Chemistry Questions

Q:

Which of the following elements has the lowest melting point?

A) Chromium B) Hydrogen
C) Zinc D) Silver
 
Answer & Explanation Answer: B) Hydrogen

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Q:

The upper part of the heterosphere is composed almost completely of which gas?

A) Ozone B) Nitrogen
C) Oxygen D) Hydrogen
 
Answer & Explanation Answer: D) Hydrogen

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Q:

______ decreases the rate of setting of cement.

A) Alumina B) Silica
C) Gypsum D) Magnesium oxide
 
Answer & Explanation Answer: C) Gypsum

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Q:

Which of the following is not soluble in water?

A) Lead sulphate B) Zinc sulphate
C) Potassium sulphate D) Sodium sulphate
 
Answer & Explanation Answer: A) Lead sulphate

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Q:

Who was the first man to go to space?

A) Yuri Gagarin B) Yuri Rontgen
C) Yuris Cui D) Yuris Mahatinn
 
Answer & Explanation Answer: A) Yuri Gagarin

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Q:

An ∝ particle is _____.

A) A hydrogen molecule B) A helium nucleus
C) An atom of hydrogen D) A proton
 
Answer & Explanation Answer: B) A helium nucleus

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Q:

________ is made by mixing iron with carbon and metals like chromium, nickel and manganese.

A) Ship B) Stainless Steel
C) Rust D) Ozone
 
Answer & Explanation Answer: B) Stainless Steel

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Q:

Most liquids that conduct electricity are solutions of acids, bases and ______.

A) Copper B) Aluminium
C) Salts D) Iron
 
Answer & Explanation Answer: C) Salts

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