11.
Dry ice is-
A. Solid oxygen.
B. Solid carbon dioxide.
C. Solid hydrogen.
D. None of these.
Answer with Explanation
Answer: Option B
Explanation:
No explanation for this question.
12.
Myopia eyes can be corrected by-
A. Cocave lenses.
B. Covex lenses.
C. Neither Cocave lenses nor Covex lenses.
D. None of these.
Answer with Explanation
Answer: Option A
Explanation:
No explanation for this question.
13.
Crane machine is an example of-
A. Class I lever.
B. Class II lever.
C. Class III lever.
D. None of these.
Answer with Explanation
Answer: Option C
Explanation:
No explanation for this question.
14.
Speed of sound does not depend on-
A. Temparature.
B. Humidity.
C. Pressure.
D. None of these.
Answer with Explanation
Answer: Option C
Explanation:
No explanation for this question.
15.
Pitch of sound dependent on-
A. Wavelength.
B. Frequency.
C. Wavenumber.
D. Amplitude.
Answer with Explanation
Answer: Option B
Explanation:
No explanation for this question.
16.
Atomic number of an element is the-
A. Number of électrons in nucleus.
B. Number of protons in nucleus.
C. Number of électrons and protons in nucleus.
D. None of these.
Answer with Explanation
Answer: Option B
Explanation:
No explanation for this question.
17.
Which of the following are metalloid?
A. Zinc, Gold.
B. Arsenic, Antimony.
C. Silver, Platinum.
D. None of these.
Answer with Explanation
Answer: Option B
Explanation:
No explanation for this question.
18.
The main reason of using Helium gas in baloons in place of Hydrogen is-
A. Hydrogen is heavier than Helium.
B. Cost effective.
C. Hydrogen is highly flammable.
D. None of these.
Answer with Explanation
Answer: Option C
Explanation:
No explanation for this question.
19.
If a running bus suddenly applies brakes all the seated passengers fall in forward because of-
A. Newtons first law.
B. Newtons second law.
C. Newtons third law.
D. None of these.
Answer with Explanation
Answer: Option A
Explanation:
No explanation for this question.
20.
At which temparature the reading in both Farenheight and Centrigade thermometer will be the same?
A. -10 degree.
B. -50 degree.
C. -80 degree.
D. -40 degree.
Answer with Explanation
Answer: Option D
Explanation:
No explanation for this question.
21.
Ice at 0 degree Centrigrade more effective than water at 0 degree Centrigrade because-
A. Ice absorve 80 calorie less heat than water.
B. Ice absorve 80 calorie more heat than water.
C. Ice absorve 10 calorie more heat than water.
D. Ice absorve 10 calorie less heat than water.
Answer with Explanation
Answer: Option B
Explanation:
No explanation for this question.
