Which statement is incorrect ?
A. All the metals are good conductor of electricity
B. All the metals are good conductor of heat
C. All the metals form positive ions
D. All the metals form acidic oxides
Submitted by :- Jamil Ahmed
Main use of salt in diet is to : ___________?
A. ease the process of cooking
B. increase the taste
C. produce small amount of hydrochloric acid required for digestion
D. increase solubility of food particles in water
Submitted by :- Jamil Ahmed
The source of the Sun’s energy is the process of ____________?
A. Photoelectric emission
B. Nuclear fusion
C. Nuclear fission
D. Thermionic emission
Submitted by :- Jamil Ahmed
The snow on the mountains does NOT melt all at once when it is heated by the sun because:
A. it becomes very hard
B. it reflects most of the heat from the sun
C. it has a low specific heat capacity
D. it has a high latent heat of fusion
Submitted by :- Jamil Ahmed
Which of the following is the primary source of oxygen that keeps humans and animals alive?
A. Carbon dioxide
B. Carbonates absorbed from soil
C. Oxides of minerals
D. Photosynthesis carried out by plants, algae, and some bacteria.
Submitted by :- Jamil Ahmed
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?
A. Radium dating
B. Carbon dating
C. Uranium dating
D. Deuterium dating
Submitted by :- Jamil Ahmed
Soap is prepared by boiling caustic soda with ___________?
Milk tastes sour when kept in the open for some time due to the formation of __________?
Water Gas is a mixture of two gases Hydrogen & Carbon monoxide, while separating Hydrogen gas by liquification process which one is liquefied first__?
A. Hydrogen Gas
B. Carbon Monoxide Gas
C. Both at same time
D. None of them
Submitted by :- Jamil Ahmed
Which of the following method is used to separate Hydrogen gas from water Gas?
A. Bosch Process
B. Cyber Twinkling process
C. Palladium process
D. Steam process
Submitted by :- Jamil Ahmed