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SUBHASH PUBLICATION-THE 'd' - AND 'f' - BLOCK ELEMENTS -Question and Answer
- What happens when lanthanoids are heated in Carbon?
01:14
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- How lanthanoids reacts with water and dil. Acids?
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- What is mischmetall? Give its one use.
02:26
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- What is actinoid contraction? Why actinoid contraction is greater than...
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- Give reason: Actinoid contraction is greater from element to element t...
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- Give general oxidation state of actinoids. Why actinoids shows variabl...
02:35
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- Zr and Hf have almost identical atomic radii. Give reason.
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- Give reasons: Actinoids show variable oxidation states.
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- Give reasons: Zr and Hf have almost identical radii.
02:35
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- Give reason: Why Lanthanoids are less reactive than actinoids.
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- Out of the following elements identify the element which does not exhi...
02:33
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- Give Reason. Most of the transition metals have high melting point a...
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- Give Reason. Second ionisation enthalpy of copper is exceptionally h...
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- Give reason. Atomic size of 4d and 5d series elements are almost the...
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- Study of actinoid elements is difficult. Give two reasons.
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- Give reasons : Cerium (Ce) exhibits +4 oxidation state
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- Among Fe^(2+) and Fe^(3+) which is more stable? Give reason.
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- Give reason: Mn exhibits the higher oxidatoin state of +7 among 3d s...
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- Give reason: Cu^(2+) is paramagnetic and Cu^(+) is diamagnetic.
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- Give reason 'transition metals generally form coloured compound'.
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