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Chemistry

Chemistry
Iron is extracted from

Bauxite
Haematite
Dolomite
Cinnabar

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Chemistry
Earth’s atmosphere is an envelope of gases extending to a height of

100 km
300 km
200 km
150 km

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Chemistry
Which of the following elements is not present in stainless steel?

Iron
Nickel
Chromium
Tungsten

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Chemistry
If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by

Arsenic
Mercury
Iron
Lead

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Chemistry
Which of the following can be found as pollutants in the drinking water in some parts of India? Select the correct answer using the code given below.(A) Arsenic (B) Sorbitol (C) Fluoride (D) Formaldehyde (E) Uranium

A and C
A, C and E
A, B, C, D and E
B, D and E

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Chemistry
The substance most commonly used as a food preservative is

Tartaric acid
Sodium carbonate
Sodium salt of benzoic acid
Acetic acid

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