hard

soft

porous

impervious

calcium carbonate

calcium oxide

calcium hydroxide

none of the above

only (i)

only (ii)

both (i) and (ii)

both (ii) and (iii)

Both A and R are true and R is correct explanation of A.

Both A and R are true and R is not a correct explanation of A.

A is true but R is false.

A is false but R is true.

burning of lime stone

burning of kankar

adding water to quick lime

calcination of pure clay