Crude calcium carbide, CaC 2 , is made in an electric furna…

Chemistry Some Basic Concepts of Chemistry The Mole Concept Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 14, 2026

Crude calcium carbide, CaC 2 , is made in an electric furnace by the following reaction,

CaO + 3C CaC 2 + CO

The product contain 85% CaC 2 and 15% unreacted CaO.

1051.47 kg of CaO is to be added to the furnace charge for each 1000 kg of CaC 2 .

893.8 kg of CaO is to be added to the furnace charge for each 1000 kg of crude product.

708.2 kg of CaO is to be added to the furnace charge for each 1000 kg of CaC 2 .

910.3 kg of CaO is to be added to the furnace charge for each 1000 kg of crude product.

Text Solution

Verified by Experts

The correct answer is:

GO FOR SOLUTION

(a,b)

CaO(s) + 3C(s) CaC 2 (s) + CO(g)

Final product contain 85% CaC 2 & 15% CaO

Let mass of product is 100 g

∴ Mass of CaC 2 = 85 g

Mass of CaO = 15 g

Used mole of CaO = mole of CaC 2 produced =

∴ mass of CaO for producing 85 g CaC 2 = × 56 = 74.375 g.

∴ Initial total mass of CaO = 74.375 + 15 = 89.375.

85 g CaC 2 obtained from = 89.38 g CaO

∴ 1 g CaC 2 obtained from = g CaO

10 6 g CaC 2 obtained from = × 10 6 = 1051470 g

For 1000 kg CaC 2 requires = 1051.47 kg CaO.

100 g product requires CaO = 89.38 g

1 g product requires =

10 6 g product requires = × 10 6

For 1000 kg (crude) product = 893.8 kg CaO.

Previous Question Next Question

Get practice questions, solutions, and test series in one place.

Share your experience with this question and solution.

Send your comment, doubt, correction, or feedback to admin.

What students say about this solution

No reviews yet. Be the first to write a review.