1. Which mirror is to be used to obtain a parallel beam of light from a small lamp?
Concave mirror
2. What is the Number of water molecules present in Mohr’s salt?
8
3. Which gland is responsible for the secretion of insulin?
Pancrease
4. The change in temperature of a body is 50°C. What is the change on Kelvin scale?
50 K
5. What is a good source of Vitamin ‘E’?
Fresh vegetable
6. Which are the important raw materials required in cement industry?
Limestone and clay
7. What is not the cause of low conductivity of electrolyte?
Ionization of salt
8. Epiphytes are plant which depends on other plants for which purpose?
Mechanical support
9. Cooking gas is a mixture of which gases?
Butane and propane
10. Which acid is produced when milk gets sour?
Lactic acid
11. What is Electric field intensity at a point a hollow charged spherical conductor?
Is zero
12. What is the most important requirement for the people of a flood hit area?
Inoculation against cholera
13. Which are the most commonly used chemicals in the artificial rain making or cloud seeding?
Silver Iodide (Agl)
14. Which hormone is responsible for the secretion of milk in mothers?
Lactogenic hormone
15. What happens, When water is heated from 0°C to 10°C the volume of water?
First decreases then increases
16. A vein is a vessel that carries blood which side?
Towards the heart
17. Which compound does not give a positive test in Lassaigne’s test for nitrogen?
Hydrazinc
18. What is in lichen symbiotic relationship between fungi and algae called?
Halotism
19. With which instrument can a sailor in a submarine see the objects on the surface of sea?
Periscope
20. Litmus paper used in laboratory from which obtained?
Lichen
21. Which acid is used in synthetic lemonade?
Citric acid
22. At absolute zero temperature, what will be the kinetic energy of the molecules?
Zero
23. Which is the instrument that measures air pressure?
Barometer
24. Middle ear is not found in snake. Through part do they receive sound?
Skin
25. By whom was the quantum theory first enunciated?
By Max Planck
26. Through which are the characters are transferred from parents to progeny?
DNA
27. With rise of boiling point of water, what will be the latent heat of steam?
Decreases
28. Which branch of biology deal with the study of heredity?
Genetics
29. If a proton of mass m is moving with velocity of light, how will its mass?
Unchanged
30. If we sprinkle common salt on an earthworm, why does it die?
Due to osmotic shock