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Download WorksheetWhich of the following gases can be used for storage
(a) Carbon dioxide or Oxygen
(b) Nitrogen or Oxygen
(c) Carbon dioxide or Helium
(d) Helium or Nitrogen
Magnesium ribbon is rubbed before burning because it has a coating of
(a) basic magnesium carbonate
2.(b) basic magnesium oxide
(c) basic magnesium sulphide
(d) basic magnesium chloride
Which of the following is not a method employed to prevent rancidity of food?
Vacuum Packing
2.Air tight containers
3.Storing at high temperatures
4.Addition of preservatives
Primary alcohol undergo what reaction to form alkenes
Elimination
2.Reduction
3.Oxidation
4.Hydrolysis
Chemical reactions involve the participation of
Proteins
2.Nuclei
3.Neutrons
4.Electrons
When does any chemical reaction takes place ?
When entropy is minimum
2.Free energy is minimum
3.When temperature max
4.When reaction balances both side
MnO2 + Al → Al2O3 + Mn
(a) coefficient of MnO2 is 3.
(b) Coefficient of Al is 3.
(c) Coefficient of Mn is 3.
(d) Coefficient of Al2O3 is 2.
(a) and (b)
2.(a) and (c)
3.(a), (b) and (c)
4..(a), (c) and (d)
The oxide of nitrogen N2O5 do not contain N-N bond
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