General Knowledge Part-18

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: Option C
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: Option A
3. The most electronegative element among
the following is
A. sodium
B. bromine
C. fluorine
D. oxygen
Answer: Option C
4. The metal used to recover copper from a
solution of copper sulphate is
A. Na
B. Ag
C. Hg
D. Fe
Answer: Option D
5. The number of d-electrons in Fe 2+ (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: Option D
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: Option A
7. The molecules of which gas have highest
speed?
A. H2 at -73o C
B. CH4 at 300 K
C. N2 at 1,027 oC
D. O2 at 0oC
Answer: Option A
8. The oldest rocks in the earth's crust were
once molten, and came from deep inside
the earth. The molten rock, called magma,
spewed out in volcanic eruptions during the
earth;s early life and solidified into hard
rock's called
A. granite
B. basalt
C. igneous rocks
D. sedimentary rocks
Answer: Option C

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