Chemistry MCQ

 

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Chemistry MCQ

Question 1
The mineral containing both magnesium and calcium is
A
magnesite
B
calcite
C
carnallite
D
dolomite

Question 2
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)

Question 3
Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be
A
2 : 16 : 2
B
2 : 16 : 1
C
1 : 16 : 2
D
1 : 1 : 1

Question 4
The octane number of zero is assigned to
A
2-methyl octane
B
n-heptane
C
iso-octane
D
3-methyl octane

Question 5
The hydronium ion is
A
H$^{+}$
B
HO -
C
H2$^{+}$
D
H$_{3}$O$^{+}$

Question 6
The main buffer system of the human blood is
A
H$_{2}$CO$_{3}$ - HCO$_{3}$
B
H$_{2}$CO$_{3}$ - CO$_{3}$$^{2-}$
C
CH$_{3}$COOH - CH$_{3}$COO$^{-}$
D
NH$_{2}$CONH$_{2}$ - NH$_{2}$CONH$^{+}$

Question 7
The most malleable metal is
A
platinum
B
silver
C
iron
D
gold

Question 8
The metal used to recover copper from a solution of copper sulphate is
A
Na
B
Ag
C
Hg
D
Fe

Question 9
The oil used in the froth floatation process is
A
coconut oil
B
olive oil
C
kerosene oil
D
pine oil

Question 10
The National Chemical Laboratory is situated in
A
New Delhi
B
Bangalore
C
Pune
D
Patna
There are 10 questions to complete.

 

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