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The sulphide ores are converted into oxides by heating strongly in the presence of excess air. This process is known as
Anonymous Quiz
33%
Roasting
31%
Smelting
25%
Calcination
11%
Refining
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In electrolytic refining, the cathode is made up of
Anonymous Quiz
42%
Pure metal
23%
Impure metal
26%
Alloy
8%
Mettalic salt
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Magnesium ribbon is rubbed before burning because it has a coating of
Anonymous Quiz
20%
Magnesium sulphide
24%
Magnesium chloride
46%
Magnesium oxide
10%
Magnesium carbonate
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Oxidation is a process which involves
Anonymous Quiz
62%
Addidation of oxygen
13%
Addition of hydrogen
11%
Remove of oxygen
13%
Remove of hydrogen
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. Give the ratio in which hydrogen and oxygen are present in water by volume.
Anonymous Quiz
17%
1:6
20%
1:4
35%
1:2
28%
1:8
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When Ag is exposed to air it gets a black coating of
Anonymous Quiz
47%
Agno3
22%
Ag2s
14%
Ags
17%
Agcl
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A substance added to food containing fats and oils is called:
Anonymous Quiz
23%
Oxidant
42%
Rancidant
10%
Coolant
25%
Antioxidant
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Which of the following help in protecting the inner lining of the stomach from the harmful effect of hydrochloric acid?
Anonymous Quiz
35%
Mucus
29%
Pepsin
22%
Trypsin
14%
Bile
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Sometimes we get painful cramps in our leg muscles after running for a long time due to the accumulation of:
Anonymous Quiz
15%
Hcl
17%
Fat
14%
Co2
53%
Latic acid
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The law of reflection hold true for
Anonymous Quiz
26%
Plan mirror only
14%
Concave
10%
Convex
50%
All refrecting surface
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