Chemistry Crash Course NEET>Chapter 19 - The d- and f-Block Elements>Level 1>Q 77

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${MnO}_{2}$ when fused with $KOH$ and oxidized in air gives a dark green compound $X$ . In acidic solution, $X$ undergoes disproportion to give an intense purple compound $Y$ and ${MnO}_{2}$ . The compounds $X$ and $Y$ . respectively, are

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Important Questions on The d- and f-Block Elements

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Chemistry Crash Course NEET>Chapter 19 - The d- and f-Block Elements>Level 1>Q 78

In an alkaline medium, the reaction of hydrogen peroxide with potassium permanganate produces a compound in which the oxidation state of

Mn

is _______.

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Chemistry Crash Course NEET>Chapter 19 - The d- and f-Block Elements>Level 1>Q 79

The number of moles of

{Br}_{2}

produced when two moles of potassium permanganate are treated with excess potassium bromide in aqueous acid medium is:

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Chemistry Crash Course NEET>Chapter 19 - The d- and f-Block Elements>Level 1>Q 80

Which of the following properties is not the characteristic of transition elements?

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Chemistry Crash Course NEET>Chapter 19 - The d- and f-Block Elements>Level 1>Q 81

(n - 1) d^{10} {ns}^{2}

is the general electronic configuration of

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Chemistry Crash Course NEET>Chapter 19 - The d- and f-Block Elements>Level 1>Q 82

"

925

fine silver" is an alloy of

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Chemistry Crash Course NEET>Chapter 19 - The d- and f-Block Elements>Level 1>Q 83

The

3 d

-series starts from:

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Chemistry Crash Course NEET>Chapter 19 - The d- and f-Block Elements>Level 1>Q 84

The first element in the

3 d

-transition series is

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Chemistry Crash Course NEET>Chapter 19 - The d- and f-Block Elements>Level 1>Q 85

Formation of an interstitial compound makes the transition metal