You are currently viewing NEET Chemistry Exam 2019 year Question Papers and Answer keys

NEET Chemistry Exam 2019 year Question Papers and Answer keys

46. The number of sigma (σ) and π(π) bonds in pent-2-en-4-yne is-

(1) 10 σ bonds and 3π bonds

(2) 8 σ bonds and 5π bonds

(3) 11 σ bonds and 2π bonds

(4) 13 σ bonds and no π bonds

Chemistry Notes

Physics Notes

Biology Notes

47.

(a)                       (b)

(c)                       (d)

48. The correct structure of tribromooctaoxide is

(a)                                 (b)

(c)                               (d)

49. 4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is

(1) 5f > 6p > 5p > 4d                 (2) 6p > 5f > 5p > 4d

(3) 6p > 5f > 4d > 5p                 (4) 5f > 6p > 4d > 5p

Chemistry Notes

Physics Notes

Biology Notes

50.

(1) (a) and (b) only                    (2) (a), (b) and (c)

(3) (a), (c) and (d)                     (4) (a) and (d) only

51. Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is

(Given that 1 L bar = 100 J)

(1) –30 J                (2) 5 kJ

(3) 25 J                  (4) 30 J

Chemistry Notes

Physics Notes

Biology Notes

52. Among the following, the one that is not a green house gas is

(1) Nitrous oxide             (2) Methane

(3) Ozone                        (4) Sulphur dioxide

53.