Q. Which of the following phenomenon is considered responsible for Global Warming?
-
(A)
Greenhouse effect
-
(B)
Fire in coal mines
-
(C)
Dry farming
-
(D)
Monsoon
✅ Correct Answer: (A)
Greenhouse effect
Q. The nucleus of an atom consists of
-
(A)
electrons and neutrons
-
(B)
electrons and protons
-
(C)
protons and neutrons
-
(D)
All of the above
✅ Correct Answer: (C)
protons and neutrons
Q. The number of moles of solute present in 1 kg of a solvent is called its
-
(A)
molality
-
(B)
molarity
-
(C)
normality
-
(D)
formality
✅ Correct Answer: (A)
molality
Q. The most electronegative element among the following is
-
(A)
sodium
-
(B)
bromine
-
(C)
fluorine
-
(D)
oxygen
✅ Correct Answer: (C)
fluorine
Q. The metal used to recover copper from a solution of copper sulphate is
-
(A)
Na
-
(B)
Ag
-
(C)
Hg
-
(D)
Fe
Q. 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)
✅ Correct Answer: (D)
p-electrons in CI(Z = 17)
Q. The metallurgical process in which a metal is obtained in a fused state is called
-
(A)
smelting
-
(B)
roasting
-
(C)
calcinations
-
(D)
froth floatation
✅ Correct Answer: (A)
smelting
Q. The molecules of which gas have highest speed?
-
(A)
H2 at -73oC
-
(B)
CH4 at 300 K
-
(C)
N2 at 1,027oC
-
(D)
O2 at 0oC
✅ Correct Answer: (A)
H2 at -73oC
Q. 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
✅ Correct Answer: (C)
igneous rocks
Q. The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is
-
(A)
Dalton's law
-
(B)
Gay Lussac's law
-
(C)
Henry's law
-
(D)
Raoult's law
✅ Correct Answer: (C)
Henry's law
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