1. 105 goats, 140 donkeys and 175 cows have to be taken across a river. there is only one boat which will have to make many trips in order to do so. the lazy boatman has his own conditions for transporting them. He insists that he will take the same number of animals in every trip and they have to be of same kind. He will naturally like to take the largest possible number each time.
the number of animals went in each trip is _________.
(a) 75 (b) 35 (C) 154 (D) 63
2. in the given diagram, the circle stands for College Professors, the triangle stands for Surgical Specialists, and medical Specialists are represented by the rectangle. Surgical Specialists who are also medical Specialists but not College Professors are represented by _____.
5. In the given figure, if DE BC = 2
6. Values of p and q for which the given system of linear equations have infinite number of solutions are ______.
7. anita, armaan, Narayani, Harsha and ashish went on some days out during half term. the only one who went out bowling was Harsha. No-one except Narayani and ashish went to the park. anita, armaan and Narayani watched a film together at the cinema. Everyone except Harsha went swimming. The only child who did not visit the play centre was armaan. Who visited the most places?
(a) Anita (b) Armaan (C) Ashish (D) Narayani
8. along a road lie an odd number of stones placed at intervals of 10 metres. these stones have to be assembled around the middle stone. a person can carry only one stone at a time. a man carried the job with one of the end stones by carrying them in succession. in carrying all the stones he
3 possible number is ______.
(a) 8200902 (b) 8200920 (C) 8200680 (D) None of these
12. In the given figure, AB = CD = 2BC = 2BP = 2CQ. in the middle, a circle with radius 1 cm is drawn.
In the rest of the figure all are the semicircular arcs. The perimeter of the whole figure is ____.
(a) 4p
13. if A be the area of a right triangle and b one of the sides containing the right angle, the length of the altitude on the hypotenuse is _____. current flows through the two wires. Which statement concerning this situation is true?
(a) The potential difference across the two wires is the same, but the current through each wire is different.
(b) The potential difference across the two wires is the same, and the current through each wire is same.
(C) The potential difference across the two wires is the different, but the current through each wire is same.
(D) Both the potential difference across the two wires and current through each wire is different.
15th NSO - SET A
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17. a mirror is broken into two parts and these parts are separated by a distance of 1 cm as shown in figure. The focal length of the mirror is 10 cm. Find the location of the images (in cm), formed by the two parts of mirror. the object is midway between the two principal axes.
(a) Its velocity is constant (b) Its acceleration is constant (C) Its kinetic energy is conserved (D) None of these
19. match Column-i with Column-ii and mark the correct option from the codes given below. shown in the given figure. Which of the following statements is correct?
(a) The charge is positive and slowing down.
(b) The charge is negative and slowing down.
(C) The charge is positive and speeding up.
(D) The charge is negative and speeding up.
21. Which of the following statements is/are correct?
(i) the distance between two consecutive compressions is called frequency of sound wave.
(ii) Sound propagates as pressure variations.
(iii) Compressions are narrower in a high pitched sound.
(a) (i) only (b) (ii) only (C) (iii) only (D) (ii) and (iii)
22. most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the sun's energy?
(a) Geothermal energy (b) Wind energy (C) Fossil fuels (D) Biomass
23. the number of alphabetical capital letters such as A, B, C, D, which are not laterally inverted by a plane mirror is ______.
(a) 6 (b) 7 (C) 11 (D) 13
24. two metallic wires A and B are connected in series. Wire A has length l and radius r, while wire B has length 2l and radius 2r. If both the wires are of same material then find the ratio of the total resistance of series combination to the resistance of the wire A.
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25. Read the given statements and mark the correct option.
Statement 1 : a body can have acceleration even if its velocity is zero at a given instant.
Statement 2 : a body is momentarily at rest when it reverses its direction of velocity.
(a) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
(b) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
(C) Statement 1 is true but statement 2 is false. (D) Both statements 1 and 2 are false.
26. Consider a planet in some system which has a mass double the mass of the earth and density found that the solution now weighed 130 g. the amount of water evaporated during heating is _____.
(a) 25 g (b) 170 g (C) 195 g (D) 105 g
28. Which of the following processes does not involve either oxidation or reduction?
(a) Formation of slaked lime from quick lime (b) Heating mercuric oxide (C) Formation of manganese chloride from manganese oxide
(D) Formation of zinc from zinc blende
29. 12 g of X2O5, an oxide of element X contains 7.2 g of X. How many moles of X does 7.2 g of the element contain?
(a) 6 (b) 0.5 (C) 0.2 (D) 4.5
30. a large volume of copper(ii) sulphate solution is left in an iron container overnight.
identify the correct statement for above reaction.
(a) The solution evaporates completely and some copper(II) sulphate crystals are left behind.
(b) The part of the container in contact with the solution is coated with copper.
(C) Some fine iron particles are formed in the solution.
(D) Atmospheric oxygen reacts with the copper(II) sulphate to give black copper(II) oxide.
31. Naturally occurring argon (ar) consists of three isotopes, the
33. an ion m3+ contains 10 electrons and 14 neutrons. element m has valency equal to the valency of an other element X which has five electrons less than Ar in its outermost shell. Identify the elements m and X.
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(a) Alcohols Carboxylic Acids Esters
(b) Alcohols Esters Carboxylic Acids
(C) Carboxylic Acids Alcohols Esters (D) Carboxylic Acids Esters Alcohols
35. When sodium hydroxide is added to ferric chloride solution, a reddish brown precipitate is formed.
the precipitate is separated from the mixture by the process of __________.
(a) Evaporation (b) Sublimation (C) Fractional distillation (D) Filtration 36. Study the given table carefully.
Direction (Q. nos. 37 & 38) : the given graph represents the heating curve of a substance (solid) which is heated at a constant rate over a period of time. Observe the graph carefully and answer the question.
37. On the heating curve diagram, the section representing liquid only is
(a) PQ (b) QR
(C) RS (D) ST
38. identify the process that takes place during line segment St of the heating curve.
(a) Melting (b) Sublimation (C) Evaporation (D) Vaporisation 39. mature sieve tube elements are devoid of ______.
(a) Nucleus (b) Cytoplasm (C) Protein (D) Mitochondria
40. match Column-i with Column-ii and select the correct option from the codes given below.
Column-i Column-ii
(a) thallophyta (i) Marsilea
(b) bryophyta (ii) Pinus
(c) Pteridophyta (iii) Ulothrix
(d) Gymnospermae (iv) Ficus
(e) angiospermae (v) Funaria
(a) (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv), (e)-(v) (b) (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv), (e)-(v) (C) (a)-(i), (b)-(v), (c)-(iii), (d)-(ii), (e)-(iv) (D) (a)-(iii), (b)-(v), (c)-(i), (d)-(ii), (e)-(iv) 41. Given below are statements about five types of fishes P, Q, R, S and T.
(i) P is surface feeder. (ii) Q feeds in the middle zone of the pond.
7 42. Fill in the blanks and select the correct option.
(i) _____ disease continues for many days and causes long term effect on the body.
(ii) _____ disease continues for a few days and causes no long term effect on the body.
(iii) antibiotics commonly block biochemical pathways important for the growth of _____.
(iv) Sleeping sickness is caused by _____ and kala-azar is caused by _____.
(i) (ii) (iii) (iv) (a) Chronic Acute Bacteria Leishmania, Trypanosoma (b) Acute Chronic Virus Leishmania, Trypanosoma (C) Chronic Acute Bacteria Trypanosoma, Leishmania (D) Acute Chronic Virus Trypanosoma, Leishmania
43. a farmer regularly sprayed insecticides on his crops throughout the cropping season. the insecticides get washed off into a nearby lake where they were absorbed by the producers of the given food made in each of them. One of the potato tuber was boiled while the other one was not. the cavities in both tubers were filled with distilled water and they were then placed in petri-dishes containing 1m sucrose solution. the results are shown in the given figures.
Select the correct statement regarding this.
(a) Water level decreased in the cavity of boiled potato tuber due to evaporation. a potted plant into a flask containing potassium hydroxide solution. He fixed another leaf 'B' of the plant into a flask containing water and wrapped the flask with a piece of black cloth. the plant was left in sunlight. after 6 hours he detached and tested both leaves for starch. Which of the
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47. Correct the following statements by replacing the terms underlined (wherever necessary) and select the correct option.
(i) the part of human brain which regulates heart beat is called cerebrum.
(ii) Chemotropism is directional movement.
(iii) the centre for sexual behaviour is situated in medulla oblongata.
(iv) the plant hormone named after the fungus causing bakane disease is iaa.
(v) Centre for hunger and thirst is located in diencephalon.
(i) (ii) (iii) (iv) (v)
(a) Hypothalamus Tropic Cerebrum Auxin Diencephalon
(b) Medulla oblongata Directional Hypothalamus Gibberellin Diencephalon
(C) Hypothalamus Tropic Cerebrum Auxin Metencephalon
(D) Medulla oblongata Directional Hypothalamus Gibberellin Metencephalon 48. Which labelled parts in the given figure produce and store sperms
respectively?
(a) S and Q
(b) P and R (C) S and R (D) R and Q
49. Given below are four statements (a – d) each with one or two blanks. Select the option which correctly fills up the blanks in any two of these statements.
(a) Wings of butterfly and birds look alike and are the results of ___(i)__ evolution.
(b) Vermiform appendix is a ___(i)__ organ and an ___(ii)__evidence of evolution.
(c) Archaeopteryx shows ___(i)__ link between two different groups of organisms.
(d) according to Darwin evolution took place due to ___(i)__ and ___(ii)__ of the fittest.
(a) (d) – (i) mutations, (ii) survival (b) (a) – (i) divergent
(a) – (i) convergent (b) – (i) rudimentary, (ii) anatomical
(C) (b) – (i) vestigial, (ii) anatomical (D) (c) – (i) connecting
(c) – (i) missing (d) – (i) small variations, (ii) multiplication
50. The given figure shows four food chains with human at the top. Which two of these chains supply maximum amount of energy to the human?
(a) P and Q
(b) P and S (C) Q and R (D) Q and S
SPaCe FOR ROUGH WORK 15th NSO - SET A