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10th Chemistry Important Keys
Aziz
July 6, 2021
6:35 pm
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1.
The colour of potassium dichromate salt is
Red
Blue
Orange
None of them
2.
Pure water has the taste
Sour
Salty
None of them
Tasteless
3.
Solvation is the process that makes
Pure water
Mineral water
Solution
None of them
4.
Plants mainly composed of
Lipids
None of them
Proteins
Carbohydrates
5.
Major compound present in natural gas is
Ethane
Methane
Propane
None of them
6.
the atmosphere contains almost the oxygen
None of them
78%
20%
21%
7.
Most chemical reactions show
Heat energy
None of them
Pressure
Reversibility
8.
Petroleum is refined by the technique of
All of above
None of them
Distillation
Condensation
9.
the important source of organic compounds is
All of above
None of them
Petroleum
Coil
10.
the Major fraction in the CNG is
Methane
None of them
Propane
Ethane
11.
Methane gas is used in preparation of
Urea
Petrol
Copper ore
None of them
12.
Vitamin D is Found in
Potatoes
Synthesized when body is exposed to sun light
Citrus fruits
None of them
13.
the largest fresh water source of earth is
None of them
Sea
ground water resources
Rivers
14.
A solution having Ph of 7.5 mean that it is
Neutral
None of them
Acidic
Basic
15.
the hard water contains the bicarbonates and sulphates of
Ca
Mg
Both of these
None of them
16.
Deficiency of vitamin A causes
Bone disease
Scurvy
Night Blindness
None of them
17.
dehydration of alcohols with sulphuric acid yields
Alkene
None of them
Alkyne
Alkane
18.
the Number of essential amino acids are
None of them
30
20
10
19.
Fats perform the function of
Perform all these functions
A source of dietary energy
None of them
Protects vital organs
20.
21.
pressure of system effects the equilibrium of
Liquids
None of them
Gases
Solids
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