CBSE BOARD X, asked by Ritikmall, 8 months ago

marking scheme for the below question
I want the marking scheme of 23rd question

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Answers

Answered by Anonymous
12

it is 1 mark for every part

Answered by drupen69
2

Answer:

0.5+1+0.5+1=3

Explanation:

This is a 3 marker question from the 2020 Science Question Paper.. I know since i also gave the exam. The first part of the question carries 0.5 marks and the answer is presbyopia

The second part of the question carries 1 mark and the answer is due to weakening of ciliary muscles or the diminishing flexibility of the eye lens

The third part of the question has 2 parts.

The name of the lense carries 0.5 marks and the answer is bifocal lens

The diagram of a bifocal lens is a representative one(as no such diagram was in the text book) and it carries 1 mark.. If you have just drawn a convex lens on bottom and concave on top you will get the marks...

Thanks a lot

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