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Chemistry

Chemistry
Chloroform can be used as

Antibiotic
Antimalarial
Analgesic
Anaesthetic

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Chemistry
The element used for making solar cells is

Sodium
Magnesium
Silicon
Calcium

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Chemistry
One carat of diamond is equal to

250 mg
100 mg
200 mg
150 mg

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Chemistry
A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed?

From brown to orange-red
From pink to blue-green
From blue to pink
From brown to blue-black

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Chemistry
Maximum permissible concentration of total hardness in drinking water is

200
100
50
500

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Chemistry
Number of neutrons in an atom of hydrogen is

One
Three
Two
Zero

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