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CBSE Class 10th Science
Guess Paper 2018-2019
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CBSE Class 10th Science
Guess Paper 2018-2019
TIME - 3 HR. | QUESTIONS – 27
General Instructions:
Marks: 80
(i) The question paper comprises of five sections – A, B, C, D and E. You are to attempt all the
sections.
(ii) All questions are compulsory.
(iii) Internal choice is given in sections B, C, D and E.
(iv) Question number 1 and 2 in Section – A are one mark questions. They are to be answered in
one word or in one sentence.
(v) Question number 3 to 5 in Section – B are two marks questions. These are to be answered in
about 30 words each.
(vi) Question number 6 to 15 in Section – C are three marks questions. These are to be answered
in about 50 words each.
(vii) Question numbers 16 to 21 in Section – D are 5 marks questions. These are to be answered
in about 70 words each.
(viii) Question number 22 to 27 in Section – E are based on practical skills. Each question in a
two marks question. These are to be answered in brief.
Section - A
Q.1.
Which part of alimentary canal receives bile from the liver?
Q.2.
What is the main cause of abundant coliform bacteria in the river Ganga?
Section – B
Q.3.
What happens when
(a) 𝐙𝐧𝐂𝐎𝟑 is heated in the absence of oxygen?
(b) A mixture of 𝐂𝐮𝟐 𝐎 and 𝐂𝐮𝟐 𝐒 is heated?
Q.4.
How does binary fission differ from multiple fission?
Q.5.
Light enters from air to glass having a refractive index of 2.0. What is the speed of
light in the glass? The speed of light in vacuum is 𝟑 × 𝟏𝟎𝟖 𝐦/𝐬.
OR
What do you mean by this statement “Diamond’s refractive index is 2.4”?
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