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

A. 700 °C
B. 900 °C
C. 1300 °C
D. 1700 °C

Submitted by: Ashfaque Ali Khoso

Related Mcqs:

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
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
A seed can germinate in the absence of__________?
A. Oxygen
B. Light
C. Moisture
D. Temperature

Submitted by: Malik Asghar Hussain
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
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
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
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
Which Vitamin gets destroyed on heating?
A. B
B. E
C. K
D. C

Submitted by: WIQAR AHMAD
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
Heating element of an electric heater is made up of___________?
A. Tungsten
B. Graphite
C. Chromium
D. Nichrome

Submitted by: Ashfaque Ali Khoso