Chapter : 1,6,10
Total Marks: 30
THE HB KAPADIA NEW HIGH SCHOOL
Std 10 Science
REVISION EXAM
Date : 11/12/21
Time : 1 Hr.
Section A
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•
Write the answer of the following questions. [Each carries 1 Mark]
1.
What is the chemical formula of marble ?
(A) Na2CO3
(B) CaCO3
(C) BaCO3
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(D) Ca(OH)2
2.
Define – Combination Reaction :
3.
True or False : Zinc and Lead are more active element than copper (Cu) therefore they displace
Cu from compounds of copper.
4.
Autotrophs forms ........ from CO2 and H2O in presence of chlorophyll and sunlight.
(A) protein
(B) carbohydrates
5.
Give function of bile juice.
6.
The wall of stomach is protected by ...........
7.
What is the focal length of a plane mirror ?
(A) infinity
(B) zero
8.
9.
(C) fats
(D) all of the above
(C) negative
(D) none of these
4
3
The focal length of a mirror is 50 cm, then its radius of curvature is ........... cm.
What is the speed of light in water ? For water n =
Section B
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•
Write the answer of the following questions. [Each carries 2 Marks]
10.
Explain Rancidity with example.
11.
Give an example of a double displacement reaction other than the one given in Activity 1.10.
12.
Explain : Nutrition in Amoeba with a labelled diagram.
13.
Explain by drawing ray diagram of position and type of image formed by convex lens when an
object is placed beyond 2F.
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Section C
•
Write the answer of the following questions. [Each carries 3 Marks]
14.
Consider the following three reactions.
Al2O3 + 2B ® B2O3 + 2A, 3CSO4 + 2B ® B2(SO4)3 + 3C, 3CO + 2A ® A2O3 + 3C
On the basis of following information answer the following questions –
(i) Which element is the most active ?
(ii) Which element is the least active ?
(iii) Which type of reaction is included in given question ?
15.
Explain breaking down of glucose molecule.
16.
A 2.0 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length
10 cm. The distance of the object from the lens is 15 cm. Find the nature, position and size of the
image. Also find its magnification.
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Section D
•
Write the answer of the following questions. [Each carries 4 Marks]
17.
Draw a diagram of schematic section of human heart and explain the working method Mechanism.
REVISION EXAM
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