JEE & NEETJEE Chemistry 100+ MCQ & Answer JEE Main Chemistry | page-06 | General Knowledge MCQ And Answer February 1, 2025 DSN MARATHI 51. Formation of interstitial compounds makes the transition metals more ________. A. soft B. ductile C. malleable D. hard Answer Option : D 52. Transition elements exhibit variable valency because they release electrons from ________. A. ns orbitals B. np orbitals C. (n-1)d orbitals D. (n-1)d & ns orbitals Answer Option : C 53. In industrial processes, transition elements and their oxides are used as ________. A. catalyst B. insecticides C. surfactants D. Any of them Answer Option : A 54. Transition metals are complexes act as ________. A. Neutral B. Lewis acid C. Lewis base D. None of the above Answer Option : B 55. The density of transition metals in a series ________. A. remains constant B. increases gradually C. decreases gradually D. may increase or decrease Answer Option : B 56. Paramagnetism is common in ________. A. d-block elements B. p-block elements C. s-block elements D. Any of them Answer Option : A 57. The 3d transition series contains elements having an atomic number from ________. A. 21 to 29 B. 21 to 30 C. 21 to 31 D. 21 to 32 Answer Option : B 58. Atomic radii of d-block elements in a series ________. A. increases with increase in atomic number B. decreases with increase in atomic number C. remains constant D. none of the above Answer Option : B 59. Transition metals are generally coloured because ________. A. of d-d transition B. they absorb electromagnetic radiations C. their penultimate d-subshells are fully filled D. none of the above Answer Option : A 60. The maximum number of electrons with l = 3 is _______. A. 10 B. 2 C. 8 D. 14 Answer Option : D
51. Formation of interstitial compounds makes the transition metals more ________. A. soft B. ductile C. malleable D. hard Answer Option : D
52. Transition elements exhibit variable valency because they release electrons from ________. A. ns orbitals B. np orbitals C. (n-1)d orbitals D. (n-1)d & ns orbitals Answer Option : C
53. In industrial processes, transition elements and their oxides are used as ________. A. catalyst B. insecticides C. surfactants D. Any of them Answer Option : A
54. Transition metals are complexes act as ________. A. Neutral B. Lewis acid C. Lewis base D. None of the above Answer Option : B
55. The density of transition metals in a series ________. A. remains constant B. increases gradually C. decreases gradually D. may increase or decrease Answer Option : B
56. Paramagnetism is common in ________. A. d-block elements B. p-block elements C. s-block elements D. Any of them Answer Option : A
57. The 3d transition series contains elements having an atomic number from ________. A. 21 to 29 B. 21 to 30 C. 21 to 31 D. 21 to 32 Answer Option : B
58. Atomic radii of d-block elements in a series ________. A. increases with increase in atomic number B. decreases with increase in atomic number C. remains constant D. none of the above Answer Option : B
59. Transition metals are generally coloured because ________. A. of d-d transition B. they absorb electromagnetic radiations C. their penultimate d-subshells are fully filled D. none of the above Answer Option : A
