Question

CHEMISTRY
SHORT ANSWER TYPE QUESTIONS
1. On passing excess CO2 through lime water, it first turns milky and then becomes colourless. Explain
why ? Write chemical equations.
2. How are bases different from alkalis ? Are all bases alkalis ?
3. While constructing a house, a builder selects marble flooring and marble top for kitchen where vinegar
and juices of lemon, tamarind etc. are more often used for cooking. Will you agree to this selection and
why?
4. Indicate with the help of a diagram the variation of pH with change in concentration of H+ (aq) and
OH-(aq) ions.
5. Write the name and formulae of three hydrated salts.
6. What happens wher, calcium carbonate is made to react with hydrochloric acid ? Give the equation of
reaction.
LONG ANSWER TYPE QUESTIONS
1. What is water of crystallization ? Write the common name and chemical formula of a commercially
important compound which has ten water molecules. How is this compound obtained ? Write chemical
equations also. List any two uses of this compound.
2. An element P does not react with dil. H2SO4. It forms an oxide PO which turns red litmus into blue. Will
you call P as a metal or a non-metal? Give reason.​

Answer 1

Answer:

2 question

basses do not dissolve in water

an alkali readily dissolves in water