JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

Give the correct order of initials T or F for following statements. Use T if statement is true and F if it is false.
(i) Gay-Lussac’s law of gaseous volumes is actually the law of definite proportion by volume.
(ii) Law of conservation of mass is true for physical change, but not for chemical change.
(iii) The percentage of oxygen in $H_2O_2$ is different from that in $H_2O.$ Hence, it violates law of definite proportions.
(iv) Fixed mass of A reacts with two different masses of B (say x and y), then the ratio of x/y can be any positive integer.
(v) At STP, 5 mL of $N_2$ and $H_2$ have different no. of molecules.