1.Silk worms feed on
-Mulberry leave
2.What is the product formed when sodium
bicarbonate is heated by- Sodium Carbonate
3.A wide inlet of the sea usually concave in shape,
is termed as a- Bay
4.The sexual reproductive organs of aspergillus
are- Antheridium and Oogonium
5.Stars twinkle but planets do not twinkle because
- they are nearer to the earth and hence we
receive a greater amount of light and therefore minor variations in intensity
are not noticeable.
6.Which of the following is true about X-rays –
1)travel with the speed
of light
2) Can be reflected or refracted
3) can affect photographic plates
2) Can be reflected or refracted
3) can affect photographic plates
And Which is not true - have
low penetrating power
6. Which one of the following weeds is effective in
controlling water pollution caused by industrial effluents – Parthenium
7. Sullage water is - Waste
water released from kitchen
8. The most pure form of carbon is – Anthracite
9. Carbon gives hardness to stainless
steel.
10. Phloem is responsible for transport of
food and other substances in plants.
11. The washing machine works on the principle
of - Centrifugation.
12. Which lobe of human brain is associated with
hearing- temporal lobe.
The brain is divided into distinctive lobes. The
temporal lobe is located behind your ears and extends to both sides of the
brain. The temporal lobe is involved in vision, memory, sensory input,
language, emotion, and comprehension. The temporal lobe processes
memories, integrating them with sensations of taste, sound, sight and touch.
13. Activated Charcoal is used to remove colouring
matter from pure substances by_Adsorption
14. Lead sulphate - is not soluble in
water.
15. Chernobyl disaster is the result of pollution
by - Radioactive waste
16. Which of the following caused radioactive
pollution along the coast of Kerala – Thorium
17. In mammals, an important role of excretion is
played by – Kidneys
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