Q. A hydrogen-inflated polythene balloon is released from the surface of the earth. As the balloon rises to an altitude up in the atmosphere, it will
1) Decrease in size
2) Flatten into a disc-like shape
3) Increase in size
4) Maintain the same size and shape
Q. Which of the following gas is used in cigarette lighters
1) Propane
2) Butane
3) Methane
4) Ethane
Q. Global warming is due to increased production of all the following, except
1) Methane
2) Ethane
3) Sulpher dioxide
4) Carbon dioxide
Q. Atomic number is equal to
1) Number of protons
2) Number of electrons
3) Number of nutron
4) Total number of protons and neutrons
Q. What is the formula of Marsh gas?
1) C2H6
2) CH4
3) NH3
4) CO2+NO2
Q. Which of the primary component of natural gas?
1) Methane
2) Butane
3) Propane
4) Ethane
Q. Which one of the following is not a constituent of stainless steel?
1) Chromium
2) Carbon
3) Nickel
4) Tin
Q. An automatic toaster is a... loop control system.
1) Open
2) Closed
3) Partially closed
4) None of the above
Q. In case of gas turbines, the gaseous fuel consumption guarantees are based on -
1) High heat value
2) Low heat value
3) Net calorific value
4) Middle heat value
Q. Natural rubber is polymer of -
1) Isobutane
2) Isoprene
3) Propane
4) Isopropene
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