Match the catalysts to the correct process. Catalyst Process A. T i C l 3 i. Wacker process B. P d C l 2 ii. Ziegler – Natta polymerisation C. C u C l 2 iii. Contact process` D. V 2 O 5 iv. Deacon’s process

A → i i , B → i , C → i v , D → i i i

A → i i i , B → i , C → i i , D → i v

A → i i i , B → i i , C → i v , D → i

A → i i , B → i i i , C → i v , D → i

MEDIUM

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Important Questions on The d- and f-Block Elements

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

Which of the following statements is incorrect for pair of elements Zr - Hf?

HARD

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

A water tank has the shape of an inverted right circular cone, whose semi-vertical angle is

{t a n}^{- 1} (\frac{1}{2}) .

Water is poured into it at a constant rate of

5 cubic m / \min .

Then the rate

(

m / \min),

at which the level of water is rising at the instant when the depth of water in the tank is

10 m;

is:

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

2

m ladder leans against a vertical wall. If the top of the ladder begins to slide down the wall at the rate

25 c m / s e c

, then the rate (in cm/sec.) at which the bottom of the ladder slides away from the wall on the horizontal ground when the top of the ladder is

1

m above the ground is:

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

Find the rate of change of the area of a circle with respect to its radius $r$ when $r = 3 c m$

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

Explain why:

{Zn}^{2 +}

salts are white whereas

{Cu}^{2 +}

salts are coloured.

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

The radius of a circle is increasing at the uniform rate of

3 cm / sec

. At the instant when the radius of the circle is

2 cm

, its area increases at the rate of

k π

{cm}^{2}

, then

k =

_____

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

A spherical iron ball of radius

10 c m

is coated with a layer of ice of uniform thickness that melts at a rate of

50 c m^{3} / m i n .

When the thickness of the ice is

5 c m,

then the rate at which the thickness

(

c m / m i n)

of the ice decreases, is :

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

Match the catalysts to the correct process.

	Catalyst		Process
A.	$T i C l_{3}$	i.	Wacker process
B.	$P d C l_{2}$	ii.	Ziegler – Natta polymerisation
C.	$C u C l_{2}$	iii.	Contact process`
D.	$V_{2} O_{5}$	iv.	Deacon’s process

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

Explain why: Transition metals and their compounds act as catalyst.

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

Write any four applications of f-block elements.

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

The total revenue in Rupees received from the sale of '

x

' units of a product is given by

R (x) = 3 x^{2} + 36 x + 5

. The marginal revenue, when

x = 15

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

Out of

{[{CoF}_{6}]}^{- 3}

and

[Co {(en)}_{3}]^{3 +}

, which complex compound more stable.

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

A stone is dropped into a quiet lake and waves move in circles at a speed of

4

cm per second. At the instant when the radius of the circular wave is

10

cm, how fast is the enclosed area increasing?

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

The total cost

C (x)

associated with the production of

x

units of an item is given by

C (x) = 0 \cdot 005 x^{3} - 0 \cdot 02 x^{2} + 30 x + 5000

. Find the marginal cost when

3

units are produced, where by marginal cost we mean the instantaneous rate of change of total cost at any level of output.

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

Find the rate of change of the area of a circle with respect to its radius

r

r = 6 cm .

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

Find the metallic and ferromagnetic substance.

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

The transition elements that has the lowest enthalpy of atomisation is:

MEDIUM

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

Write any three applications of

d

- and

f

-block elements.

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

Explain why: Transition elements form alloys.

EASY

Chemistry>Inorganic Chemistry>The d- and f-Block Elements>Position of d-Block and f-Block Elements in Periodic Table

Account for the following:

Zn, Cd, Hg

are considered as d-block elements but not as transition elements.

What does Trend Analysis in financial statement analysis primarily focus on?

Important Questions on The d- and f-Block Elements

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