Home
Class 11
CHEMISTRY
Statement-I : Pure water obtained from d...

Statement-I : Pure water obtained from different sources such as, river, well, spring, sea etc. always contains hydrogen and oxygen combined in the ratio `1 : 8` by mass.
Because
Statement-II : `A` chemical compound always contains elements combined together in same proportion by mass. it wa discovered by French chemist, Joseph Proust `(1799)`.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
A

Pure water always contains hydrogen and oxygen in the ratio 1 : 8 by mass. This is in accordance with the law of constant composition.
Promotional Banner

Topper's Solved these Questions

  • SOME BASIC CONCEPTS OF CHEMISTRY

    ERRORLESS|Exercise PAST YEARS QUESTIONS|24 Videos
  • REDOX REACTIONS

    ERRORLESS|Exercise ASSERTION & REASON|6 Videos
  • STATES OF MATTER

    ERRORLESS|Exercise ASSERTION AND REASON|11 Videos

Similar Questions

Explore conceptually related problems

Pure water can be obtained from various sources, but it always contains hydrogen and oxygen, combined in a ratio of 1:8 by weight. This is an example of ________

Assertion: Pure water obtained from different sources always contains hydrogen and oxygen in the ratio of 1 : 8 by mass. Reason: Molecular mass of water is 18.

Assertion (A): pure water obtained from different states of india always contains hydrogen and oxygen in the ration of 1:8 by mass. Reason (R ): Total mass of reactants and products during chemical change is always the same.

In each of the following two questions two statements are given one labelled as the Assertion(A) or Statement I and the other labelled as the reason (R) or statement II. Examine these statements carefully and mark the correct choice as per following instructions Assertion (A) - Pure water obtained from different sources, such as river, well, spring, sea etc. always contains hydrogen and oxygen in ratio of 1:8 by mass Reason (R) - Mass of reactants and products during chemical or physical changes is always constant

If 100 grams of pure water taken from different sources is decomposed by passing electricity, 11 grams of hydrogen and 89 grams of oxygen are always obtained' . Which chemical law is illustrated by this statement ?