67) Regarding 'Dry Ice' which of the following statement is correct

It does not contain impurities

It is solidified form of Carbon dioxide

It is free from water

None of the above

Answer is:

It is solidified form of Carbon dioxide

ISRO Technician-B MRAC Question Paper - 2017 (Set -1) with Answer Key

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68) Density of water is maximum at

0 degree celsius

4 degree Celsius

100 degree celsius

0 degree kelvin

Answer is:

4 degree Celsius

69) Barometer is used to measure

very low pressure

pressure in pipes, channels etc

atmospheric pressure

difference of pressure between two points

Answer is:

atmospheric pressure

Explanation:

Atmospheric pressure: The atmospheric air exerts a normal pressure upon all surfaces with which it is in contact and it is known as atmospheric pressure. Atmospheric pressure is also known as barometric pressure. Barometer is used to measure atmospheric pressure.