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Chemistry

Chemistry
Which one of the following metals is used to galvanise iron ?

Mercury
Zinc
Lead
Copper

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Chemistry
Lead in water can cause

Hair falling
Arthritis
Eye disease
Kidney damage

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Chemistry
The ‘Green House effect’ is produced due to the presence of excess amount of

Nitrogen dioxide
Methane
Sulphur dioxide
Carbon monoxide

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Chemistry
Pollutant from motor car exhaust that causes mental disease is

Hg
NO2
SO2
Lead

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Chemistry
Which of the following elements is obtained from sea weeds ?

Iodine
Argon
Vanadium
Sulphur

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Chemistry
The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?

0.01 minute
3 billion years
13 days
100 years

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