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Chemistry

Chemistry
The most important ore of lead is

Siderite
Galena
Magnetite
Pyrolusite

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Chemistry
In vulcanisation process, rubber can be hardened by adding

Nitrogen
Silicon
Alcohol
Sulphur

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Chemistry
Electric fuse is an alloy of

Carbon and tin
Zinc and lead
Tin and lead
Copper and iron

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Chemistry
The most abundant inert gas in the atmosphere is

Krypton
Neon
Argon
Helium

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Chemistry
Which method will be employed to test the hardness of water?

None of these
Formation of lather with soap
Boiling
Distillation

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Chemistry
One of the following is used to dissolve noble metals. That is

Nitric acid
Hydrochloric acid
Sulphuric acid
Aqua ragia

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