51. Which of the following has a least penetrating power?
A. All have same penetrating power
B. Beta Particles
C. Alpha particles
D. Gamma rays
✅ The correct answer is option C.
General Science MCQs
52. One horse power is equal to
A. 746 watts
B. 748 watts
C. 756 watts
D. 736 watts
✅ The correct answer is option A.
53. When an iron nail gets rusted, iron oxide is formed
A. without any change in the weight of the nail
B. with decrease in the weight of the nail
C. with increase in the weight of the nail
D. without any change in colour or weight of the nail
✅ The correct answer is option C.
54. Bromine is a
A. black solid
B. red liquid
C. colourless gas
D. highly inflammable gas
✅ The correct answer is option B.
55. How does common salt help in separating soap from the solution after saponification?
A. By decreasing density of Soap
B. By decreasing solubility of Soap
C. By increasing density of Soap
D. By increasing solubility of Soap
✅ The correct answer is option B.
56. Which of the following is used for removing air bubbles from glass during its manufacture?
A. Arsenous oxide
B. Potassium carbonate
C. Soda ash
D. Feldspar
✅ The correct answer is option A.
57. Kilowatt is a unit to measure
A. work
B. power
C. electricity
D. current
✅ The correct answer is option B.
58. Potassium nitrate is used in
A. medicine
B. fertiliser
C. salt
D. glass
✅ The correct answer is option B.
59. Water is a good solvent of ionic salts because
A. it has a high specific heat
B. it has no colour
C. it has a high dipole moment
D. it has a high boiling point
✅ The correct answer is option C.
60. Which of the following does not contain a coinage metal?
A. Silver and Gold
B. Zinc and Gold
C. Copper and Silver
D. Copper and Gold
✅ The correct answer is option B.