Which of the following reactions is not correct according to the law of conservation of mass-a 2 Mg s - O 2 g - 2 MgO s b C 3 H 8 g - O 2 g - CO 2 g - H 2 O g c P 4 s -5 O 2 g - P 4 O 10 s d CH 4 g -2 O 2 g - CO 2 g -2 H 2 O g

(b) In this equation, 44gC_3H_8 (g) + 32gO_2(g)→44gCO_2(g) + 18gH_2O(g) i.e., mass of reactants ≠ mass of products. Hence, law of conservation of mass is not f ...

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Standard XII

Chemistry

Laws of Mass Conservation

Which of the ...

Question

Which of the following reactions is not correct according to the law of conservation of mass ?

(a) $2 M g (s) + O_{2} (g) \to 2 M g O (s)$

(b) $C_{3} H_{8} (g) + O_{2} (g) \to C O_{2} (g) + H_{2} O (g)$

(c) $P_{4} (s) + 5 O_{2} (g) \to P_{4} O_{10} (s)$

(d) $C H_{4} (g) + 2 O_{2} (g) \to C O_{2} (g) + 2 H_{2} O (g)$

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Solution

(b)

In this equation,

$C_{3} H_{8} (g) 44 g + O_{2} (g) 32 g \to C O_{2} (g) 44 g + H_{2} O (g) 18 g$

i.e., mass of reactants $\neq$ mass of products.

Hence, law of conservation of mass is not followed.

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Similar questions

Q. In which of the following reactions

Δ H

is equal to

Δ U

Complete and balance the following reaction:

${CH}_{4} (g) + O_{2} (g) \to$

Q. For the following two reactions:
(i)

C H_{4} (g) + 2 O_{2} (g) \to C O_{2} (g) + 2 H_{2} O (g); Δ H = - 890.4 k J

(ii)

2 H g O (s) \to 2 H g (l) + O_{2} (g); Δ H = + 181.6 k J

Which one of the following statements is correct?

Complete and balance the given reaction:

$C_{3} H_{8} (g) + O_{2} (g) \to$

C H_{4} (g) + 2 O_{2} (g) \to C O_{2} (g) + 2 H_{2} O (g) + 800 k J

. If a mole of

O_{2} (g)

is consumed in the reaction, what energy is produced?

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Which of the following reactions is not correct according to the law of conservation of mass ? (a) 2Mg(s)+O2(g)→2MgO(s) (b) C3H8(g)+O2(g)→CO2(g)+H2O(g) (c) P4(s)+5O2(g)→P4O10(s) (d) CH4(g)+2O2(g)→CO2(g)+2H2O(g)

(b) In this equation, C3H8(g)44g+O2(g)32g→CO2(g)44g+H2O(g)18g i.e., mass of reactants ≠ mass of products. Hence, law of conservation of mass is not followed.

(b)

In this equation,

$C_{3} H_{8} (g) 44 g + O_{2} (g) 32 g \to C O_{2} (g) 44 g + H_{2} O (g) 18 g$

i.e., mass of reactants $\neq$ mass of products.

Hence, law of conservation of mass is not followed.