21. Let an electric current of 1.5 A flow through an incandescent lamp in a circuit. What is the amount of charge that flows through it in 10 ms?
(a) 0.015 C
(b) 0.15 C
(c) 1.5 c
(d) 15 C

22. Which one among the following is not a renewable energy source?
(a) Solar
(b) Wind
(c) Nuclear
(d) Hydroelectric

23. Which one of the following is not a function of chlorophyll?
(a) Splitting of water
(b) Absorption of photon
(c) Oxidation of carbohydrate
(d) Conversion of light energy into chemical energy

24. Which one of the following statements about life processes in single-celled organisms is not correct?
(a) They require separate organ for food uptake.
(b) Separate organ is not needed for respiration.
(c) Waste of excretory material is produced by these organisms.
(d) They remain in contact with external environment.

25. Which one of the following organisms does not possess notochord at any stage of its life cycle?
(a) Holothuria
(b) Herdmania
(c) Exocoetus
(d) Salamander

26. Which one of the following pairs is not correctly matched?
(a) Positively phototropic: Shoot
(b) Positively geotropic : Root
(c) Chemotropic : Pollen tube
(d) Hydrotropic : Flower

27. Which one of the following metals does not react with oxygen, water or acids?
(a) Na
(b) Cu
(c) Fe
(d) Au

28. Which one of the following metals produces hydrogen with cold water?
(a) Silver
(b) Sodium
(c) Copper
(d) Iron

29. Manganese is extracted by heating manganese dioxide with aluminium powder. Which one of the following statements with regard to the reaction is correct?
(a) The reaction is exothermic.
(b) The reaction is endothermic.
(c) Manganese is produced as a solid.
(d) Manganese is more reactive than aluminium.

30. Which one of the following properties decreases across the periodic table from left to right and increases from top to bottom?
(a) Ionization energy
(b) Electron affinity
(c) Electronegativity
(d) Atomic radius

31. Which one of the following statements about production possibility frontier is not correct?
(a) The production possibility frontier slopes downwards to the right as the resources are limited.
(b) The different combinations of various goods and services given the available resources and technology are denoted by the production possibility frontier.
(c) Any point on or inside the production possibility frontier is attainable under the existing technology and resources.
(d) On the production possibility frontier, the output of one commodity can be increased without changing the output of another commodity.

32. How is the magnitude of price elasticity for an individual good determined?
1. By the degree to which the good is a necessity or luxury
2. By the extent to which substitutes are available
3. By the rate of income growth in the economy
4. By the relative importance of the good in the consumer’s budget
Select the correct answer using the code given below.
(a) 1, 2 and 3
(b) 1 and 4 only
(c) 1, 2 and 4
(d) 3 and 4

33. Which one of the following functions as an automatic stabilizer in the context of fiscal and monetary policies of an economy?
(a) Personal income tax
(b) Reverse repo rate of bank
(c) Open market operation
(d) Bond price

34. Broadly both birth and death rates are low in which one of the following stages of demographic transition model?
(a) High stationary stage
(b) Early expanding stage
(c) Late expanding stage
(d) Low stationary stage

35. Which one of the following is a pull factor for migration?
(a) Natural disaster
(b) High wage
(c) Housing shortage
(d) Low income

36. What is the depression at the top of a volcano following a volcanic eruption called?
(a) Chamber
(b) Vent
(c) Cinder
(d) Crater

37. In order to find out the absolute location of a place on the map, which of the following will be required?
(a) Latitude of the place alone
(b) Longitude of the place alone
(c) Both latitude and longitude of the place
(d) Neither latitude nor longitude of the place

38. The speed of the wind is measured by
(a) wind vane
(b) wind rose
(c) barometer
(d) anemometer

39. In the course of a river, in time, which one of the following features is formed when the old meander is closed off by deposition?
(a) Pothole
(b) Levee
(c) Oxbow lake
(d) Flood plain

40. Most of the mature Harappan sites in the region of Cholistan had been abandoned during
(a) C. 2250 BCE
(b) C. 2000 BCE
(c) C. 1800 BCE
(d) C. 1700 BCE