Class VII

When iron and Sulphur are mixed together at room temperature there is lack of
  1. reaction
  2. production of new product
  3. both a and b
  4. none of above
If 1g of hydrogen is mixed with 8 g of oxygen they water produced will be
  1. 9g
  2. 7g
  3. 8g
  4. 1g
In formation of compounds they involve
  1. chemical reaction
  2. physical reaction
  3. evaporation
  4. distillation
Sodium is found in periodic table on
  1. left side
  2. right side
  3. right side
Nitric acid combines with oxygen to produce brown fumes of
  1. nitrogen oxide
  2. nitrogen dioxide
  3. carbon dioxide
  4. nitrogen
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