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Chemistry

Chemistry
One carat of diamond is equal to

250 mg
150 mg
200 mg
100 mg

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Chemistry
When cathode rays strike a target of high atomic weight, they give rise to

?-rays
? and ? rays
X-rays
Positive rays

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Chemistry
Slag is a name given for

Molten iron
Molten sand
Molten calcium silicate
Molten alumina

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

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Chemistry
Higher concentration of nitrogen dioxide in atmosphere air causes

Cancer
Bronchitis
Corrosion
Asphyxiation

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Chemistry
Which among the following coal contains 90 per cent of carbon?

Peat
Bitumen
Anthracite
Lignite

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MORE MCQ ON Chemistry

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