A. 95 days
B. 120 days
C. 105 days
D. 130 days
A. Over 90 per cent
B. 70 per cent
C. 80 per cent
D. 85 per cent
A. Ascorbic acid
B. Formic acid
C. Acetic acid
D. Riboflavin
A. Sometimes light is seen first and sometimes sound is heard first
B. The light is seen first and sound is heard afterwards
C. The sound is heard at the same time as the light is seen
D. The light is seen after the sound is heard
A. Helicopter — Brequet
B. Aeroplane — Barthelemy
C. Telescope — Galileo
D. Barometer — Torricelli
A. Increases
B. Decreases
C. Remains unchanged
D. None of these
A. Hygrometer
B. Hydrometer
C. Gravimeter
D. Hypsometer
A. Long-sightedness
B. Short-sightedness
C. Cataract
D. None of these
A. Increase DC voltage
B. Increase or decrease AC voltage
C. Decrease DC voltage
D. Convert DC into AC