NEET Exam  >  NEET Questions  >  A metal carbonate on heating is converted to ... Start Learning for Free
A metal carbonate on heating is converted to metal oxide and is reduced to 60% of it's original weight. The equivalent weight of the metal is a) 5 b) 25 c) 60 d) 70?
Most Upvoted Answer
A metal carbonate on heating is converted to metal oxide and is reduce...
Community Answer
A metal carbonate on heating is converted to metal oxide and is reduce...
Explanation:

When a metal carbonate is heated, it decomposes to form metal oxide and carbon dioxide.

The chemical equation is:

Metal Carbonate → Metal Oxide + Carbon Dioxide

Let the metal carbonate be MCO3, then the equation will be:

MCO3 → MO + CO2

Now, we are given that on heating, the metal carbonate is reduced to 60% of its original weight. This means that the metal oxide formed has a weight of 40% of the original weight of the metal carbonate.

Let the original weight of the metal carbonate be x grams, then the weight of the metal oxide formed will be 0.4x grams.

The equivalent weight of a metal is the atomic weight divided by the valency. Let the valency of the metal be n.

Then, the equivalent weight of the metal is:

Equivalent weight = Atomic weight / n

Let the atomic weight of the metal be A.

Now, we can use the law of conservation of mass to relate the weights of the metal carbonate and the metal oxide formed.

The total weight of the metal carbonate is x grams, and the total weight of the metal oxide and carbon dioxide formed is 0.4x + y grams, where y is the weight of carbon dioxide formed.

According to the law of conservation of mass:

Weight of metal carbonate = Weight of metal oxide + Weight of carbon dioxide

x = 0.4x + y

y = 0.6x

This means that the weight of carbon dioxide formed is 60% of the original weight of the metal carbonate.

Now, we can use the concept of equivalent weight to relate the weights of the metal carbonate and the metal oxide formed.

The equivalent weight of the metal carbonate is:

Equivalent weight of MCO3 = Atomic weight of M / (n × 2)

This is because the valency of carbonate ion is -2 and there are two carbonate ions in one molecule of metal carbonate.

Similarly, the equivalent weight of the metal oxide is:

Equivalent weight of MO = Atomic weight of M / n

Now, we can use the fact that the weight of metal oxide formed is 40% of the original weight of the metal carbonate to write:

(Equivalent weight of MCO3) × x = (Equivalent weight of MO) × 0.4x

(A / (n × 2)) × x = (A / n) × 0.4x

n = 5

Therefore, the valency of the metal is 5.

The equivalent weight of the metal is:

Equivalent weight = Atomic weight / n

Equivalent weight = A / 5

Option (a) 5 is the correct answer.
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
Explore Courses for NEET exam

Top Courses for NEET

A metal carbonate on heating is converted to metal oxide and is reduced to 60% of it's original weight. The equivalent weight of the metal is a) 5 b) 25 c) 60 d) 70?
Question Description
A metal carbonate on heating is converted to metal oxide and is reduced to 60% of it's original weight. The equivalent weight of the metal is a) 5 b) 25 c) 60 d) 70? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A metal carbonate on heating is converted to metal oxide and is reduced to 60% of it's original weight. The equivalent weight of the metal is a) 5 b) 25 c) 60 d) 70? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A metal carbonate on heating is converted to metal oxide and is reduced to 60% of it's original weight. The equivalent weight of the metal is a) 5 b) 25 c) 60 d) 70?.
Solutions for A metal carbonate on heating is converted to metal oxide and is reduced to 60% of it's original weight. The equivalent weight of the metal is a) 5 b) 25 c) 60 d) 70? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of A metal carbonate on heating is converted to metal oxide and is reduced to 60% of it's original weight. The equivalent weight of the metal is a) 5 b) 25 c) 60 d) 70? defined & explained in the simplest way possible. Besides giving the explanation of A metal carbonate on heating is converted to metal oxide and is reduced to 60% of it's original weight. The equivalent weight of the metal is a) 5 b) 25 c) 60 d) 70?, a detailed solution for A metal carbonate on heating is converted to metal oxide and is reduced to 60% of it's original weight. The equivalent weight of the metal is a) 5 b) 25 c) 60 d) 70? has been provided alongside types of A metal carbonate on heating is converted to metal oxide and is reduced to 60% of it's original weight. The equivalent weight of the metal is a) 5 b) 25 c) 60 d) 70? theory, EduRev gives you an ample number of questions to practice A metal carbonate on heating is converted to metal oxide and is reduced to 60% of it's original weight. The equivalent weight of the metal is a) 5 b) 25 c) 60 d) 70? tests, examples and also practice NEET tests.
Explore Courses for NEET exam

Top Courses for NEET

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev