The p-Block Elements Test

Result

The p-Block Elements Test - 13

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Weekly Quiz Competition

Question 1
1 / -0

Boric acid is prepared from borax by the action of

A
$$HCl$$

B
$$NaOH$$

C
$$CO_{2}$$

D
$$Na_{2}CO_{3}$$

Solution

Boric acid is prepared by the action of $$HCl$$ on borax. The reaction is as follows:
$$Na_2B_4O_7 + 2HCl + 5H_2O \rightarrow 2NaCl + 4H_3BO_3$$
Question 2
1 / -0

$$Na_{2}B_{4}O_{7.}\, 10\, H_{2}O$$ is:

A
Borax

B
Kernite

C
Glauber salt

D
Colemanite

Solution

$$Na_{2}B_{4}O_{7.}\, 10\, H_{2}O$$ is borax..

Option A is correct.
Question 3
1 / -0

Which of the following molecules is nonpolar?
(i)$$PbCl_4$$
(ii)$$BF_3$$
(iii)$$SnCl_2$$
(iv)$$CS_2$$

A
(i), (ii), (iii)

B
(i), (ii), (iii), (iv)

C
(i), (ii), (iv)

D
(ii), (iii), (iv)

Solution
Question 4
1 / -0

An element 'X' atomic number 51 belongs to ______.

A
s-block

B
p-block

C
d-block

D
f-block
Question 5
1 / -0

Indite is a mineral for the production of ______.

A
indium

B
aluminium

C
boron

D
gallium

Solution

Indite is an extremely rare indium-iron sulfide mineral, found in Siberia. Its chemical formula is $$Fe{In}_2S_4$$.
Question 6
1 / -0

Pure air contains nitrogen, oxygen and small amounts of other gases. The noble gases have been left out of the table.
Which row shows the composition of dry, unpolluted air?

A
nitrogen/ % - 21 ; oxygen/ % - 78; other gases - small amount of carbondioxide

B
nitrogen/ % - 21 ; oxygen/ % - 78; other gases - small amount of carbon monoxide

C
nitrogen/ % - 78 ; oxygen/ % - 21; other gases - small amount of carbon dioxide

D
nitrogen/ % - 7 ; oxygen/ % - 21; other gases - small amount of carbon monoxide

Solution

$$\text{atmosphere contain}$$
$$\text{Nitrogen-78%}$$
$$\text{Oxygen-21%}$$
Question 7
1 / -0

Which has an electron configuration $$1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}$$?

A
$$Na^{+}$$

B
$$Al$$

C
$$F$$

D
$$Ti$$

E
$$B$$

Solution

Option $$(A)$$ is correct.
$$Al$$ has an electron configuration $$1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}$$.Atomic no. of aluminium is 13.
Question 8
1 / -0

In the ground state the carbon atom has .... unpaired electron/ electrons:

A
$$2$$

B
$$3$$

C
$$4$$

D
$$no$$

Solution
Question 9
1 / -0

Which of the following member of the carbon family does not have an allotrope?

A
$$Si$$

B
$$Sn$$

C
$$C$$

D
$$Ge$$

Solution

In carbon family only carbon, silicon and tin forms allotrope. Carbon has multiple allotrope, Silicon has two known allotropes that exist at room temperature and Tin also has two allotropes.Ge does not have an allotrope.
Question 10
1 / -0

Tincal contains mainly :

A
$$NaNO_{3}$$

B
$$Na_{2}B_{4}O_{7}.10H_{2}O$$

C
$$Na_{2}CO_{3}$$

D
$$Na_{2}SO_{4}$$

Solution

Tincal mainly contains $$Na_2B_4O_7\cdot 10H_2O$$. It is borax or sodium tetraborate or sodium borate.

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The p-Block Elements Test - 13

Result

The p-Block Elements Test - 13

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Question 1

$$HCl$$

$$NaOH$$

$$CO_{2}$$

$$Na_{2}CO_{3}$$

Solution

Question 2

Borax

Kernite

Glauber salt

Colemanite

Solution

Question 3

(i), (ii), (iii)

(i), (ii), (iii), (iv)

(i), (ii), (iv)

(ii), (iii), (iv)

Solution

Question 4

s-block

p-block

d-block

f-block

Question 5

indium

aluminium

boron

gallium

Solution

Question 6

nitrogen/ % - 21 ; oxygen/ % - 78; other gases - small amount of carbondioxide

nitrogen/ % - 21 ; oxygen/ % - 78; other gases - small amount of carbon monoxide

nitrogen/ % - 78 ; oxygen/ % - 21; other gases - small amount of carbon dioxide

nitrogen/ % - 7 ; oxygen/ % - 21; other gases - small amount of carbon monoxide

Solution

Question 7

$$Na^{+}$$

$$Al$$

$$F$$

$$Ti$$

$$B$$

Solution

Question 8

$$2$$

$$3$$

$$4$$

$$no$$

Solution

Question 9

$$Si$$

$$Sn$$

$$C$$

$$Ge$$

Solution

Question 10

$$NaNO_{3}$$

$$Na_{2}B_{4}O_{7}.10H_{2}O$$

$$Na_{2}CO_{3}$$

$$Na_{2}SO_{4}$$

Solution

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