General Instructions: Same as Periodic Test 2.
1. Choose and write the correct answer for each of the following.
(5 x 1 = 5)
(1) Which of the following pairs of gases contains the same number of molecules?
(a) 8 g of O, and 22 g of CO,
(b) 16 g of O, and 14 g of N,
(c) 32 g of O, and 32 g of N,
(d) 28 g of N, and 22 g of CO,
(11) Which among the following are characteristic features of vertebrates?
(a) Have a notochord
(b) Have a dorsal nerve cord
(c) Are triploblastic
(d) All of the above
(iii) A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road
The work done against the gravitational force will be (g = 10 m/s).
(a) 6 x 10']
(6) 6J
(c) 0,6)
(d) zero
(iv) Which one of the following diseases is not transmitted by mosquito?
(a) Brain fever
(b) Malaria
(c) Typhoid
(d) Dengue
(u) Two chemical species X and Y combine together to form a product P which contains both X
and y
x+y
X + Y-> P
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Answer:
cheating copy past
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