Question

Which of the following substance cannot be broken down by a chemical method:-
(a)ammonia
(b)helium
(c)methane
(d)water



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Answer 1

Helium is the answer. Option (b) is correct.

Explanation:

• Helium is the unreactive elements, so it cannot be broken down by a chemical method.
• The other options are ammonia, methane and water are decomposed by chemical method.
• Using of ordinary chemical method. the substances are cannot be decomposed because substances are those pure substances.
• Heating, reaction and electrolyses are chemical methods.
• One nitrogen and three hydrogen atoms are present in ammonia, so it is a compound.
• So, ammonia can be broken down by chemical method, i.e. reaction.

To Learn More...

1.Which of the following substance cannot be broken by chemical method? a) Ammonia b) Helium. c) Methane d) Water

https://brainly.in/question/20810535

2.Q9. Which of the following substance cannot be broken down by a chemical

method?

(1) (a) Ammonia(NH) (b) Helium(He) (c) Methane(CH) (d)Water(H2O)​

https://brainly.in/question/25875203

Answer 2

Answer:

Which of the following substance cannot be broken down by a chemical method:-

(a)ammonia

(b)helium

(c)methane

(d)water

Explanation:

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b) Helium