NTSE Stage-2 2013

As we all know, the selected students in Stage 1 of NTSE 2013 will have to give their second stage on 12th May, 2013.We have a quite a good time for our preparations.Board Exams will also end by 20th March for ICSE and 31st March for CBSE.So, we will have to concentrate on NTSE Stage 2 preparation.

I am providing some questions which are MUST practise for every student giving NTSE Stage-2.
So here I go:

1. The least distance of distinct vision for a youngadult with normal vision is about :-(1) 25 m (2) 2.5 cm (3) 2.5 m (4) 25 cm2. The commercial unit of electrical energy is :-(1) Joule (2) Watt(3) Watt hour (4) Kilowatt hour3. An electric bulb is rated 220 V and 100 W.When it is operated on 110 V, the powerconsumed will be :-(1) 100 W (2) 25 W (3) 75 W (4) 50 W4. An object weighs 60 N when measured on thesurface of the earth. What would be its weightwhen measured on the surface of the moon ?(1) 60 N (2) 10 N (3) 30 N (4) Zero5. A man with a box on his head is climbing up aladder. The work done by the man on the box is :-(1) Positive (2) Negative(3) Zero (4) Undefined6. An ammeter is always connected in ..... and avoltmeter in ...... The suitable words, in order,for the blanks are :-(1) Series; series(2) Parallel ; parallel(3) Parallel ; series(4) Series ; parallel7. An ice cube is floating in a glass of water. Whathappens to the water level when the ice melts?(1) Rises(2) Falls(3) Remains same(4) First rises and then falls8. Which of the following produces more severeburns ?(1) hot air (2) sun rays(3) boiling water (4) steam9. A fan produces a feeling of comfort during hotweather because :-(1) fan supplies cold air(2) our perspiration evaporates rapidly(3) our body radiates more heat in air(4) conductivity of air increases10. The echo will be heard if the original soundreflected by an obstacle reaches our ears after:-(1) 10 s (2) 5 s (3) 1 s (4) 0.1 s
28. The electronic configuration of an elementhaving atomic number 17 is :-(1) 1s2, 2s22p6, 3s23p6(2) 1s2, 2s22p6, 3s23p4, 4s1(3) 1s2, 2s22p6, 3s23p5(4) 1s2, 2s22p6, 3s23p2,4s24p129. Which of the following contains larger amountof atom ?(1) 3.5 g CO2 (2) 3.5 g NaCl(3) 3.5 g N2 (4) 3.5 g O230. In the reaction : N2(g) + 3H2(g)‡ˆˆˆ†ˆ 2NH3(g)the value of the equilibrium constant depends on:-(1) Volume of the reaction(2) Total pressure of the system(3) The initial concentration of N2 & H2(4) The temperature31. Which of the following molecules contains adouble bond :-(1) N2 (2) C2H4 (3) PH3 (4) CCl432. The chemical substance present in lime wateris :-(1) Calcium chloride (2) Calcium oxide(3) Calcium hydroxide (4) Calcium nitrate33. Which organic compound is used for theartificial ripening of fruits :-(1) Ethene (2) Ethane(3) Propane (4) All of the above34. From amongst following metals which metal ispoorest conductor of electricity :-(1) Pb (2) Ag (3) Hg (4) Al35. The pH value of pure water can be increased by:-(1) Adding an acid(2) Removing some water(3) Adding a base(4) None of the above36. If 13.69 = x , then1369 + 0.1369 + 0.001369 is equal to -(1) 10.01 x (2) 10.101 x(3) 10.11 x (4) 11.10 x37. A two digit positive number is such that theproduct of two digits is 24. When 45 is addedto the number, then the digits interchange theirplaces. Number is -(1) 46 (2) 38(3) 24 (4) none of these
56. Three friends Mr. White, Mr. Black & Mr. Redmet in a cafeteria. "It is remarkable that one ofus has white hair, another one has black hair& third one has red hair, though no one's namegives the colour of their hair", said the blackhaired person. "You are right", answered Mr.White, then(1) Mr. White's hair colour is black(2) Mr. Red's hair colour is black(3) Mr. Black's hair colour is red(4) Mr. Red's hair colour is red57. If perimeter of a certain sector of a circle isequal to half of the circle of which it is a part,then circular measure of the angle of sector is-(1)p2(2) p (3) p + 2 (4) p – 2