Showing 11–20 of 208 questions
Q.11
Medium
General Science
Which metal is liquid at room temperature?
A
Iron
B
Mercury
C
Aluminum
D
Copper
Correct Answer:
B. Mercury
Explanation:
Mercury is the only metal that remains liquid at room temperature (25°C). Its melting point is -38.8°C.
Q.12
Medium
General Science
What is the speed of light in vacuum?
A
2 × 10⁸ m/s
B
3 × 10⁸ m/s
C
4 × 10⁸ m/s
D
5 × 10⁸ m/s
Correct Answer:
B. 3 × 10⁸ m/s
Explanation:
The speed of light in vacuum is approximately 3 × 10⁸ m/s or 299,792,458 m/s to be precise.
Q.13
Medium
General Science
Which of the following vitamins helps in calcium absorption?
A
Vitamin A
B
Vitamin B
C
Vitamin D
D
Vitamin E
Correct Answer:
C. Vitamin D
Explanation:
Vitamin D helps in the absorption of calcium from the intestines, essential for bone health and development.
Q.14
Medium
General Science
What is the process by which solids directly convert to gases without becoming liquids?
A
Melting
B
Evaporation
C
Sublimation
D
Condensation
Correct Answer:
C. Sublimation
Explanation:
Sublimation is the process where a solid directly converts to a gas. Dry ice (solid CO₂) is a common example.
Q.15
Medium
General Science
Which blood group is considered a universal donor?
Explanation:
O- blood type is the universal donor as it lacks A, B, and Rh antigens on red blood cells.
Q.16
Medium
General Science
What is the chemical formula for sulfuric acid?
A
H₂SO₃
B
H₂SO₄
C
HSO₄
D
H₃SO₄
Explanation:
Sulfuric acid is H₂SO₄, one of the most important industrial chemicals with numerous applications.
Q.17
Medium
General Science
In the context of Newton's Laws of Motion, which law states that action and reaction are equal and opposite?
A
First Law
B
Second Law
C
Third Law
D
Fourth Law
Correct Answer:
C. Third Law
Explanation:
Newton's Third Law states that for every action, there is an equal and opposite reaction.
Q.18
Medium
General Science
Which organ in the human body produces insulin?
A
Liver
B
Pancreas
C
Kidney
D
Stomach
Correct Answer:
B. Pancreas
Explanation:
The pancreas produces insulin, a hormone that regulates blood glucose levels. The beta cells in the pancreas secrete this hormone.
Q.19
Medium
General Science
Which of the following is a renewable energy source?
A
Coal
B
Petroleum
C
Solar energy
D
Natural gas
Correct Answer:
C. Solar energy
Explanation:
Solar energy is renewable as the sun's energy is continuously available. Coal, petroleum, and natural gas are non-renewable fossil fuels.
Q.20
Medium
General Science
Which blood group is considered a universal recipient?
Explanation:
AB blood group is the universal recipient because it has both A and B antigens, allowing it to receive blood from all groups.
