d and f Block Elements

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Q JEE MAIN 2020

Mischmetal is an alloy consisting mainly of

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Q JEE MAIN 2020

The electronic configurations of bivalent europium and trivalent cerium are
(atomic number : Xe = 54, Ce = 58, Eu = 63)

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The third ionization enthalphy is minimum for

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Q JEE-MAIN 2020

Boron and silicon of very high purity can be obtained through

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Q JEE MAIN 2019

The correct order of the first ionization enthalpies is :

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Q JEE-MAIN 2020

Reaction of ammonia with excess Cl2 gives

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Q JEE MAIN 2019

The highest possible oxidation states of uranium and plutonium, respectively, are :

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Q JEE Main 2019

The effect of lanthanoid contraction in the lanthanoid series of elements by and large means

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Q JEE MAIN 2020

The sum of the total number of bonds between chromium and oxygen atoms in chromate and dichromate ions is ____________ .

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Q JEE MAIN 2020

The reaction in which the hybridisation of the underlined atom is affected is

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