The p-Block Elements Test

Result

The p-Block Elements Test - 74

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following statements is not correct?

A
Argon is used in electric bulbs

B
Krypton is obtained during radioactive disintegration

C
Half life of radon is only 3.8 days

D
Helium is used in producing very low temperatures

Solution
Question 2
1 / -0

Consider the following reaction,
$$NO_2 +NaOH \to (A)+(B)+H_2O$$
which of the following is correct?

A
both $$(A)$$ and $$(B)$$ on heating with $$Na$$ from $$N_2$$

B
both $$(A)$$ and $$(B)$$ on treatment with$$Zn$$ and $$NaOH$$ produce $$NH_3$$

C
both are correct

D
none is correct

Solution
Question 3
1 / -0

Electron affinity of noble gas element is:

A
very high

B
high

C
low

D
zero

Solution
Question 4
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Of the following species, one which is non-existent:

A
$$XeF_6$$

B
$$XeF_5$$

C
$$XeF_4$$

D
$$XeF_2$$

Solution
Question 5
1 / -0

What is formed xenon combines with fluorine in the pressure of mercury vapour?

A
$$XeF$$

B
$$Xe_2F$$

C
$$XeF_2$$

D
$$XeF_4$$

Solution
Question 6
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Which of the following is not correct?

A
$$XeO_3$$ has four $$\sigma$$ and four $$\pi$$ bonds.

B
The hybridization of $$Xe$$ in $$XeF_4$$ is $$sp^3d^2$$.

C
Among noble gases, the occurrence of argon is highest in air.

D
Liquid helium is used as cryogenic liquid.

Solution
Question 7
1 / -0

The fluoride of xenon with zero dipole moment is:

A
$$XeF_6$$

B
$$XeOF_4$$

C
$$XeF_4$$

D
$$XeO_2F_2$$

Solution

$$XeF_4$$ is symmetrical with a square planar shape, so the resultant dipole moment is zero
Question 8
1 / -0

For $$NH_2OH.HCl +NaNO_2 \to (B) \xrightarrow {Cu} (X)_{gas}$$. Which of the following is correct?

A
$$(B)$$ is an amphoteric oxide

B
$$(X)$$ is a colourless, diamagnetic gas which combines with $$Al$$ on heating

C
$$(X)$$ can be produced by action of $$(Zn +NaOH)$$ on $$NaNO_2$$

D
none of the above

Solution
Question 9
1 / -0

The formation of $$O_2^+[PtF_6]^-$$ is the basis for the formation of xenon fluorides. This is because

A
$$O_2$$ and $$Xe$$ have comparable sizes

B
Both $$O_2$$ and $$Xe$$ are gases

C
$$O_2$$ and $$Xe$$ have comparable ionisation energies

D
Both (a) and (c)

Solution
Question 10
1 / -0

In which of these processes platinum is used as a catalyst?

A
Oxidation of ammonia to form $$ HNO_3 $$

B
Hardening of oils

C
Production of synthetic rubber

D
Synthesis of methanol

Solution

Platinum acts as a catalyst in the oxidation of ammonia to form nitric oxide. This reaction is used in Ostwald's method of nitric acid preparation.

$$ 4NH_3+ 5O_2 \xrightarrow { 750^0C ;\ Pt-catalyst } 4NO + 6H_2 O $$

$$ 2 NO + O_2 \rightarrow 2NO_2 $$

$$ 4NO_2 +O_2 + 2H_2O \rightarrow 4HNO_3 $$