The p-Block Elements Test

Result

The p-Block Elements Test - 56

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Weekly Quiz Competition

Question 1
1 / -0

The chemical name of borax is

A
Sodium orthoborate

B
Sodium metaborate

C
Sodium tetraborate

D
Sodium tetraborate decahydrate

Solution

The chemical name of borax is Sodium tetraborate decahydrate $$ (Na_2B_4 O_7 . 10 H_2 O) .$$
Question 2
1 / -0

In nature, carbon is found in elemental forms as:

A
Carbon dioxide and carbonates

B
Diamond and graphite

C
Hydrogen carbonates and graphite

D
Carbon dioxide and graphite

Solution

There are natural and synthetic diamonds. The Earth makes natural diamonds, and people make synthetic diamonds. Diamonds are the hardest natural substance known to man. Diamonds are made of pure carbon, the same chemical element as graphite. Natural graphite occurs in three distinct forms in the nature-crystalline, amorphous, and lump graphite.
Question 3
1 / -0

The tetrahedral nature of carbon was first given by

A
Kekule

B
Le Bell and Vant Hoff

C
Pauling

D
Armstrong and Bayer

Solution

The discovery of stereoisomerism is due to $$\text{Vant Hoff and Le Bel,} $$who proposed tetrahedral geometry to a carbon atom.
Question 4
1 / -0

Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g. hydrogen. After the formation of four bonds, carbon attains the electronic configuration of

A
helium

B
neon

C
argon

D
krypton

Solution

Electronic configuration of carbon is 2, 4 and after sharing four electrons from four univalent atoms, its electronic configuration becomes 2, 8 which is same as that of Neon.
Question 5
1 / -0

The correct statement is :

A
$$+5$$ oxidation state of H is more stable than its $$+3$$ oxidation state.

B
$$G^{2+}$$ is the better oxidizing agent than $$G^{4+}$$.

C
$$+3$$ oxidation state of H is more stable than its $$+5$$ oxidation state.

D
The ionization energy of G is greater than that of Tin.

Solution
Question 6
1 / -0

Which of the following compound is most acidic?

A
$$Cl_2O_7$$

B
$$P_4O_{10}$$

C
$$SO_3$$

D
$$B_2O_3$$

Solution

The oxidation state of non-metal increases the acidic nature of oxide increase $$Cl_2O_7$$ is more acidic.
Question 7
1 / -0

If P to T are second period p-block elements then which of the following graph show correct relation between valence electrons in $$P_2$$ to $$T_2$$ (corresponding molecules) and their bond order is :

A

B

C

D

Solution
Question 8
1 / -0

Which of the following statement is incorrect?

A
$$B_2C_5$$ is acidic in nature

B
$$AC_2$$ is acidic in nature

C
$$FC_3$$ is basic in nature

D
$$GC_2$$ is amphoteric in nature

Solution
Question 9
1 / -0

The oxidation number of carbon in diamond is:

A
$$zero$$

B
$$+4$$

C
$$-4$$

D
$$+2$$

Solution

The oxidation number of carbon in diamond is zero.
Question 10
1 / -0

In which of the following elements +3 oxidation state is most stable?

A
In

B
Ga

C
Al

D
TI

Solution

$$Al$$ is the most stable element in +3 oxidation state.