61. Paper is manufactured by
A. Wood and resin
B. Wood, sodium and bleaching powder
C. Wood, calcium, hydrogen sulphite and resin
D. Wood and bleaching powder
✅ The correct answer is option C.
General Science MCQs
62. Very small time intervals are accurately measure by
A. White dwarfs
B. Quartz clocks
C. Atomic clocks
D. Pulsars
✅ The correct answer is option C.
63. Electric current is measure by
A. commutator
B. anemometer
C. ammeter
D. voltmeter
✅ The correct answer is option C.
64. Rayon is chemically
A. cellulose
B. pectin
C. glucose
D. amylase
✅ The correct answer is option A.
65. One Joule is equal to
A. 105 ergs
B. 103 ergs
C. 107 ergs
D. 1011 ergs
✅ The correct answer is option C.
66. kilohertz is a unit which measures
A. power used by a current of one ampere
B. electromagnetic radio wave frequencies
C. voltage
D. electric resistance
✅ The correct answer is option B.
67. Which metal pollute the air of a big city?
A. Copper
B. Chromium
C. Lead
D. Cadmium
✅ The correct answer is option C.
68. Actinides are the elements with atomic numbers from
A. 97 to 104
B. 101 to 115
C. 89 to 103
D. 36 from 43
✅ The correct answer is option C.
69. Sodium metal is kept under
A. petrol
B. alcohol
C. water
D. kerosene
✅ The correct answer is option D.
70. The element common to all acids is
A. hydrogen
B. carbon
C. sulphur
D. oxygen
✅ The correct answer is option A.