Question

General Instructions:
1.
The question paper carries 2 sections.
2. Section A has 15 questions of 3 mark each.
3.
Section B has 3 questions of 5 mark each.
4.
Internal choice is provided in both section A and B.
SECTION - A
1.
2.
3.
4.
5.
6.
Why is diffusion insufficient to meet the oxygen requirements of multi-
cellular organisms like humans?
[3]
What is the role of acid in the stomach?
[31
What are the advantages of sexual reproduction over asexual reproduction?
OR
What is the role of seminal vesicles and the prostate glands in male
reproductive system?
[3]
Why should curd and sour substances not be kept in brass and copper
vessels?
[3]
What is the importance of pH in everyday life?
OR
Plaster of Paris should be stored in a moisture proof container. Why? [3]
What does one mean by exothermic and endothermic reactions? Give
examples.
[3]
Write down three main differences between the physical properties of metals
and Non-Metals.
[3]
What is the difference between cation and anion.
[3]
Describe the structure and functioning of Nephron.
[3]
Explain the Sexual reproduction in flowering plants.
[3]
What is the role of fuse used in series with any electrical appliances?
Why should a fuse with the defined rating not be replaced by one with the
larger rating?
[3]
2 bulbs of 100 watt each, 4 fans of 200 W each are used for 5 hours daily in
month of July and also the cost of one unit is 5 rupees.
[3]
List the properties of magnetic lines of force.
[3]
7.
8.
9.
10.
11.
12.
13.​

Answer 1

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