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Chemistry

Chemistry
The heat energy produced when the human body metabolises 1 gram of fat is

1 KJ
29 KJ
39 KJ
30 KJ

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Chemistry
Carborundum is another name of

Calcium carbide
Silicon carbide
Calcium oxide
Silicon oxide

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Chemistry
Philosopher’s Wool is

Zinc carbonate
Zinc sulphate
Zinc oxide
Zinc blende

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Chemistry
What happens when a drop of glycerol is added to crushed KMnO4 spread on a paper ?

The paper ignites
There is a violent explosion.
There is no reaction.
There is a crackling sound

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Chemistry
One carat of diamond is equal to

200 mg
250 mg
100 mg
150 mg

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Chemistry
In arc welding, Argon is used because of its

Ability to lower the melting point of the metal
High calorific value
Low reactivity with metal
High flammability

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