Q1.
The chemical formula of common salt is:
-
(A)
KCl
-
(B)
NaCl
-
(C)
CaCl₂
-
(D)
MgCl₂
Q2.
Which part of the plant conducts photosynthesis?
-
(A)
Root
-
(B)
Stem
-
(C)
Leaf
-
(D)
Flower
Q3.
The speed of light in vacuum is approximately:
-
(A)
3 × 10⁸ m/s
-
(B)
3 × 10⁶ m/s
-
(C)
3 × 10⁵ km/s
-
(D)
Both A and C
Q4.
The SI unit of force is:
-
(A)
Joule
-
(B)
Newton
-
(C)
Pascal
-
(D)
Watt
Q5.
Who proposed the theory of evolution by natural selection?
-
(A)
Mendel
-
(B)
Darwin
-
(C)
Lamarck
-
(D)
Aristotle
Q6.
Which organelle is known as the powerhouse of the cell?
-
(A)
Ribosome
-
(B)
Mitochondria
-
(C)
Golgi body
-
(D)
Lysosome
Q7.
Which gas is responsible for the greenhouse effect?
-
(A)
Oxygen
-
(B)
Nitrogen
-
(C)
Carbon dioxide
-
(D)
Hydrogen
Ans: (C) - Carbon dioxide
Q8.
Which vitamin is produced in the human body when exposed to sunlight?
-
(A)
Vitamin A
-
(B)
Vitamin B12
-
(C)
Vitamin C
-
(D)
Vitamin D
Q9.
The pH of a neutral solution is:
Q10.
Which blood group is called the universal donor?
-
(A)
AB+
-
(B)
O−
-
(C)
A+
-
(D)
B−
