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