Cbse '- Class X - Science Worksheet - Byju'S, 2013
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11CBSE – CLASS -X -SCIENCE -2013
General Instructions:
(i)
The question paper comprises of two Sections, A and B. You are to attempt both the
sections.
(ii)
All questions are compulsory.
(iii)
All questions of Section-A and all questions of Section-B are to be attempted separately.
(iv)
Question numbers 1 to 3 in Section-A are one mark questions. These are to be answered in
one word or in one sentence.
(v)
Question numbers 4 to 7 in Section-A are two mark questions. These are to be answered in
about 30 words each.
(vi)
Question number 8 to 19 in Section-A are three marks questions. These are to be answered
in about 50 words each.
(vii)
Question numbers 20 to 24 in Section-A are five marks questions. These are to be answered
in about 70 words each.
(viii)
Question numbers 25 to 42 in Section-B are multiple choice questions based on practical
skills. Each question is a one mark question. You are to select one most appropriate
response out of the four provided to you.
Section A
Q1 How many vertical columns are there in the modern periodic table and what are they called?(1)
Q2 What is speciation? (1)
Q3 Why biodegradable and non-biodegradable wastes should be discarded in two separate dust
bins? (1)
Q4 “The chromosomes number of the sexually reproducing parents and their offspring is the same.”
Justify this statement. (2)
Q5 “A ray of light incident on a rectangular glass slab immersed in any medium emerges parallel to
itself.” Draw labeled ray diagram to justify this statement. (2)
Q6 We often observe domestic waste decomposing in the bylanes of residential colonies. Suggest
ways to make people realize that the improper disposal of waste is harmful to the environment. (2)
Q7 List and explain any two advantages associated with water harvesting at community level. (2)
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