Alpha Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>Exercise-2>Q 12

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Which of the following is not an actinoid?

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Important Questions on The d- and f-Block Elements

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Alpha Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>Exercise-2>Q 13

The correct statement(s) from among the following is/are?
(

i

) all the

d

and

f -

block elements are metals
(

ii

) all the

d

and

f -

block elements form coloured ions
(

iii

) all the

d

and

f -

block elements form paramagnetic ions

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Alpha Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>Exercise-2>Q 14

Which of the following statements is not correct?

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Alpha Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>Exercise-2>Q 15

The total number of

3 d

series transition elements contain either

3 d^{1}

or

4 s^{1}

orbital in their ground state electronic configuration.

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Alpha Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>Exercise-2>Q 19

An element of the

I^{st}

transition series

X^{+ 3}

have the highest magnetic moment in series and

X^{+ 2}

have non-magnetic nature as low spin complex. If Atomic number of

X

is

a

and the number of unpaired

e^{-}

in free state

X^{+ 2}

and

X^{+ 3}

is

b

and

c

, calculate

a + b + 2 c

.

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Alpha Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>Exercise-2>Q 20

Chromite ore is processed through the following sequence:

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In this sequence, how many species (from $A$ to $H$ ) show green colour?

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Alpha Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>Exercise-2>Q 25

Which of the following statements are correct?

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Alpha Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>Exercise-2>Q 30

The colour of the transition metal ions is/are due to:

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Alpha Question Bank for Engineering: Chemistry>Chapter 20 - The d- and f-Block Elements>Exercise-2>Q 32

Which of the following statements are correct when a mixture of

NaCl

and

K_{2} {Cr}_{2} O_{7}

is gently warmed with concentrated

H_{2} {SO}_{4}

?