Akash Medical

Regd. Office : Office : Aakash Tower, Plot No.-4, Sec-11, MLU, Dwarka, New Delhi-110075 Ph.: 011-47623417 / 423 Fax : 011-47623472

ONLINE TEST (Based on PMT Pattern)

for

Nurture X DLP-2012 HINTS & SOLUTIONS

PHYSICS 1.

Answer (3)

V final = 2.

2·q ΔV m

Answer (3) V B – – V V A = = ∴

W AB Q

, where Q Q = = ne

Q = Q = 100 × 1.6 × 10 –19 = 1.6 × 1017

∴

W AB = (V ( V B – V A) 1.6 × 10 –17 = 14 × 1.6 × 10 –17 = 2.24 × 10 –16 J

3.

Answer (3) Conceptual

4.

Answer (1) = 2V, R eq = 20 V = V

5.

Ω,

I =

V R eq

Answer (1) Solve by using series and parallel method.

Regd.. Office Office : Aaka Aakash sh Towe owerr, Plot No. 4, Secto Sector-1 r-11, 1, Dwa Dwarka, rka, New Del Delhihi-75 75 Ph. Ph.:: 01 011-4 1-47623 7623417 417/23 /23 Fax : 47623472 Aakash Foundations - Regd - 10 -

Hints & Solutions - Online Test on PMT Pattern

6.

Answer (4) R 1 = 10

Ω,

R 2 = ?

R ∝ l 2 ⇒ 7.

Class-X

1

=

2

=+

R 1

 

=

10

11 10

2

1

=

⇒

2

R 2

2

R 2 = 12.1

Ω

Answer (1) Given circuit can be redrawn as,

6Ω 1A 1A 3 Ω

A

2A 8.

3Ω 6V

Answer (1) By using conservation of charge.

9.

Answer (1) Energy consumed = 500 × 10 × 30 Wh = 150000 Wh = 150 kWh

10. Answer (3) In household circuit bulbs are connected in parallel. 11.

Answer (4) By using Fleming left hand rule.

12. Answer (1)

r =

mv qB

13. Answer (3) Conceptual. 14. Answer (4) By using ampere swimming rule. 15. Answer (1) Conceptual. 16. Answer (3) Conceptual. 17. Answer (4) Using maxwell right hand thumb rule. 18. Answer (4) Fleming left hand rule. Aakash Foundations - Regd. Office : Aakash Tower, Plot No. 4, Sector-11, Dwarka, New Delhi-75 Ph.: 011-47623417/23 Fax : 47623472

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Class-X


19. Answer (4) Conceptual. 20. Answer (4) Conceptual. 21. Answer (3) Conceptual. 22. Answer (2) Conceptual. 23. Answer (1) Sum of atomic mass and atomic number same for product as well as reactant. 24. Answer (1) Conceptual. 25. Answer (1) Conceptual.

CHEMISTRY 26. Answer (4) Copper is present below H in activity series. 27. Answer (2) CaCO3

Δ ⎯→ CaO + CO2

28. Answer (2) Slaked lime is Ca(OH)2) which remove the acidity without adversely affecting the soil. 29. Answer (1) It is salt of strong base and weak acid. 30. Answer (3) NaOH is base turns red litmus to blue. 31. Answer (1) Gastric juice contains dil HCl which is acid. 32. Answer (4) C2H5OH is an acid. 33. Answer (1) pH = –log[H+]

;

[H+] = 0.0001 = 10 –4 M

= –log [10 –4] =4 34. Answer (3) 35. Answer (3) Aakash Foundations -Regd. Office : Aakash Tower, Plot No. 4, Sector-11, Dwarka, New Delhi-75 Ph.: 011-47623417/23 Fax : 47623472

- 12 -


Class-X

36. Answer (2) Al is less reactive than Mg, so cannot displace it. 37. Answer (3) AgNO3 + NaCl → AgCl ↓ + NaNO3 white ppt.

38. Answer (4) Burning of food is exothermic process. 39. Answer (1) 40. Answer (4) Melting is a physical process. 41. Answer (4) 42. Answer (1) Oxidation number of Cr = x Oxidation number of O = –2 Oxidation number of Cr2O3 = 2 × x + 3(–2) = 0

∴

2x – 6 = 0 x=

+6

2

= +3

43. Answer (1) The ionic equation will be –

Loss of e (reducing agent)

–

Cl +2Br 2

→

–

2Cl + Br

2

–

gain of e (oxidising agent) 44. Answer (3) 45. Answer (3) 46. Answer (3) 18 carat gold = 18 part Au + 6 parts Ag/Cu % of gold =

18 × 100 = 75% 24

47. Answer (3) 48. Answer (3) HNO3 is oxidising agent so oxidise H 2 into H2O. 49. Answer (1) Au and Cu are refined by electrolytic refining because they are present below H in reactivity series. 50. Answer (3) Aakash Foundations - Regd. Office : Aakash Tower, Plot No. 4, Sector-11, Dwarka, New Delhi-75 Ph.: 011-47623417/23 Fax : 47623472

- 13 -

Class-X


BIOLOGY 51. Answer (2) Carbon fixation reaction i.e. reduction of CO2 into glucose occurs during the dark reaction. 52. Answer (4) Chlorophyll pigments are present in sac like structures called as thylakoids in the chloroplasts. 53. Answer (3) Visible light is involved in the process of photosynthesis and is trapped by the chlorophyll pigments. So, it is called as Photosynthetically Active Radiations (PAR). 54. Answer (1) Glycolysis takes place in the cytoplasm. 55. Answer (4) Haemoglobin, the respiratory pigment present in RBCs and absent in WBCs. Monocyte is a type of WBCs. 56. Answer (1) Glomerular filtrate refers to the filtrate collected after filtration of blood in the glomerular capillaries. It consists of excess fluid, ions, excess glucose, amino acids etc. and the nitrogenous wastes. The corpuscles and some proteins are not passed in this filtrate. 57. Answer (4) Cytokinin hormone is essential for cell division in plants. 58. Answer (2) Adrenaline is produced in emergency conditions and it helps the body to deal with those conditions. e.g., It acts on heart and lungs so that the rate of heartbeat as well as the rate of breathing is increased and the person gets enough energy in order to escape/run from that situation. 59. Answer (1) Apical bud inhibits the growth of lateral buds by releasing auxins. 60. Answer (1) 61. Answer (1) 62. Answer (1) 63. Answer (2) 64. Answer (1) Mitral or bicuspid valve is present between left atrium and left ventricle. 65. Answer (4) Acetylcholine is an example of a neurotransmitter. 66. Answer (3) Cardiac centre is present in medulla and is responsible for controlling the rate of heartbeat. 67. Answer (1) Blood platelets help in clotting of blood. 68. Answer (4) Aakash Foundations -Regd. Office : Aakash Tower, Plot No. 4, Sector-11, Dwarka, New Delhi-75 Ph.: 011-47623417/23 Fax : 47623472

- 14 -


Class-X

69. Answer (4) Hypothalamus is responsible for regulating the body temperature. 70. Answer (3) At resting stage, Na+ are more on the outer side of the neural membrane and K+ are more on the inner side of the membrane. 71. Answer (3) Lymph is a colourless fluid which returns interstitial fluid to blood and thus maintain blood volume in the body. 72. Answer (1) End products of fermentation i.e. anaerobic respiration are ethyl alcohol and CO2. 73. Answer (4) One molecule of haemoglobin carries 4 molecules of oxygen. 74. Answer (2) When muscles of atrium are relaxed during joint diastole, the blood is poured into the heart by the blood vessels. 75. Answer (4)







Aakash Foundations - Regd. Office : Aakash Tower, Plot No. 4, Sector-11, Dwarka, New Delhi-75 Ph.: 011-47623417/23 Fax : 47623472

- 15 -

22/08/2011

Regd. Office : Aakash Tower, Plot No.-4, Sec-11, MLU, Dwarka, New Delhi-110075 Ph.: 011-47623417 / 423 Fax : 011-47623472

ONLINE TEST

MM : 300

Time : 1 Hr.

(Based on PMT Pattern)

for

Nurture X DLP-2012 [Topics : Based on Module-1]

GENERAL INSTRUCTIONS : (i)

All questions are compulsory.

(ii)

Each question carries 4 marks.

(iii) For every wrong answer, 1 mark shall be deducted from total score.

PHYSICS 1.

An α-particle and a proton are accelerated at same potential difference from rest. The ratio of their final velocity is (1)

2.

2 :1

(2) 1 : 1

(3) 1: 2

(4) 1 : 2

Two points P and Q are maintained at the potential of 10 V and –4 V respectively. The work done in moving 100 electrons from P to Q is (1) 9.60 × 10 –17 J (2) –2.24 × 10 –16 J (3) 2.24 × 10 –16 J (4) –9.60 × 10 –17 J

3.

The relation between joule and volt is (1) 1 joule =

(3) 1 volt =

1 coulomb 1 volt

1 joule 1 coulomb

(2) 1 joule =

(4) 1 volt =

1 volt 1 coulomb

1 coulomb 1 joule


-1-

Class-X

4.

Online Test on PMT Pattern

The value of the current in circuit shown in figure is I

30 Ω

30 Ω

2V

5.

(1) 0.1 A

30 Ω (2) 0.01 A

(3) 1 A

(4) 10 A

The equivalent resistance between A and B in the given circuit is

6Ω

6Ω 6Ω A

(1) 9.6

6Ω

6Ω (2) 10

Ω

(3) 15 Ω 6.

Ω

Ω

A wire has a resistance of 10 Ω. It is stretched by one-tenth of its original length. Then its resistance will be (1) 9

(2) 10

Ω

(3) 11 7.

(4) 6

B

Ω

(4) 12.1

Ω

Ω

The reading of ammeter shown in figure is

6Ω 6Ω

6Ω

A 6Ω

6Ω

8.

(1) 1 A

6V (2) 2 A

(3) 3 A

(4) 4 A

Five conductors are meeting at a point O as shown in figure. What is the current in the fifth conductor?

5A 4A

3A O

3A (1) 3 A away from O

(2) 1 A away from O

(3) 4 A away from O

(4) 1 A towards O

Aakash Foundations -Regd. Office : Aakash Tower, Plot No. 4, Sector-11, Dwarka, New Delhi-75 Ph.: 011-47623417/23 Fax : 47623472

-2-


9.

Class-X

The energy consumed in operating ten 50 watt bulbs for 10 hour per day in a month (30 days) is (1) 150 kWh

(2) 500 kWh

(3) 300 kWh

(4) 15 kWh

10. Two bulbs, one of 50 watt and another 25 watt are connected into the mains. The ratio of the current through them

11.

(1) 2 : 1

(2) 1 : 2

(3) 1 : 1

(4)

2 :1

A current carrying circular loop is placed in x-y plane and a magnetic field is switched in z-axis, as shown in figure. The loop will

y

×

×

×

×

×

× i ×

×

×

×

× i ×

×

×

i

×

i

×

x

(1) Move towards positive x-axis

(2) Move towards positive y-axis

(3) Contract

(4) Expand

12. Proton and α-particle projected perpendicularly into a magnetic field, if both move in a circular path with same speed, then ratio of their radii is (1) 1 : 2

(2) 2 : 1

(3) 1 : 4

(4) 1 : 1

13. Which of the following describes common domestic power supplied in India? (1) 220 V, 100 Hz

(2) 110 V, 100 Hz

(3) 220 V, 50 Hz

(4) 110 V, 50 Hz

14. An electric current pass through a straight wire. Two magnetic compass are placed at the points A and B , then A

I

B

(1) Their needles will not deflect (2) Only one of the needles will deflect (3) Both the needles will deflect in the same direction (4) The needles will deflect in the opposite direction 15. A moving charge will gain energy due to the application of (1) Electric field

(2) Magnetic field

(3) Both (1) & (2)

(4) None of these


-3-

Class-X


16. One Tesla is equal to (1) 107 gauss

(2) 10 –4 gauss

(3) 104 gauss

(4) 10 –8 gauss

17. The current is flowing in south direction along a power line. The direction of magnetic field above the power line (neglecting earth’s field) is (1) South

(2) East

(3) North

(4) West

18. In the given figure, the electron enters into the magnetic field. It deflects in

y

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

e

(1) Positive x -direction

x (2) Negative x -direction

(3) Positive y -direction

(4) Negative y -direction

19. Unit of magnetic permeability is (1) Ampere/metre

(2) Ampere/metre2

(3) Newton/metre

(4) Newton/ampere2

20. An electric motor (1) Provides a constant potential difference

(2) Measures electric current

(3) Measures potential difference

(4) Converts electrical energy into kinetic energy

21. U238 is not suitable for chain reaction because fission reaction undergo only with (1) Steady neutrons

(2) Very slow neutrons

(3) Fast neutrons

(4) None of these

22. In atom bomb the reaction which occurs is (1) Thermo nuclear

(2) Uncontrolled fission

(3) Controlled fission

(4) Fusion

23. Complete the equation for the following fission process 235 + 01n 92 U

(1)

→ 38Sr 90 + ......

143 + 54 Xe

3 10n

(3) 57 Xe142

(2) 54 Xe145 (4) 54 Xe142 + 10n

24. The function of heavy water in a nuclear reactor is to (1) Slow down the neutrons

(2) Increases the neutrons

(3) Stop the electrons

(4) None of these

25. Nuclear fission is possible (1) Only between light nuclei

(2) Only between heavy nuclei

(3) Between both heavy and light nuclei

(4) All of these


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Class-X

CHEMISTRY 26. Which of the following metals fails to evolve hydrogen gas on reacting with dilute HCl? (1) Zinc

(2) Iron

(3) Aluminium

(4) Copper

27. Which of the following gives carbon dioxide on heating? (1) Slaked lime

(2) Lime stone

(3) Quick lime

(4) Soda ash

28. The pH of soil is 5.5. In order to increase the pH, a farmer would have to add which of the following to the soil? (1) Potassium hydroxide

(2) Slaked lime

(3) Gypsum

(4) Sodium hydroxide

29. Calcium phosphate is present in tooth enamel. Its nature is (1) Basic

(2) Acidic

(3) Neutral

(4) Amphoteric

30. Four drops of red litmus solution were added to each one of the following, which one turn it blue? (1) Alcohol

(2) Distilled water

(3) Sodium hydroxide

(4) Hydrochloric acid

31. The pH of gastric juice released during digestion is (1) Less than 7

(2) More than 7

(3) Equal to 7

(4) Equal to 0

32. Which among the following is not a base? (1) NaOH

(2) KOH

(3) NH4OH

(4) C2H5OH

33. Calculate the pH of a solution which have 0.0001 M HCl (1) 4

(2) 5

(3) 3

(4) 8

34. The following reaction is an example of 4NH3(g) + 5O 2 → 4NO (g) + 6H 2O(g) (g)

I.

Displacement reaction

II.

Combination reaction

III. Redox reaction IV. Neutralisation reaction (1) I & IV

(2) II & III

(3) I & III

(4) III & IV


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Class-X


35. Which of the following statement about the following reaction is incorrect? 3Fe + 4H2O

→

Fe3O4 + 4H 2

(1) Iron metal is getting oxidised

(2) Water is getting reduced

(3) Water is reducing agent

(4) Water is oxidising agent

36. Which of the following reaction will not take place? (1) Zn + FeSO4

→

ZnSO4 + Fe

(2) 2Al + 3MgSO4

(3) Fe + NiSO4

→

FeSO4 + Ni

(4) Cu + 2AgNO3

→

→

Al2(SO4)3 + 3Mg

Cu(NO3)2 + 2Ag

37. A white precipitate will be formed when common salt solution is added to (1) Ba(NO3)2 sol

(2) KNO3 sol

(3) AgNO3 sol

(4) Mg(NO3)2 sol

38. Which is not an endothermic reaction? (1) CaCO3

→

CaO + CO2

(3) 6CO2 + 6H 2O

→

C6H12O6 + 6O2

(2) 2H2O

→

2H2 + O 2

(4) C6H12O6 + 6O2

→

6CO2 + 6H2O

39. The chemical equations are balanced to satisfy law of (1) Conservation of mass

(2) Conservation of water

(3) Conservation of motion

(4) Constant proportion

40. Which of the following does not involve a chemical reaction? (1) Digestion of food

(2) Respiration

(3) Burning of candle wax

(4) Melting of candle wax

41. Which of the following on mixing with water will result in rise in temperature? (1) Ice

(2) KNO3

(3) CuSO4 . 5H2O

(4) NaOH

42. The oxidation number of Cr in Cr2O3 will be (1) +3

(2) –3

(3) +6

(4) –6

43. Cl2 + 2KBr

→

2KCl + Br2.

In the above reaction the oxidising agent is (1) Cl2

(2) KBr

(3) KCl

(4) Br2

44. The best conductor of electricity is (1) Copper

(2) Aluminium

(3) Silver

(4) All are equal

45. Which of the following metal forms amphoteric oxide? (1) Copper

(2) Silver

(3) Aluminium

(4) Iron

46. 18 carat gold contains (1) 50% gold

(2) 18% gold

(3) 75% gold

(4) 60% gold


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Class-X

47. Galvanisation is a method of protecting iron from rusting by coating with a thin layer of (1) Galium

(2) Aluminium

(3) Zinc

(4) Silver

48. Which of the following acid does not given H2 on reaction with metals? (1) HCl

(2) H2SO4

(3) HNO3

(4) None of these

49. Which of the following metals are refined by electrolytic refining? I.

Au

II.

Cu

III. Na IV. K (1) I & II

(2) I & III

(3) II & III

(4) III & IV

50. Stainless steel is homogeneous mixture of (1) Cu, Al, Ni

(2) Fe, Co, Ni

(3) Fe, Cr, Ni

(4) Cu, Zn

BIOLOGY 51. Which of the following events take place during the dark reaction of Photosynthesis? (1) Absorption of solar energy by chlorophyll

(2) Carbon fixation reaction

(3) Photolysis of water

(4) Formation of assimilatory power

52. In chloroplasts, chlorophyll pigments are present in (1) Outer membrane

(2) Inner membrane

(3) Stroma

(4) Thylakoids

53. Photosynthetically active radiations (PAR) involve (1) UV radiations

(2) IR radiations

(3) Visible light

(4) X-rays

54. Glycolysis occurs in (1) Cytoplasm

(2) Nucleus

(3) Mitochondria

(4) Both (1) & (3)

55. Select the mismatched pair (1) Nerve impulse – acetylcholine

(2) Heart – pacemaker

(3) Muscular movement – ATP

(4) Monocyte – Haemoglobin

56. Glomerular filtrate is (1) Blood lacking blood corpuscles and plasma protein (2) Blood lacking blood corpuscles (3) Urine (4) Mixture of water, ammonia and blood corpuscles Aakash Foundations - Regd. Office : Aakash Tower, Plot No. 4, Sector-11, Dwarka, New Delhi-75 Ph.: 011-47623417/23 Fax : 47623472

-7-

Class-X


57. The plant hormone essential for cell division is (1) Abscisic acid

(2) Auxin

(3) Gibberellin

(4) Cytokinin

58. During emergency situations, the increase in heart rate, cardiac output, blood pressure and blood sugar level, is due to the action of a hormone called (1) Aldosterone

(2) Adrenaline

(3) Vasopressin

(4) Oxytocin

59. Apical dominance in plants is caused by (1) High concentration of auxins in the terminal bud (2) High concentration of gibberellins in the apical bud (3) High concentration of auxins in the lateral bud (4) Absence of auxins and gibberellins in the apical bud 60. HCl is secreted by which of the following cells of stomach? (1) Parietal cells

(2) Peptic cells

(3) Goblet cells

(4) Chief cells

61. Hyposecretion of growth hormone causes (1) Dwarfism

(2) Myxodema

(3) Gigantism

(4) Cretinism

62. Which is the largest endocrine gland? (1) Thyroid

(2) Adrenal

(3) Thymus

(4) Pituitary

63. Lacteals are found in (1) Spleen

(2) Villi

(3) Mammary glands

(4) Intestinal glands

64. Mitral valve is present between (1) Left atrium and left ventricle

(2) Right atrium and right ventricle

(3) Right and left ventricle

(4) Left ventricle and aorta

65. The neurotransmitter produced at the synapse and neuromuscular junction is (1) GTP

(2) ATP

(3) Phosphokinase

(4) Acetylcholine

66. Cardiac centre situated in (1) Hypothalamus

(2) Cerebrum

(3) Medulla oblongata

(4) Cerebellum

67. Thromboplastin required for blood clotting at the place of injury is released by (1) Blood platelets

(2) Eosinophils

(3) Neutrophils

(4) Lymphocytes


-8-


Class-X

68. Match Column I with Column II and choose the correct option Column I

Column II

a.

Salivary amylase

(i)

Proteins

b.

Bile juice

(ii) Milk proteins

c.

Rennin

(iii) Starch

d.

Pepsin

(iv) Lipids

e.

Steapsin

(v) Emulsification of fats

(1) a(iii), b(v), c(i), d(ii), e(iv)

(2) a(v), b(iv), c(i), d(ii), e(iii)

(3) a(iii), b(iv), c(ii), d(i), e(v)

(4) a(iii), b(v), c(ii), d(i), e(iv)

69. Which of the following is mismatched? (1) Cerebrum – Memory

(2) Cerebellum – Equilibrium of body

(3) Olfactory lobes – Smell

(4) Medulla oblongata – Temperature regulation

70. At resting stage nerve cell has (1) Low K+ outside and high Na+ inside

(2) High K+ outside and low Na+ inside

(3) High K+ inside and high Na+ outside

(4) High K+ inside and low Na+ outside

71. Lymph (1) Transports O2 to brain

(2) Transports CO2 to lungs

(3) Returns interstitial fluid to blood

(4) Returns RBC’s and WBC’s to lymph nodes

72. The end products of fermentation are (1) Ethyl alcohol and CO2

(2) Ethyl alcohol and O2

(3) Methyl alcohol and CO2

(4) Pyruvate and CO2

73. How many molecules of oxygen are carried by one molecule of haemoglobin? (1) 6

(2) 8

(3) 2

(4) 4

74. Blood enters the heart because muscles of (1) Atrium contract

(2) Atrium relax

(3) Ventricle contract

(4) Ventricle relax

75. Sequence of meninges in brain from inner to outside is (1) Duramater, Arachnoid, Piamater

(2) Duramater, Piamater, Arachnoid

(3) Arachnoid, Duramater, Piamater

(4) Piamater, Arachnoid, Duramater

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Akash Medical

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