chemistry general knowledge questions

1.

The nucleus of an atom consists of
A.     electrons and neutrons
B.     electrons and protons
C.     protons and neutrons
D.     All of the above
Answer & Explanation

Answer: Option C

Explanation:

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2.

The number of moles of solute present in 1 kg of a solvent is called its
A.     molality    B.     molarity
C.     normality    D.     formality
Answer & Explanation

Answer: Option A

Explanation:

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3.

The most electronegative element among the following is
A.     sodium    B.     bromine
C.     fluorine    D.     oxygen
Answer & Explanation

Answer: Option C

Explanation:

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4.

The metal used to recover copper from a solution of copper sulphate is
A.     Na    B.     Ag
C.     Hg    D.     Fe
Answer & Explanation

Answer: Option D

Explanation:

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5.

The number of d-electrons in Fe2+ (Z = 26) is not equal to that of
A.     p-electrons in Ne(Z = 10)
B.     s-electrons in Mg(Z = 12)
C.     d-electrons in Fe(Z = 26)
D.     p-electrons in CI(Z = 17)
Answer & Explanation

Answer: Option D

Explanation:

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6.

The metallurgical process in which a metal is obtained in a fused state is called
A.     smelting    B.     roasting
C.     calcinations    D.     froth floatation
Answer & Explanation

Answer: Option A

Explanation:

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