Hydrogen Test

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Hydrogen Test - 19

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Weekly Quiz Competition

Question 1
1 / -0

In the hydrogen peroxide molecule :

A
two hydrogen atoms are connected to one of the oxygen

B
all the four atoms are in the same plane

C
the four atoms are arranged in a non-linear and non-planar manner

D
$$O-H$$ bonds are polar but molecule is non-polar

Solution

Hydrogen peroxide $$(H_2O_2)$$ is a nonplanar molecule with (twisted) symmetry. It is non–linear, non–planar molecule with a open book structure. The $$–O–O–$$ linkage is called peroxy linkage. The structure is given in the figure above.
Question 2
1 / -0

In case of $$H_{2}O_{2}$$ in solid state, the angle between the planes containing $$H-$$atoms is:

A
$$100^{o}$$

B
$$90^{o}$$

C
$$109^{o}28^{'}$$

D
$$180^{o}$$

Solution

There are two planes in this structure and each plane has one O-H pair, the angle between both the planes is 90.2°, The O-O bond length is 145.8 pm and the O-H bond length is 98.8 pm.
Hence option B is correct.
Question 3
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In $$H_{2}O_{2}$$ molecule the O-O bond length is:

A
$$1.34 \mathring{A}$$

B
$$1.48 \mathring{A}$$

C
$$1.54 \mathring{A}$$

D
$$1.20 \mathring{A}$$

Solution

The bond length is slightly greater than length of a single bond, due to repulsion between the lone pairs of oxygen atoms.
Question 4
1 / -0

The angle between the planes of $$H_{2}O_{2}$$ molecule in gaseous phase is:

A
$$101.5^{o}$$

B
$$90^{o}$$

C
$$111.5^{o}$$

D
$$109^{o}28^{'}$$

Solution

$$C$$ is the correct option which can be seen from the diagram.
Question 5
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What is the solution used for the preparation of hydrogen peroxide by electrolytic procedure?

A
$$0.2 N NaOH$$

B
$$50$$% $$H_{2}SO_{4}$$

C
$$20$$% $$NaOH$$

D
$$5$$% $$NaCl$$

Solution

Hydrogen peroxide is manufactured by the electrolysis of 50% sulphuric acid followed by vacuum distillation. Here, 30% of pure hydrogen peroxide is obtained.
Option B is correct.
Question 6
1 / -0

In $$H_{2}O_{2}$$, the degree of hydrogen bonding is:

A
same as in water

B
more than in water

C
less than in water

D
zero

Solution

Due to the presence of two oxygen atoms in $$H_2O_2$$, there would be four hydrogen bonds corresponding to each molecule. Whereas, in water there would be only three hydrogen bonds per molecule.
Question 7
1 / -0

Hydrogen peroxide has a:

A
linear structure

B
closed chain structure

C
closed book structure

D
open book structure

Solution

The structure of $$H_2O _2$$ is not planar but open book structure. The O-O-H bond angle is 101.5$$^o$$ and the O-O single bond distance is 1.48 A$$^o$$.

Hence, option D is correct.
Question 8
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Statement-1: Both sodium and hydrogen have outer electronic configuration $$ns^{1}$$ but hydrogen is less reactive than sodium.
Statement-2: Hydrogen has greater ionisation energy.

A
Statement-1 is true, Statement-2 is true; Statement-2 is a correct explanation for Statement-1

B
Statement-1 is true, Statement-2 is True; Statement-2 is not a correct explanation for Statement-1

C
Statement-1 is true, Statement-2 is false

D
Statement-1 is false, Statement-2 is true

Solution

Both sodium and hydrogen is having same outer electronic configuration $$ns^1$$ but hydrogen have less reactivity because the ionization potential of $$Na$$ is less. Hence, it can loose its electron easily and participates in chemical reaction easily, so reason is the correct explanation for assertion so option A would be correct.
Question 9
1 / -0

$$30$$ volume hydrogen peroxide means:

A
$$30\%\:H_{2}O_{2}$$ solution

B
$$30\:\text{cm}^{3}$$ of the solution contains $$1$$ g of $$H_{2}O_{2}$$

C
$$1\:\text{cm}^{3}$$of the solution liberates $$30\:\text{cm}^{3}$$ of $$O_{2}$$ at STP

D
$$30\:\text{cm}^{3}$$ of the solution contains $$1$$ mole of $$H_{2}O_{2}$$

Solution

$$30$$ volume hydrogen peroxide means, $$1$$ ml of hydrogen peroxide solution liberates $$30$$ ml of oxygen gas at STP

$$1$$ ml $$= 1\:\text{cm}^3$$

Option C is correct.
Question 10
1 / -0

One ml of $$H_{2}O_{2}$$ solution gives $$50$$ ml of $$O_{2}$$ at NTP, so it is:

A
$$10$$ vol

B
$$25$$ vol

C
$$50$$ vol

D
$$100$$ vol

Solution

$$1$$ ml of hydrogen peroxide gives $$50$$ ml of oxygen at NTP means, $$50$$ volume hydrogen peroxide.

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Re-Attempt Weekly Quiz Competition

Hydrogen Test - 19

Result

Hydrogen Test - 19

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SHARING IS CARING

Question 1

two hydrogen atoms are connected to one of the oxygen

all the four atoms are in the same plane

the four atoms are arranged in a non-linear and non-planar manner

$$O-H$$ bonds are polar but molecule is non-polar

Solution

Question 2

$$100^{o}$$

$$90^{o}$$

$$109^{o}28^{'}$$

$$180^{o}$$

Solution

Question 3

$$1.34 \mathring{A}$$

$$1.48 \mathring{A}$$

$$1.54 \mathring{A}$$

$$1.20 \mathring{A}$$

Solution

Question 4

$$101.5^{o}$$

$$90^{o}$$

$$111.5^{o}$$

$$109^{o}28^{'}$$

Solution

Question 5

$$0.2 N NaOH$$

$$50$$% $$H_{2}SO_{4}$$

$$20$$% $$NaOH$$

$$5$$% $$NaCl$$

Solution

Question 6

same as in water

more than in water

less than in water

zero

Solution

Question 7

linear structure

closed chain structure

closed book structure

open book structure

Solution

Question 8

Statement-1 is true, Statement-2 is true; Statement-2 is a correct explanation for Statement-1

Statement-1 is true, Statement-2 is True; Statement-2 is not a correct explanation for Statement-1

Statement-1 is true, Statement-2 is false

Statement-1 is false, Statement-2 is true

Solution

Question 9

$$30\%\:H_{2}O_{2}$$ solution

$$30\:\text{cm}^{3}$$ of the solution contains $$1$$ g of $$H_{2}O_{2}$$

$$1\:\text{cm}^{3}$$of the solution liberates $$30\:\text{cm}^{3}$$ of $$O_{2}$$ at STP

$$30\:\text{cm}^{3}$$ of the solution contains $$1$$ mole of $$H_{2}O_{2}$$

Solution

Question 10

$$10$$ vol

$$25$$ vol

$$50$$ vol

$$100$$ vol

Solution

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