Coke is made by heating coal in the absence of air at__________? - PakMcqs

Related Mcqs:

1. There is a hole in the Ozone Layer at__________?

   A. South Pole B. North Pole C. Both A and B D. None of These Submitted by: Munwar Ali Sohu...

2. Water has high density and minimum volume at__________?

   A. 0°C B. 4°C C. 100°C D. None of these Submitted by: Mir Turab Ali...

3. A seed can germinate in the absence of__________?

   A. Oxygen B. Light C. Moisture D. Temperature Submitted by: Malik Asghar Hussain...

4. Quantity of fresh air required for a man is 1000 cubic feet of air for every____________?

   A. 5 minutes B. 10 minutes C. 15 minutes D. 20 minutes Submitted by: WIQAR AHMAD...

5. During which process of energy exchange does cold air displace warmer air?

   A. Convection  B.  Radiation C.  Conduction D.  None of these Submitted by: Rida...

6. Brass gets discoloured in air because of the presence of which of the following gases in air ________ ?

   A. Carbon dioxide B. Oxygen C. Nitrogen D. Hydrogen sulphide Submitted by: Rashid Mehmood...

7. The increasing vapor pressure caused by heating a liquid is due to___________?

   A. increase inter-molecular interactions B. increasing potential energy of molecules C. increasing kinetic energy of molecules D. decreasing surface tension Submitted by: Mansoor Ul Haque...

8. Which Vitamin gets destroyed on heating?

   A. B B. E C. K D. C Submitted by: WIQAR AHMAD...

9. The atmosphere near the earth’s surface is “heated from below.” Which of the following does not significantly contribute to this heating _____________________?

   A. Conduction of heat upward from a hot surface B. Convection from a hot surface C. Absorption of infrared energy that has been radiated from the surface D. Heat energy from the earth’s interior Submitted by: Mansoor Ul Haque...

10. Heating element of an electric heater is made up of___________?

    A. Tungsten B. Graphite C. Chromium D. Nichrome Submitted by: Ashfaque Ali Khoso...