61. Carbon is an example of which of the following?
(A) Metal
(B) Metalloid
(C) Non-metal
(D) None of the above

62. Which of the following groups of elements will be classified as Dobereiner’s triad?
(Atomic mass: a=19, b = 23, c = 24, d=29, e=35, f= 40)
(A) a, b and c
(B) b, c and d
(C) b, d and e
(D) b, d and f

63. The maximum number of electrons present in a shell is given by the formula
(A) 2n²
(B) n²
(C) 2n
(D) n

64. Black coating of silver and green coating of copper are examples of
(A) Oxidation
(B) Precipitation
(C) Corrosion
(D) None of these

65. Aqua regia is 3: 1 mixture of which of the following acids?
(A) HNO₃ : HCl
(B) H₂SO₄ : HCl
(C) HCl : HNO₃
(D) HCl : H₂SO₄

66. Which gas is used in flushing bag of chips for preventing them from getting oxidised?
(A) Hydrogen
(B) Chlorine
(C) Carbon dioxide
(D) Nitrogen

Biology

67. Following is the diagram showing sectional view of an Endocrine Gland. Which of the numbered layers secrete cortisol and corticosterone hormones ?

Choose the correct options:
(A) 4 and 5
(B) 3 and 4
(C) 2 and 3
(D) 1 and 2

68. Which of the following is related with discontinuous variations produced during the process of evolution?
(A) Orthogenic variations
(B) Mutations
(C) Blastogenic variations
(D) Morphogenic variations

69. Choose the correct group of micronutrients essential for plants.
(A) Nitrogen, manganese, copper, sulphur
(B) Iron, calcium, magnesium, chlorine
(C) Iron, copper, boron, manganese
(D) Iron, phosphorus, calcium, molybdenum

70. Match the words of Column I with that of Column II.
Column I – Column II
1. Trypsin – a. Pancreas
2. Ptyalin – b. Liver
3. Cholic acid – c. Kidney
4. Renin – d. Saliva
Select the correct option from below:
(A) 1-b, 2-a, 3-d, 4-c
(B) 1-a, 2-d, 3-b, 4-c
(C) 1-c, 2-a, 3-b, 4-d
(D) 1-b, 2-3-a, 4-c

71. With reference to body fluid components and homeostasis, which of the following serve(s) as supply line and sanitary drainage line of body respectively?
(A) Intracellular fluid and lymph
(B) Extracellular fluid and blood
(C) Blood plasma, lymph and interstitial fluid
(D) Extracellular fluid and interstitial fluid

72. Emasculation is required for which of the following?
(A) To obtain pure lines
(B) Selective hybridization
(C) Self pollination
(D) Inbreeding

73. Following diagram depicts cross section of a complex permanent tissue, showing following elements:
i. Sieve cell
ii. Phloem parenchyma
iii. Companion cell
iv. Sieve plate

Choose the correct answer :
i ii iii iv
(A) b d a c
(B) d a b c
(C) a b c d
(D) c b d a

74. The endangered largest living lemur Idri idri is found in
(A) Madagascar
(B) South America
(C) New Zealand
(D) Australia

75. Which of the following animals has book lungs for respiration?
(A) Centipede
(B) Scorpion
(C) Palaemon
(D) Hyla

76. Select the non-essential amino acids. from the following.
(A) Tyrosine and arginine
(B) Glutamine and lysine
(C) Aspartic acid and cysteine
(D) Proline and leucine

77. Study the following table:
Phylum/Class/Example – Characteristic
1. Euplectella – i. Egg-laying
2. Cnidaria – ii. Syrinx
3. Aves – iii. Glass sponge
4. Echidna – iv. Stinging cells
Choose the option having correct matches:

	1	2	3	4
(A)	iii	iv	ii	i
(B)	ii	iii	i	iv
(C)	iii	iv	i and ii	i
(D)	iv	iii	i and ii	ii

78. Which of the following is not known as B Vitamins?
(A) Thiamine
(B) Folic Acid
(C) Ascorbic Acid
(D) a-lipoic Acid

79. A few statements regarding sexual reproduction are given below:
I. Sexual reproduction does not require two individuals.
II. External fertilization is a rule during, sexual reproduction.
III. Sexual reproduction generally involves gametic fusion.
IV. Meiosis occurs during sexual reproduction.
Choose correct statements from the options given below.
(A) Statement I and II
(B) Statement I and III
(C) Statement III and IV
(D) Statement I and IV

80. On injury bleeding occurs. To avoid this which of the following helps plugging the leaks by making clots at the point of injury?
(A) Monocytes
(B) Lymphocytes
(C) Platelets
(D) Basophils