Phosphorus
Carbon

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