Office of the DDPI, Kolar District

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SCIENCE MODEL PAPER-2 (2020-21) MCQ PATTERN (AS PER KSEEB MODEL PAPER)

Smt. K.S. SHASHIVADANA, Subject Inspector (Science)

Name of the Student : *

SCHOOL ADDRESS : *

TALUK : *

𝗙𝗼𝘂𝗿 𝗰𝗵𝗼𝗶𝗰𝗲𝘀 𝗮𝗿𝗲 𝗴𝗶𝘃𝗲𝗻 𝗳𝗼𝗿 𝗲𝗮𝗰𝗵 𝗼𝗳 𝘁𝗵𝗲 𝗾𝘂𝗲𝘀𝘁𝗶𝗼𝗻𝘀/𝗶𝗻𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝘀𝘁𝗮𝘁𝗲𝗺𝗲𝗻𝘁𝘀. 𝗖𝗵𝗼𝗼𝘀𝗲 𝘁𝗵𝗲 𝗰𝗼𝗿𝗿𝗲𝗰𝘁 𝗮𝗻𝘀𝘄𝗲𝗿 𝗮𝗻𝗱 𝘀𝗵𝗮𝗱𝗲 𝘁𝗵𝗲 𝗰𝗼𝗿𝗿𝗲𝗰𝘁 𝗰𝗵𝗼𝗶𝗰𝗲 𝗶𝗻 𝘁𝗵𝗲 𝗢𝗠𝗥 𝗴𝗶𝘃𝗲𝗻 𝘁𝗼 𝘆𝗼𝘂 𝘄𝗶𝘁𝗵 𝗯𝗹𝘂𝗲 / 𝗯𝗹𝗮𝗰𝗸 𝗯𝗮𝗹𝗹 𝗽𝗼𝗶𝗻𝘁 𝗽𝗲𝗻 :

41) A light ray enters a glass slab at exactly 90⁰. Its angle of refraction is : *

1 point

A) 90⁰

B) 60⁰

C) 30⁰

D) 0⁰

42) A beam of light is incident through the holes on side A and emerges out of the holes on the other face B of the box as shown in figure. Which of the following could be inside the box? *

1 point

A) Concave lens

B) Rectangular glass slab

C) Prism

D) Convex lens

43) For a spherical lens, the relation between v, u, and f is : *

1 point

A) F=1/u+v

B) 1/f=(1/v)-(1/u)

C) 1/f=(1/v)+(1/u)

D) 1/f=u+v

44) If the power of a lens is 2.5D, what is its focal length? *

1 point

A) 25cm

B) 2.5cm

C) 25m

D) 0.4m

45) The relation between potential difference (V) and current (I) is: *

1 point

A) V α I²

B) V α I

C) V² α I

D) V α 1/I

46) Which of the following, resistance does not depend on? *

1 point

A) Length of conductor

B) Area of cross-section

C) Temperature

D) Density

47) A car headlight bulb working on a 12 V car battery draws a current of 0.5 A. The resistance of the light bulb is : *

1 point

A) 0.5 Ω

B) 6 Ω

C) 24 Ω

D) 12.5Ω

48) An electric heater is rated at 2 Kw. Electrical energy costs Rs 4 per k Wh. What is the cost of using the heater for 3 hours? *

1 point

A) Rs. 12

B) Rs. 24

C) Rs.36

D) Rs. 48

49) The heat produced by passing an electric current through a fixed resistor is proportional to the square of : *

1 point

A) Magnitude of resistance of the resistor

B) Temperature of the resistor

C) Magnitude of current

D) Time for which current is passed

50) The magnetic needle brought near a conductor carrying current : *

1 point

A) remains stationary

B) deflects

C) does not deflect

D) becomes non-magnetic

51) An electric generator with commutator gives : *

1 point

A) Alternate Current

B) Direct Current

C) Mechanical energy

D) Light energy

52) In domestic wiring usually the colour of insulation material on the live wire is : *

1 point

A) green

B) black

C) red

D) yellow

53) An electric power station which uses natural energy source directly to turn turbines : *

1 point

A) Thermal Power Plant

B) Hydroelectric Power Plant

C) Nuclear Power Plant

D) Solar Power Plant

54) The gas produced by the decomposition of cow dung, vegetables etc., in anaerobic conditions is : *

1 point

A) CNG

B) LPG

C) Gober gas

D) Water gas

55) The process used to convert metal sulphide ores into their oxides is : *

1 point

A) Roasting

B) Reduction

C) Electrolysis

D) Calcination

56) Which of the following hydrocarbons undergo addition reactions ? *

1 point

A) CH₄

B) C₂H₄

C) C₃H₈

D) C₄H₁₀

57) The atomic number of an element ‘X’ is 12 and the atomic number of ‘Y’ is 17. Then the type of bond formed between these two elements : *

1 point

A) Hydrogen Bond

B) Covalent Bond

C) Ionic Bond

D) Metallic Bond

58) When 5 ml of acetic acid is added dropwise to 5 ml of water, we observe that : *

1 point

A) formation of a separate layer of acid over water

B) formation of a separate layer of water on acid

C) formation of a clear homogenous solution

D) formation of a pink coloured solution

59) The functional group present in the carbon compound CH₃CH₂CH₂CHO : *

1 point

A) Aldehyde

B) Alcohol

C) Ketone

D) Carboxylic Acid

60) Which of the given elements A, B, C and D with atomic number 2, 3, 10 and 12 respectively belong to the same period? *

1 point

A) A, B,

B) B, C,

C) B, C, D,

D) C, D,

61) Identify the correct statement with respect to carbon compounds : *

1 point

A) dissolve in water

B) good conductors of electricity

C) have high melting and boiling points

D) the forces of attraction between these molecules are not very strong

62) In modern periodic table as we move from left to right across a period, the valency of elements : *

1 point

A) decreases

B) does not change

C) increases

D) first increases and then decreases

63) With the help of the given chemical equations, what conclusion you take about the nature of Aluminium oxide ? *

1 point

A) Acidic oxide

B) Basic oxide

C) Amphoteric oxide

D) Neutral oxide

64) The compound formed when excess of CO₂ gas is passed through lime water : *

1 point

A) CaCO₃

B) CaCO₃ + H₂O

C) Ca(OH)₂ + CO₂

D) Ca(HCO₃)₂

65) Compound that does not form H⁺ ions when added to water : *

1 point

A) HCl

B) H₂SO₄

C) CH₃OH

D) CH₃COOH

66) The compound with the molecular formula C₆H₆ is: *

1 point

A) Hexane

B) Cyclo hexane

C) Iso hexane

D) Benzene

67) Most important method of transport in plants during night time is : *

1 point

A) effect of root pressure

B) Transpiration

C) Translocation

D) Opening of Stomatal Pore

68) The blood goes only once through the heart in these during one cycle of passage through the body : *

1 point

A) Frog, Lizard

B) Whale, Chameleon

C) Labeo, Salamander

D) Shark, Hippocampus

69) The main function of abscisic acid in plants is to : *

1 point

A) increase the length of cells

B) promote cell division

C) inhibit growth

D) promote growth of stem

70) Choose the incorrect statement about insulin: *

1 point

A) It is produced from pancreas

B) It regulates blood sugar level

C) Iodine is required for its synthesis

D) Insufficient secretion of insulin will cause diabetes

71) The structure that controls reflex actions is: *

1 point

A) Medulla

B) Cerebrum

C) Hypothalamus

D) Spinal Cord

72) The part of the reproductive system of Humans where fertilization occurs : *

1 point

A) Ovaries

B) Uterus

C ) Vagina

D) Oviduct (fallopian tube)

73) The correct sequence of organs in the male reproductive system for transport of sperms is : *

1 point

A) testis --> vas deferens -->urethra

B) testis --> ureter --> urethra

C) testis --> urethra --> ureter

D) testis --> vas deferens --> ureter

74) The part of the seed that grows and develops into shoot on germination : *

1 point

A) Cotyledon

B) Plumule

C) Radicle

D) Seed Coat

75) If a round yellow seeded pea plant (RrYY) is crossed with wrinkled green seeded pea plant (rryy). The seeds produced in F₁ generation are : *

1 point

A) Half of the seeds are round yellow & half of them are wrinkled green

B) Half of the seeds are round yellow & half of them are wrinkled yellow

C) All seeds are wrinkled and green

D) All seeds are round and yellow

76) Acquired character among these : *

1 point

A) Colour of skin

B) Size of body

C) Colour of eyes

D) Texture of hair

77) Analogous organs are : *

1 point

A) our arm & a dog’s fore-leg

B) our teeth & an elephant’s tusks

C) potato & runners of grass

D) wing of a bat & wing of a bird

78) This component in CFC causes most damage to the ozone layer : *

1 point

A) Chlorine

B) Fluorine

C) Carbon

D) Hydrogen

79) Using the plastic Jam bottle in the kitchen for storing things : *

1 point

A) Recycle

B) Reduce

C) Reuse

D) Repurpose

80) The following community in Rajasthan has a religious tenet of conservation of forest and wildlife : *

1 point

A) Agarwal

B) Jaiswal

C) Bishnoi

D) Jain

Your opinion about this Quiz : *

Technical Support :

C K GOPALA RAO, Assistant Master, GHS (RMSA), THORALAKKI, MALUR TALUK, KOLAR DISTRICT,
K T SHIVAKUMAR ASSISTANT MASTER, GGJC, SIRA, TUMKUR NORTH

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