The number of unpaired electrons in the gaseous ions are, respectively:
1. 3, 2, 3, and 1
2. 2, 2, 3, and 1
3. 4, 3, 2, and 1
4. 1, 2, 3, and 4
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAlloy that contains lanthanoid metals is-
1. Mischmetal
2. Permalloy
3. Supermalloy
4. Brass
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGive below are some atomic numbers:
29, 59, 74, 95, 102, 104
The atomic numbers of the inner transition elements among the above are :
1. 29, 59, 74
2. 59, 95, 102
3. 95, 102, 104
4. 59, 74, 95
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe electronic configuration of the last element of actinoids is
1. Thorium, Th:
2. Lawrencium, Lr:
3. Neptunium, Np:
4. Protactinium, Pa:
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe number of 3d electrons in each of the Cr3+ ions will be:
1. 5
2. 6
3. 3
4. 7
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe correct statement regarding Ag is
1. | It is a hard metal. |
2. | It is not a transition element. |
3. | It has a partially filled d orbital in a +2 oxidation state. Thus, it is a transition element. |
4. | None of the above |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe enthalpy of atomization of transition metals is high due to
1. High effective nuclear charge
2. A large number of valence electrons
3. Very strong metallic bonds
4. All of the above
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe transition metals generally form coloured compounds due to
1. | Absorption of radiation to promote an electron . |
2. | Presence of ligands, the d-orbitals split up into two sets of orbitals. |
3. | Energy required to promote an electron in d subshell is low. |
4. | All of the above. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the following :
Elements | Electronic configuration |
i. 61 | a. [Rn]5f136d0 7s 2 |
ii. 91 | b. [Xe]4f56s2 |
iii. 101 | c. [Rn]5f146d77s2 |
iv. 109 | d. [Rn] 5f2 6d17s2 |
i | ii | iii | iv | |
1. | b | d | a | c |
2. | c | a | d | b |
3. | c | d | a | b |
4. | a | c | b | d |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTransition metals and their many compounds act as good catalysts due to
1. Variable oxidation states.
2. Unstable intermediate.
3. Provide a suitable surface.
4. All of the above.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology