Science bits Jaundice is caused due to

51. Jaundice is caused due to the infection of—

(A) Brain

(B) Liver

(C) Kidney(D) Spleen

Ans : (B)

52. The average heart beat rate per minute in a normal person is—

(A) 82(B) 92

(C) 72

(D) 98

Ans : (C)

53. EEG records the activity of—

(A) Heart

(B) Lungs

(C) Brain

(D) Muscles

Ans : (C)

54. The colour of cow’s milk is slight yellow due to the presence of—

(A) Xanthophyll

(B) Riboflavin

(C) Ribulose

(D) Carotene

Ans : (D)

55. Which one of these is a communicat disease ?

(A) Diabetes

(B) Diphtheria

(C) Arthritis

(D) Cancer

Ans : (B)

56. The concertration of which of following decreases in anaemia ?

(A) Haemoglobin

(B) Collagen

(C) Hyoglobin

(D) Myosin

Ans : (A)

57. Which of the following diseases usually spreads through air ?

(A) Plague

(B) Typhoid

(C) Tuberculosis

(D) Cholera

Ans : (A)

58. Cereals are a rich source of—

(A) Starch

(B) Glucose

(C) Fructose(D) Maltose

Ans : (A)

59. Aspirin is common name of—

(A) Salicylic Acid(B) Salicylate

(C) Methyl Salicylate

(D) Acetyl Salicylic Acid

Ans : (D)

60. Small Pox is caused by—

(A) Rubeola Virus

(B) Variola Virus

(C) Varicella

(D) Myxovirus

Ans : (B)

61. Carbon monoxide is an inflammable gas. Which one of the following is also

inflammable ?

(A) Helium

(B) Nitrogen

(C) Oxygen

(D) Hydrogen

Ans : (D)

62. Aerobic respiration process requires—

(A) Heat

(B) Water

(C) Oxygen

(D) Sunlight

Ans : (C)

63. Which one of the following metals does not react with water to produce

Hydrogen ?

(A) Potassium

(B) Cadmium

(C) Sodium

(D) Lithium

Ans : (B)

64. Ozone consists of—

(A) Oxygen only

(B) Oxygen and Nitrogen

(C) Hydrogen and Carbon

(D) Oxygen and Carbon

Ans : (A)

65. Which of the following liquids has the least density ?

(A) Fresh water(B) Salt water

(C) Petrol

(D) Mercury

Ans : (C)

66. Which of the following principle is used to produce ‘low-temperatures’ ?

(A) Super conductivity(B) Joule-Kelvin effect

(C) Thermo-electric effect

(D) Adiabatic demagnetization

Ans : (D)

67. A photo-electric cell converts—

(A) Mechanical energy to electric energy

(B) Heat energy to mechanical energy

(C) Light energy to chemical energy

(D) Light energy to electrical energy

Ans : (D)

68. Two stones of different masses are dropped simultaneously from the top of a

building—

(A) Smaller stone reaches the ground earlier

(B) Larger stone reaches the ground earlier

(C) Both the stones reach the ground at the same time

(D) Depends on the composition of the stone

Ans : (C)

69. Pulsars are—

(A) Stars moving towards the Earth

(B) Stars moving away from Earth

(C) Rapidly spinning stars

(D) High temperature stars

Ans : (C)

70. Biggest planet of solar system is—

(A) Earth

(B) Mars

(C) Saturn

(D) Jupiter

Ans : (D)

 73. The ozone hole that has been detected lies in the atmosphere above—

(A) Arctic Ocean(B) Antarctica

(C) India

(D) Alaska

Ans : (B)

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61. The age of tree can be determined more or less accurately by

(a) counting the number of branches.

(b) measuring the height ,of the tree.

(c) measuring the diameter of the trunk.

(d) counting the number of rings in the trunk.

62. Of all micro-organisms, the most adaptable and versatile are

(a) Viruses

(b) Bacteria

(c) Algae d) Fungi

63. What is an endoscope?

(a) It is an optical instrument used to see inside the alimentary canal

(b) it is device which is fitted on the chest of the patient to regularize the irregular

heart beats

(c) It is an instrument used for examining ear disorders

 (d) It is an instrument for recording electrical signals produced by the human

muscles.

64. The disease in which the sugar level increase is known as

(a) Diabetes mellitus

(b) Diabetes insipidus

(c) Diabetes imperfectus

(d) Diabetes sugarensis64. (a

66. The nitrogen present in the atmosphere is

(a) of no use to plants.

(b) injurious of plants.

(c) directly utilized by plants.

(d) utilized through micro-organisms.

66. (a)

67. Diamond and Graphite are

(a) allotropes

(b) isomorphous

(c) isomers

(d) Isobars

67. (b

68. Kayak is kind of

(a) tribal tool.

(b) boat.

(c) ship.

(d) weapon.

) 68. (b)

69. Which of the following has the highest calorific value?

(a) Carbohydrates

(b) fats

(c) Proteins

(d) Vitamins.

69. (a)

70. Rotation of crops means

(a) growing of different crops in succession to maintain soil fertility.

(b) some crops are growing again and again.

(c) two or more crops are grown simultaneously to increase productivity.

(d) None of these. 70. (a)

73. "Slash and Burn agriculture" is the name given to

(a) method of potato cultivation.

(b) process of deforestation.

(c) mixed framing.

(d) shifting cultivation. 73. (a

74. The main reason for deforestation in Asia is

(a) excessive fuel wood collection.

(b) excessive soil erosion.

(c) floods.

(d) construction of roads. ) 74. (d

75.Recharging of water table depends on

(a) amount of rainfall.

(b) relief of the area.

(c) vegetation of the area.

(d) amount of percolation.    75. (a)