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given initially, what would be the mole fraction of D present after completion of reaction? (1) 0.24 (3) 0.40 (2) 0.65 (4) 0.08 52. If air is considered as a compound (not as a mixture) of N and O having same mass percentage (80% N and 20% O by mass), then what will be the chemical formula of air? (1) $N_2O_5$ (3) $N_2O$ (2) $NO$ (4) $N_8O_3$ 53. A natural sample of Antimony gas consist Sb121 and Sb123 isotope. If the average atomic mass of ding the 57. Two particles A and B having mass ratio 4: 3 are moving with kinetic energy 1: 27 in ratio. What would be the ratio of wavelength associated with particle A to that of particle B? (1) 2:3 (3) 3:4 (2) 9:2 (4) 6:5 58. A farmer has 1 dozen mangoes in his basket. How many significant figures are present in the counting of mango? (1) 1 (2) 2 (3) 0 (4) Infinite

          given initially, what would be the mole fraction of D
present after completion of reaction?
(1) 0.24
(3) 0.40
(2) 0.65
(4) 0.08
52. If air is considered as a compound (not as a
mixture) of N and O having same mass percentage
(80% N and 20% O by mass), then what will be
the chemical formula of air?
(1) $N_2O_5$
(3) $N_2O$
(2) $NO$
(4) $N_8O_3$
53. A natural sample of Antimony gas consist Sb121
and Sb123 isotope. If the average atomic mass of
ding the
57. Two particles A and B having mass ratio 4: 3 are
moving with kinetic energy 1: 27 in ratio. What
would be the ratio of wavelength associated with
particle A to that of particle B?
(1) 2:3
(3) 3:4
(2) 9:2
(4) 6:5
58. A farmer has 1 dozen mangoes in his basket. How
many significant figures are present in the counting
of mango?
(1) 1
(2) 2
(3) 0
(4) Infinite

$given initially, what would be the mole fraction of D present after completion of reaction? (1) 0.24 (3) 0.40 (2) 0.65 (4) 0.08 52. If air is considered as a compound (not as a mixture) of N and O having same mass percentage (80% N and 20% O by mass), then what will be the chemical formula of air? (1) N2O5 (3) N2O (2) NO (4) N8O3 53. A natural sample of Antimony gas consist Sb121 and Sb123 isotope. If the average atomic mass of ding the 57. Two particles A and B having mass ratio 4: 3 are moving with kinetic energy 1: 27 in ratio. What would be the ratio of wavelength associated with particle A to that of particle B? (1) 2:3 (3) 3:4 (2) 9:2 (4) 6:5 58. A farmer has 1 dozen mangoes in his basket. How many significant figures are present in the counting of mango? (1) 1 (2) 2 (3) 0 (4) Infinite$

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