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 $H_{2} O_{2}$ is different from that in $H_{2} O$ . 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.

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Detailed Solution

For statement (i), T=The other name of Gay-Lussac’s law is law of definite proportions by volume.
For statement (ii), F=Law of conservation of mass is valid for both physical and chemical change. Valid for both physical and chemical change.
For statement (iii), F=Law of definite proportion is valid for each compound individually and not for comparing two different compounds.
For statement (iv), T= must be a simple whole number ratio and must be a positive integer.
For statement (v), F=Equal volumes of all gases under similar conditions of temperature and pressure contain equal number of molecules.

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