english, maths, physics, chemistry, biology, reasoning ... · a hollow cylinder has a charge q...

ENGLISH, MATHS, PHYSICS, CHEMISTRY, BIOLOGY, REASONING (MENTAL ABILITY)

HORIZONMedica l|IIT-JEE|Foundat ions

(Divisions of Horizon Study Circle Pvt. Ltd.)

201816 December, 2018 (Sunday)

HORIZON ACADEMY The Institute for Doctors and Engineers

2HORIZON ACADEMY : B-3/41 A, YAMUNA VIHAR, WAZIRABAD ROAD, DELHI-53, (M) 9811139323, (O) 22922012H

Visit Us on facebook https://www.facebook.com/HorizonAcademy2003/

Email : [email protected]

Website : www.horizonacademy.co.in

https://www.facebook.com/HorizonAcademy2003/

mailto:[email protected]

http://www.horizonacademy.co.in

H1-16-12-18

HTHE-2018SET A

HORIZON TALENT HUNT EXAM - 2018SAMPLE PAPER FOR CLASS 12th STUDYING STUDENTS

Please read the instructions carefully, You are allotted 5 minutes specifically for this purpose

Write your Name and Roll No. in the space provided on the first page of this booklet.

DO

NO

T BR

EAK

TH

E SE

AL

WIT

HO

UT

BEI

NG

INST

RU

CTE

D T

O D

O S

O B

Y T

HE

INV

IGIL

ATO

R

Batch Code : 121

Test No : 01

HORIZONMedica l|I IT-JEE|Foundat ions

(Divisions of Horizon Study Circle Pvt. Ltd.)

H B-3/41A, YAMUNA VIHAR, WAZIRABAD ROAD, DELHI-53, (M) 9811139323, (O) 22922012HORIZON ACADEMY : 3

INSTRUCTIONSA. General

1. This booklet is your Question Paper. Do not break the seal of this booklet before being instructedto do so by the invigilator(s).

2. Blank spaces are provided in this booklet for rough work. No additional sheets will be providedfor this purpose.

3. Carrying mobile phones or any other electronic gadget / device, Blank papers, log tables,calculators, and cameras in any form are NOT allowed inside the examination hall.

4. Use HB pencil for darkening the bubbles on the (OMR) sheet.5. DO NOT TAMPER / MUTILATE WITH THE OMR SHEET.6. Don’t Talk / Communicate with any other examinees.7. Immediately after the prescribed examination time is over, the answer (OMR) sheet should be

returned to the invigilator.

B. Filling the OMR Sheet8. Sign. at the place provided on the Attendance Sheet that you have verified.9. Write your Name, Roll Number with Blue / Black pen in the boxes provided on the

OMR Sheet. Do not write any of this information anywhere else. Darken the appropriatebubble UNDER each digit of your Roll Number in such a way that the impression is created onthe bottom sheet.

C. Question Paper Format10. The question paper consists of 3 parts (Physics, Chemistry, Maths / Biology contains 60 multiple

choice questions. Each question has four choices (A), (B), (C) and (D) out of which ONLY ONEis correct.

D. Marking Scheme11. For each question you will be awarded 4 marks if you have darken the bubble corresponding to

the correct answer ONLY and zero (0) mark if no bubble(s) is/are darkened.12. THERE WILL BE NO NEGATIVE MARKING.

NAME : ____________________________________ ROLL NO : _______________________

HORISET-A Time : 11 2 M.M.: 240

Space for Rough Work


PHYSICS1. A hollow cylinder has a charge q coulomb within it. If is the electric flux

in units of volt-metre associated with the curved surface B, the flux linkedwith the plane surface A in units of V-m will be

(A)02

q (B) 3

(C)0

q

(D)0

12

q

2. If voltage across a bulb rated 220 volt-100 watt drops by 2.5% of its ratedvalue, the percentage of the rated value by which the power woulddecrease is(A) 20% (B) 2.5% (C) 5% (D) 10%

3. A galvanometer of resistance G is shunted by a resistance S . To keepthe main current in the circuit unchanged, the resistance to be put in serieswith the galvanometer is

(A)G

S+G (B)2S

S+G (C)SG

S+G (D)2G

S+G

4. A short bar magnet of magnetic moment 0.4 JT–1 is placed in a uniformmagnetic field of 0.16 T. The magnet is in stable equilibrium when thepotential energy is(A) 0.064 J (B) –0.064 J (C) zero (D) –0.082 J



5. An ac voltage is applied to a resistance R and an inductor L in series. If Rand the inductive reactance are both equal to 3, the phase differencebetween the applied voltage and the current in the circuit is

(A) 6

(B) 4

(C) 2

(D) zero

6. The magnetic flux through a circuit of resistance R changes by an amountof in a time ,t then the total quantity of electric charge Q that passesany point in the circuit during the time t is represented by

(A)1QR t

(B) QR

(C) Qt

(D) Q Rt

7. T he e lectr i c and the magnet ic f ie ld , associ ated w ith an e .m.wavepropagating along the +z axis, can be respresented by

(A) 0 0ˆ ˆ,E E i B B j

(B) 0 0

ˆ ˆ,E E k B B i

(C) 0 0ˆ ˆ,E E j B B i

(D) 0 0

ˆˆ,E E j B B k

8. A lens having focal length f and aperture of diameter d forms an image of

intensity I. Aperture of diameter 2d

in central region of lens is covered by

a black paper. Focal length of lens and intensity of image now will berespectively

(A) 4If and (B)

34 2f Iand

(C)34If and (D) 2 4

f Iand



9. In young’s double slit experiment, the slits are 2 mm apart and are

illuminated by photons of two wavelengths 1 12000Å and 2 10000Å .

At what minimum distance from the common central bright fringe on thescreen 2m from the slit will a bright fringe from one interference patterncoincide with a bright fringe from the other ?(A) 4 mm (B) 3 m (C) 8 mm (D) 6 mm

10. The wavelength e of an electron and p of a photon of same energy E are

related by

(A) p e (B)1

pe

(C) 2p e (D) p e

11. Ratio of longest wavelenghts corresponding to Lyman and Balmer seriesin hydrogen spectrum is

(A)729 (B)

931 (C)

527 (D)

323

12. The half life of a radioactive nucleus is 50 days. The time interval (t2 – t1)between the time t2 when 2/3 of it has decayed and the time t1 when 1/3of it had decayed is(A) 30 days (B) 50 days (C) 60 days (D) 15 days

13. The output (x) of the logic circuit shown in figure will be

(A) x = A.B (B) x A B (C) .x A B (D) .x A B



14. Two ideal diodes are connected to a battery as shown in the circuit. Thecurrent supplied by the battery is

(A) 0.75 A

(B) zero

(C) 0.25 A

(D) 0.5 A15. For the angle of minimum deviation of a prism to be equal to its refracting

angle, the prism must be made of a material whose refractive index

(A) lies between 2 1and (B) lies between 2 and 2(C) is less than 1 (D) is greater than 2

16. Three concentric spherical shells have radii a, b and c (a < b < c) and havesurface charge densities , , respectively. If vA, vB and vC denote thepotentials of the three shells, then, for c = a + b, we have(A) c B Av =v v (B) c B Av v v

(C) c B Av v v (D) c A Bv v v 17. A 12 cm wire is given a shape of a right angled triangle ABC having sides

3cm, 4 cm and 5 cm as shown in the figure. If resistance between two ends(AB, BC, CA) of the respective sides are measured one by one by amulti-meter. The resistance will be in the ratio

(A) 9 : 16 : 25

(B) 27 : 32 : 35

(C) 21 : 24 : 25

(D) 3 : 4 : 5



18. A circular coil ABCD carrying a current i is placed in a uniform magnetic

field. If the magnetic force on the segment AB is ,F

the force on the

remaining segment BCDA is :

(A) F (B) 3F

(C) 3F (D) F

19. An electron in the hydrogen atom jumps from excited state n to the groundstate. The wavelength so emitted illuminates a photo sensitive materialhaving work function 2.75 eV. If the stopping potential of the photoelectronis 10 V, then the value of n is(A) 2 (B) 3 (C) 4 (D) 5

20 The binding energy per nucleon of 37 Li and 4

2 He nuclei are 5.60 MeV and

7.06 MeV respectively. In the nuclear reaction7 1 43 1 2Li H He Q

The value of energy Q released is(A) 19.6 MeV(B) –2.4 MeV(C) 8.4 MeV(D) 17.3 MeV



CHEMISTRY21. The correct statement regarding RNA and DNA, respectively is

(A) the sugar component in RNA is an arabinose and the sugarcomponent in DNA is ribose

(B) the sugar component in RNA is 2’-deoxyribose and the sugarcomponent in DNA is arabinose

(C) the sugar component in RNA is arabinose and the sugar componentin DNA is 2’-deoxyribose

(D) the sugar component in RNA is ribose and the sugar component inDNA is 2’-deoxyribose

22. Which one given below is a non-reducing sugar ?(A) Glucose (B) Sucrose (C) Maltose (D) Lactose

23. When copper is heated with conc. HNO3 it produces(A) Cu(NO3)2, NO and NO2 (B) Cu(NO3)2 and N2O(C) Cu(NO3)2 and NO2 (D) Cu(NO3)2 and NO

24. The nucleic acid base having three possible binding sites is(A) thymine (B) uracil (C) guanine (D) adenine

25. Choose the correct statements.I. Cs+ is more highly hydrated than the other alkali metal ions.II. Among the alkali metals Li, Na, K and Rb, lithium has the highest

melting point.III. Among the alkali metals only lithium forms a stable nitride by direct

combination(A) I, II and III (B) I and II(C) I and III (D) II and III



26. A compound is formed by two elements X and Y. Atoms of the element Y(as anions) make ccp and those of the element X (as cations) occupy allthe octahedral voids. What is the formula of the compound ?(A) XY (B) X 2Y (C) XY2 (D) X4Y3

27. Zn gives H2 gas with H2SO4 and HCl but not with HNO3 because(A) Zn acts as an oxidising agent when reacts with HNO3

(B) HNO3 is weaker acid than H2SO4 and HCl(C) in electrochemical series Zn is above hydrogen

(D) 3NO ion is reduced in preference to hydronium ion.

28. What will be the normality of a solution obtained by mixing 0.45 N and0.60 N NaOH in the ratio 2 : 1 by volume ?(A) 0.4 N (B) 0.5 N (C) 1.05 N (D) 0.15 N

29. Which of the following does not represent the correct order of the propertyindicated ?(A) Sc3+ > Cr3+ > Fe3+ > Mn3+ : Ionic radii(B) Sc < Ti < Cr < Mn : Density(C) Mn2+ > Ni2+ < Co2+ < Fe2+ : Ionic radii(D) FeO < CaO > MnO > CuO : Basic nature

30. In the following reaction,2 23 / / /

7 8Cl Br Fe Zn HClC H A B C

The compound C is(A) o-bromotoluene(B) m-bromotoluene(C) p-bromotoluene(D) 3-bromo-2-4, 6-trichlorotoluene



31. (CH3CO)2O Aspirin

The chemical required for this conversion is

(A) acetylsalicylic acid (B) salicylic acid

(C) phthalic acid (D) benzoic acid

32. The colourless species is

(A) VCl3 (B) VOSO4

(C) Na3VO4 (D) [V(H2O)6]SO4.H2O

33. A solution of sulphur dioxide in water reacts with H2S precipitatingsulphur. Here sulphur dioxide acts as

(A) an oxidising agent (B) a reducing agent

(C) an acid (D) a catalyst

34. The compound which is not isomeric with diethyl ether is :

(A) n-propyl methyl ether

(B) butan-1-ol

(C) 2-methylpropan-2-ol

(D) butan-2-one

35. A solid is made of two elements X and Z. The atoms Z are in ccparrangement while the atom X occupy all the tetrahedral sites. What isthe formula of the compound ?

(A) XZ (B) XZ2 (C) X2Z (D) X2Z3

36. The correct decreasing order of acidic character is(A) HClO > HBrO > HIO (B) HIO > HBrO > HClO(C) HBrO > HIO > HClO (D) HClO > HIO > HBrO



37. In acidic medium 4MnO is an oxidising agent.2

4 28 5 4 .MnO H e Mn H O

If H+ ion concentration is doubled, electrode potential of the half-cell2

4 , /MnO Mn Pt will

(A) increase by 28.46 mV (B) decrease by 28.46 mV(C) increase by 14.23 mV (D) decrease by 142.30 mV

38. Which statement is not correct about lithium, the first member of alkalimetals ?(A) Molten lithium is the most reactive substance.(B) It is the only element among alkali metals that reacts directly with

N2 at rom temperature.(C) Li+ ion has smallest ionic radii in an aqueous solution.(D) LiCl has covalent character.

39. Amongst the following which are true for SN2 reaction ?(i) The rate of reaction is independent of the concentration of the

nucleophile.(ii) The nucleophile attacks the carbon atom on the side of the molecule

opposite to the group being displaced.(iii) The reaction proceeds with simultaneous bond formation and bond

rupture.(A) (i), (ii) (B) (i), (iii)(C) (i), (ii), (iii) (D) (ii), (iii)

40. Sulphur reacts with chlorine in 1 : 2 ratio and forms X. X on hydrolysisgives a sulphur compound Y. What is the hybridised state of central atomin the anion of Y ?(A) sp (B) sp3 (C) sp2 (D) sp3d



MATHEMATICS

41. If 2

2A

and |A|3 = 125, then the value of is :

(A) ± 1 (B) ± 2 (C) ± 3 (D) ± 542. If the system of the equations :

x – ky – z = 0, kx – y – z = 0, x + y – z = 0has a non-zero solution, then the possible values of k are :(A) –1, 2 (B) 1, 2 (C) 0, 1 (D) –1, 1

43. A function f : [0, ) [0, ) defined as ( )1

xf xx

is :

(A) one-one and onto (B) one-one but not onto(C) onto but not one-one (D) neither one-one nor onto

44. The value of the parameter for which the function f(x) = 1 + x, = 0, isthe inverse of itself is :(A) –2 (B) –1 (C) 1 (D) 2

45. The function f : R{0} R given by :

21 2( )

1xf xx e

can be made continuous at x = 0 by defining f (0) as :(A) –1 (B) 0 (C) 1 (D) 2

46.2

2d xdy

equals :

(A)12

2

d ydx

(B)1 32

2

d y dydx dx

(C)22

2d y dydx dx

(D)32

2d y dydx dx



47. If 1 1

|| , 0( ) ,0, 0

x xxe xf xx

then f (x) is :

(A) continuous for all x but not differentiable at x = 0(B) neither differentiable nor continuous at x = 0(C) discontinuous everywhere(D) continuous as well as differentiable for all x

48. Angle between the tangents to the curve y = x2 – 5x + 6 at the points (2, 0)and (3, 0) is :(A) /2 (B) /3 (C) /6 (D) /4

49. The function f (x) = tan–1 (sin x + cos x) is an increasing function in :

(A) ,2 4

(B) 0,

2

(C) ,2 2

(D) ,

4 2

50. The greatest value of f (x) = (x + 1)1/3 – (x – 1)1/3 on [0, 1] is :

(A) 1 (B) 2 (C) 3 (D)13

51. 1/5 4/5 1/2(1 )dx

x x equals :

(A) 4/51 x c (B)4

4/5 1/25 (1 )x x c

(C) 4/55 12

x c (D) none of these



52. The value of 2cos , 0, is :

1 xx dx a

a

(A) 2

(B) a (C) 2 (D) a

53. The value of 2/2

0

(sin cos )1 sin 2x xI dx

x

is :

(A) 0 (B) 1 (C) 2 (D) 354. The area bounded by the curves :

y = |x| – 1 and y = –|x| + 1 is :

(A) 1 (B) 2 (C) 2 2 (D) 4

55. The solution of the equation 2

22 is:xd y e

dx

(A) 214

xe (B) 214

xe cx d

(C) 2 214

xe cx d (D) 214

xe cx d

56. The image of the point (–1, 3, 4) in the plane :x – 2y = 0 is

(A)17 19, , 43 3

(B) (15, 11, 4)

(C)17 19, ,13 3

(D)9 13, , 45 5



57. The plane, which passes through the point (3, 2, 0) and the line 63 41 5 4

yx z

is :(A) x – y + z = 1 (B) x + y + z = 5(C) x + 2y – z = 1 (D) 2x – y + z = 5

58. For any vector ,a the value of

2 2 2ˆˆ ˆ( ) ( ) ( )a i a j a k is equal to :

(A) 2a (B) 23a

(C) 24a (D) 22a

59. The probability that A speaks truth is 4 ,5 while the probability for B is

3 .4 The

probability that they contradict each other when asked to speak on a fact is :

(A)3

20 (B)15 (C)

720 (D)

45

60. A fair die is tossed eight times. The probability that a third six is observed on the8th throw is :

(A)7 5

27

56

C

(B)7 5

28

56

C

(C)7 5

26

56

C

(D) None of these



BIOLOGY

41. Which part of the plant contains sporogenous tissue ?

(A) Pollen (B) Microspores

(C) Young anther (D) Stamen

42. The common terminal duct of the reproductive and urinary system in thehuman male is

(A) urethra (B) ureter

(C) vasa deferens (D) vasa efferentia

43. Mendel conducted hybridization experiments on garden peas for

(A) 7 years (B) 6 years (C) 5 years (D) 4 years

44. Which of the following is not a character of cancerous cells in our body ?

(A) Contact inhibition (B) Neoplasia

(C) Metastasis (D) Inability for differentiation

45. The breakdown of detritus into small particles by detrivores is called

(A) leaching (B) humification

(C) catabolism (D) fragmentation



46. Which compounds were used by Miller in his experiment for obtainingamino acids and other organic substances ?

(A) Ammonia, methane, hydrogen and water vapour

(B) Carbon dioxide water vapour and carbon dioxide

(C) Ammonia, methane and carbon dioxide

(D) Methane, ammonia, water vapour and hydrogen cyanide

47. The structure of E. coli chromosomal DNA is

(A) double stranded, right handed and circular

(B) single stranded, right handed and circular

(C) double stranded, left handed and linear

(D) double stranded, left handed and circular

48. Estrogen is secreted by

(A) corpus luteum (B) Grafian follicle

(C) germinal epithelium of ovary (D) pituitary gland

49. Development of embryo from a cell of embryo sac other than egg is anexample of

(A) apospory (B) apogamy

(C) adventive embryony (D) parthenogenesis

50. Filiform apparatus is characteristic of

(A) synergids (B) egg

(C) anther wall (D) antipodal cells



51. Genetic drift operates only in

(A) larger populations (B) Mendelian populations

(C) island populations (D) smaller populations

52. Human evolution occured in

(A) Africa and America (B) Africa and Asia

(C) Asia and Australia (D) America and Australia

53. Which of the following can be controlled by using biopesticides ?

(A) Insects (B) Diseases

(C) Weeds (D) All of these

54. Domestication of honeybee is called

(A) sericulture (B) apiculture

(C) tissue culture (D) pisciculture

55. Transfer of DNA bands from an agarose gel to a nitrocellulose or nylon membraneis referred to as

(A) western blotting (B) northern blotting

(C) eastern blotting (D) Southern blotting

56. Agrobacterium tumefaciens contains a large plasmid, which induces tumour inthe plants. It is termed as

(A) Ti plasmic (B) Ri plasmic

(C) recombinant plasmid (D) Shine Dalgarno sequence



57. Which of the following is true for National Park ?

(A) Tourism is allowed in buffer zone

(B) No human activity is allowed

(C) Hunting is allowed

(D) Cattle grazing is allowed in buffer zone

58. Which ecological pyramid can never occur in an inverted form ?

(A) Pyramid of number (B) Pyramid of biomass

(C) Pyramid of energy (D) Pyramid of species richess

59. Induced abortion is also called

(A) STD (B) MTP (C) IUD (D) PIA

60. The pathogen Haemophilus influenzae is responsible for the disease

(A) influenza (B) pneumonia

(C) plague (D) diphtheria

PHYSICS1. D2. C3. D4. B5. B6. B7. A8. C9. D10. C11. C12. B13. A14. D15. B16. D17. B18. A19. C20. D

CHEMISTRY21. D22. B23. C24. C25. D26. A

27. D28. B29. A30. B31. B32. C33. A34. D35. C36. A37. A38. C39. D40. BMATHEMATICS

41. C42. D43. B44. B45. C46. D47. A48. A49. A50. B51. C52. A53. C


HORIZON ACADEMY (Class - 12) The Institute for Doctors and Engineers

54. B55. B56. D57. A58. D59. C60. B

BIOLOGY41. C42. A43. A44. A45. D46. A47. A48. B49. B50. A51. D52. B53. D54. B55. D56. A57. B58. C59. B60. B

english, maths, physics, chemistry, biology, reasoning ... · a hollow cylinder has a charge q...

Documents