Kerosene oil rises in a wick of lantern because of
buoyancy of air
diffusion of the oil through the wick
capillary action in the wick
gravitational pull of the wick
C.
capillary action in the wick
Due to presence of pores (narrow spacings) in the wick, capillary action takes place, which makes the oil to rise in the wick.
Heat given to a body which raises its temperature by 1° C is known as
water equivalent
thermal capacity
specific heat
temperature gradient
The burning sensation of a beesting can be stopped by rubbing the affected area with soap. This is because
a beesting is acidic and soap, an alkali, neutralizes it
a beesting is alkaline and soap, an acid, neutralizes it
soap cleans the affected area and removes the sting
soap acts as an anesthetic and dulls the sensation
Fahrenheit and Celsius are the two scales used for measuring temperature. If the numerical value of a temperature recorded in both the scales is found to be same, what is the temperature?
- 40°
+ 40°
+ 72°
- 72°
Which of the following statements in connection with the properties of water is/are correct?
Select the correct answer using the code given below.
1 only
2 and 3
1 and 3
3 only
Magnetic Resonance Imaging (MRD) is used in medical diagnosis to obtain images of our internal body organs. This is primarily possible because
our body possesses a permanent magnet
MRI uses an external magnet to generate a magnetic field in our body
MRI uses an external electric field to generate magnetic field in our body
ions motion along our nerve cells generates magnetic fields
Movements of tides are mostly determined by
albedo effect
wind velocity
rotation of the Earth
revolution of the Earth
Which of the following groups of plants can be used as indicators of SO2 pollution of air?
Ferns
Mentha
Lichens
Hornworts
The pH of fresh milk is 6. When it turns sour, the pH
becomes < 6
remains the same, i.e., 6
becomes > 6
becomes neutral, i.e., 7
