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A. Oxygen
B. Carbon dioxide
C. Halogens
D. Nitrogen
Answer
Answer
B. Carbon dioxide
Submitted by: Toheed Ahmed
Why are soft drinks made with chilled water rather than water at room temperature?
A. Chilled water is more hygienic
B. Chilled water enhances the taste
C. Ingredients dissolve better in chilled water
D. Chilled water attracts more carbon dioxide
Answer
Answer
D. Chilled water attracts more carbon dioxide
Submitted by: Toheed Ahmed
Coke is made by heating coal in the absence of air at:
A. 700°C
B. 1300°C
C. 900°C
D. 1700°C
Answer
Answer
B. 1300°C
Submitted by: Toheed Ahmed
In blood, the percentage of water is ________?
A. 75%
B. 85%
C. 90%
D. 95%
Answer
Answer
C. 90%
Submitted by: Toheed Ahmed
As the temperature of ice rises, the ice melts and its density
A. Remains constant
B. Decreases
C. Increases
D. Increases upto 10 °C
Answer
Answer
C. Increases
Submitted by: Toheed Ahmed
Water is a universal solvent for what reactions.
A. Biochemical
B. Physical
C. Chemical
D. Nuclear
Answer
Answer
A. Biochemical
Submitted by: Toheed Ahmed
The volume percentage of nitrogen in air is _________?
A. 60%
B. 67%
C. 74%
D. 78%
Answer
Answer
D. 78%
Submitted by: Toheed Ahmed
Nitrogen occur in plants and animals in the form of __________?
A. Proteins
B. Fats
C. Carbohydrastes
D. Minerals
Answer
Answer
A. Proteins
Submitted by: Toheed Ahmed
Air contains volume of carbon dioxide approximately;
A. 3%
B. 33%
C. 0.3%
D. 0.03%
Answer
Answer
D. 0.03%
Submitted by: Toheed Ahmed
The gases which are used by divers as an artificial atmosphere are helium and;
A. Carbon monoxide
B. Neon
C. Oxygen
D. Nitrogen
Answer
Answer
C. Oxygen
Submitted by: Toheed Ahmed