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A. Silicon
B. Zironium
C. Selenium
D. Sodium
Answer
A. Silicon
Submitted by: Toheed Ahmed
Which one of the following mixture of gases is required in gas welding?
A. Acetylene and hydrogen
B. Acetylene and oxygen
C. Oxygen and ethylene
D. Oxygen and hydrogen
Answer
B. Acetylene and oxygen
Submitted by: Toheed Ahmed
The largest cell in the human body is
A. Muscle cell
B. Nerve cell
C. Liver cell
D. Kidney cell
Answer
B. Nerve cell
Submitted by: Toheed Ahmed
Dead red blood corpuscles are stored in
A. Kidney
B. Spleen
C. Heart
D. Liver
Answer
B. Spleen
Submitted by: Toheed Ahmed
A thermostat is ________?
A. A device used to maintain a constant temperature of a water bath or an oven
B. A modern type of thermoflask which work on the principle of equipartition of heat energy
C. An instrument by which the accuracy of thermometers determined
D. A device which varies the temperature of a bath
Answer
A
Submitted by: Toheed Ahmed
The time interval between two beats of a normal human heart is
A. 0.5 second
B. 2 seconds
C. 1 second
D. 3 seconds
Answer
C. 1 second
Submitted by: Toheed Ahmed
Which one of the following represents a chemical change?
A. Heating of mercuric oxide powder
B. Sublimation of iodine
C. Heating a platinum wire in a bunsen flame
D. Evaporation of alcohol
Answer
A. Heating of mercuric oxide powder
Submitted by: Toheed Ahmed
Nitrogen is prepared in the laboratory by heating
A. Aluminium nitrate
B. Ammonium sulphate
C. The mixture of ammonium chloride and sodium nitrite
D. The mixture of ammonium chloride and calcium oxide
Answer
C. The mixture of ammonium chloride and sodium nitrite
Submitted by: Toheed Ahmed
The material used for bleaching paper pulp is
A. Sodium
B. Lime
C. Alum
D. Caustic soda
Answer
A. Sodium
Submitted by: Toheed Ahmed
Which of the following is a gas?
A. Chlorine
B. Plutonium
C. Thorium
D. Mercury
Answer
A. Chlorine
Submitted by: Toheed Ahmed