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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