The p-Block Elements Test

Result

The p-Block Elements Test - 68

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Weekly Quiz Competition

Question 1
1 / -0

Borax structure contains?

A
two $$BO_{4}$$ groups and two $$BO_{3}$$ groups

B
four $$BO_{4}$$ groups only

C
four $$BO_{3}$$ groups only

D
three $$BO_{4}$$ groups and one $$BO_{3}$$ groups

Solution
Question 2
1 / -0

Match column-I with column-II and mark the appropriate choice.
Column-I Column-II
P Borax i $$Na_3AlF_6$$
Q Inorganic benzene ii $$Na_2B_4O_7.10H_2O$$
R Cryolite iii $$Al_2O_3.2H_2O$$
S Bauxite iv $$B_3N_3H_6$$

A
P-ii, Q-iv, R-i, S-iii

B
P-i, Q-ii, R-iii, S-iv

C
P-ii, Q-iii, R-i, S-iv

D
P-ii, Q-i, R-iv, S-iii

Solution
Question 3
1 / -0

$$\mathrm { SiO } _ { 2 }$$ can react with:

A
$$NaOH$$ only

B
$$HF$$ only

C
Neither $$HF$$ nor $$NaOH$$

D
Both $$HF$$ and $$NaOH$$

Solution

Silicon dioxide reacts with sodium hydroxide to product sodium silicon and water. This reaction takes place at a temperature of $$900-1000\ ^oC$$
$$2NaOH+S:O_{2}\longrightarrow Na_{2}S:O_{3}+H_{2}O$$
Silicon dioxide reacts with hydrogen fluroide to produce hydrogen hexafluro silicate & water
$$S:O_{2}+6HF\longrightarrow H_{2}[S:F_{6}]+2H_{2}O$$
$$S:O_{2}$$ definitely reacts with strong bases like $$NaOH$$
$$S:O_{2}$$ is a very stable compound, and therefore it can also react with $$HF$$.
Question 4
1 / -0

The correct polymerization tendency order of oxoanions of third period non-metal is:

A
$$Si>P>S>Cl$$

B
$$Cl>S>P>Si$$

C
$$P>Si>Cl>S$$

D
$$S>P>Cl>Si$$
Question 5
1 / -0

Graphite is soft while diamond is hard because:

A
graphite is in powder form.

B
diamond has $$sp^{2}$$- hybridisation but graphite has $$sp^{3}$$-hybridisation.

C
graphite is in planar form while diamond is in tetrahedral form.

D
graphite is covalent and diamond is ionic.

Solution
Question 6
1 / -0

The correct order of atomic radii of group 13 elements is:

A
$$B < Al < Ga < In$$

B
$$B < Ga < Al < In$$

C
$$B < Al < Ga $$$$ \sim $$$$ In$$

D
$$B < Al $$ $$ \sim $$ $$Ga > In$$
Question 7
1 / -0

Select correct order:-

A
$$F_2 > Cl_2 > Br_2 > I_2$$ (order of bond energy)

B
$$O > S > Se > Te$$ (Order of tendency of catenation)

C
$$BF_3 > BCl_3 > BBr_3 > BI_3$$ ( Order of lewis acidic strength)

D
$$p-Nitrophenol < o-Nitrophenol$$ (Order of vapour pressure)
Question 8
1 / -0

$$BF_{3}$$ on hydrolysis forms

A
$$H_{3}BO_{3}$$

B
$$HBF_{4}$$

C
Both $$(A)$$ and $$(B)$$

D
None of these

Solution
Question 9
1 / -0

In the group $$14$$ elements, the elements other than carbon do not form $$p\pi-p\pi $$ bonds because the atomic orbitals are:

A
Large and diffused to undergo effective lateral overlap.

B
Small and diffused to undergo effective lateral overlap.

C
Large and far too less diffuse to overlap linearly.

D
Small and far too less diffuse to overlap linearly.

Solution
Question 10
1 / -0

What is correct statement among the following about the structure of borax molecule?

A
all the four boron atoms are $$s{p^3}$$-hybridized

B
all the four boron atoms are $$s{p^2}$$- hybridized

C
two of the four boron atoms are $$s{p^3}$$-hybridized and the other two are $$s{p^2}$$-hybridized

D
Out of the 10 water molecules generally shown as water of crystallization in its MF,4 molecules of $${H_2}O$$ are really involved in the structural formation

Solution