One of the forms of a naturally occurring solid compound P is usually used for making the floors of houses. On adding a few drops of dilute hydrochloric acid to P, brisk effervescence on adding dilute HCl to P. Gas Q is said t cause globel warning wheres solid R is used for white-washing. (a) What is (i) solid P (ii) gas Q, and (iii) solid R. (b) What is the total mass of Q and R obtained from 50 g of P ? (c) How does the total mass of Q and R formed compare with the mass of P taken ? (d) What conclusion do you get from the comparison of masses of products and reactant ? (e ) Which law of chemical combination is illustrated by the example given in this problem ?

One of the forms of a naturally occurring solid compound P is usually

1.	One of the forms of a naturally occurring solid compound P is usually used for making the floors of houses. On adding a few drops of dilute hydrochloric acid to P, brisk effervescence on adding dilute HCl to P. Gas Q is said t cause globel warning wheres solid R is used for white-washing. (a) What is (i) solid P (ii) gas Q, and (iii) solid R. (b) What is the total mass of Q and R obtained from 50 g of P ? (c) How does the total mass of Q and R formed compare with the mass of P taken ? (d) What conclusion do you get from the comparison of masses of products and reactant ? (e ) Which law of chemical combination is illustrated by the example given in this problem ?
Answer» Correct Answer - (a) (i) Calcium carbonate `(CaCO_(3))` in the form of marble (ii) Carbon dioxide `(CO_(2))` (iii) Calcium oxide `(CaO)` (b) `50 g` (c ) Total mass of Q and R `(50 g)` is euqal to the mass of P taken `(50 g)` (d) The mass of products is equal to the mass of reactant (e ) Law of conservation of mass

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