The p-Block Elements Test

Result

The p-Block Elements Test - 53

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Weekly Quiz Competition

Question 1
1 / -0

Carbon shows tetravalency due to:

A
$$s^2 p^2$$ hybridization

B
$$d^3 p$$ hybridization

C
$$dsp^2 $$ hybridization

D
$$sp^3 $$ hybridization

Solution
Question 2
1 / -0

Carbon atoms in diamond are bonded with each other in a configuration:

A
linear

B
planar

C
octahedral

D
tetrahedral

Solution

Diamond is the hardest material known on earth. Each carbon atom is surrounded by four other carbon atoms, which lie at the corner of a regular tetrahedron. Valence bond connects each carbon atom with four others. Carbon atoms in diamond are $$sp^3$$ hybridized.

Hence the correct option is $$(D)$$.
Question 3
1 / -0

Which one is borax?

A
$$Na_2B_4O_7 \cdot 10H_2O$$

B
$$Na_2B_4O_7 \cdot 4H_2O$$

C
$$Ca_2B_6O{11} \cdot 5H_2O$$

D
$$CaB_4O_7$$

Solution
Question 4
1 / -0

What is the general electronic configuration of group $$14$$ or $$IVA$$ elements:

A
$$ns^2\ np^4$$

B
$$ns^2\ np^2$$

C
$$ns^2\ np^6$$

D
$$ns^2$$

Solution
Question 5
1 / -0

Which of the following is a semiconductor?

A
$$C$$

B
$$Pb$$

C
$$Ge$$

D
$$Sn$$

Solution

Germanium (Ge) is a semi-conductor.
Question 6
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Which of the following oxides has three dimensional structure?

A
$$CO$$

B
$$CO_2$$

C
$$SiO_2$$

D
$$SO_2$$
Solution
$$CO, CO_2$$ are linearly shaped molecules whereas $$SO_2$$ is a $$bent$$ shaped molecule.

$$SiO_2$$ has a $$three-dimensional$$ structure as $$Si$$ in $$SiO_2$$ is $$sp^3$$ hybridised with no lone pairs. Silicon dioxide is a covalent, network solid in which each silicon atom is tetrahedrally surrounded by 4 oxygen atoms
Option C is correct.
Question 7
1 / -0

In silicon dioxide:

A
there are double bonds between silicon and oxygen atoms

B
each silicon atom is surounded by four oxygen atoms and each oxygen atom is bounded to two silicon atoms

C
silicon is bounded to two silicon atoms

D
Each silicon atom is surounded by two oxygen atoms and each oxygen atom is bounded to two silicon atoms

Solution
Question 8
1 / -0

Which of the following is a covalent carbide?

A
$$CaCO_3$$

B
$$Al_4C_3$$

C
$$WC$$

D
$$SiC$$

Solution
Question 9
1 / -0

Which silicon compounds is used as lubricant?

A
Asbestos

B
Silicone

C
Zeolite

D
Mica

Solution
Question 10
1 / -0

In silicon oxide:

A
each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms

B
each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bonded to two silicon atoms

C
silicon atoms is bonded to two oxygen atoms

D
there are double bonds between silicon and oxygen atoms

Solution

The tetravalency of $$Si$$ is surrounded by four oxygen atoms. Much of the silicon and oxygen in the Earth’s crust is present as the compound silicon dioxide also known as silica.