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71. The atomic number of E, F, G and H are given below, which element belongs to zero group Element Atomic number
E 5
F 7
G 10
H 16
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72. The elements P, Q, R, S belong to group number 14, 15, 16, 17 respectively. Select the elements in increasing order of their electronegativity. (NTSE Maharashtra, Stage-I, 2016-17)
P < Q < R < S
P > Q > R > S
R < Q < P < S
Q < P < S < R
73. In the given square P, Q, R, S with atomic number is written are metalloids. About this the 4 statements are given below. Select the correct option of the true statements (a) Element after square P is a non-metal (b) Square R represents metalloid (c) Element just before square R is a metalloid (d) Element just before square S is a non-metal (NTSE Maharashtra, Stage-I, 2016-17)
(a), (b) and (c)
(a), (b) and (d)
(b) and (c)
(b) and (d)
74. Elements A, B, C having positions in periodic table Group 16 Group 17 ________ ________ ________ A ________ ________ B C (A) A is metal (B) C is smaller in size as compared to B (C) Element A gives negatively charged ion (NTSE Punjab, Stage-I, 2016-17)
A, Band C are correct
Only Band C are correct
Only B is correct
A and C are correct
75. n1 molecules of a gas are kept in container of definite volume at a temperature of r and at a pressure P. What will be the pressure of the gas at that temperature when n2 molecules of gas is removed from the container? (NTSE West Bengal, Stage-I, 2014-15)
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