Hydrogen Test

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Hydrogen Test - 28

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Weekly Quiz Competition

Question 1
1 / -0

The adsorption of hydrogen by metals is called:

A
Dehydrogenation

B
Hydrogenation

C
Occlusion

D
Adsorption

Solution

Correct option: C
Occlusion is the phenomenon of adsorption of hydrogen on metal surface.
Question 2
1 / -0

Hydrogen peroxide has a

A
linear structure

B
closed chain structure

C
closed book type structure

D
half open book type 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 $$A^o$$
Question 3
1 / -0

Water boils and freezes exactly at 100ºC and 0ºC respectively; find the reason for it from the following

A
Water desolve anything however springly the dissolution will be

B
Water is a polar molecule

C
Boiling and freezing temperature of water is used to define temperature scales

D
none of these

Solution

This is a fact that boiling and freezing temperature of water at atmospheric pressure is used to define temperature scale as it makes easy.
Question 4
1 / -0

Hydrogen is :

A
electropositive

B
electronegative

C
both electronpositive as well as electronegative

D
neither electropositive nor electronegative
Question 5
1 / -0

Which gas is produced when steam is passed over red hot coke?

A
Producer gas

B
CNG

C
Water gas

D
LPG

Solution
Question 6
1 / -0

Lead pipe for supplying the drinking water are:

A
not safe

B
quite safe

C
may be safe for some countries

D
nothing can be said about it

Solution

Lead pipes for supplying the drinking water are not safe. The lead concentration in drinking water should be below ETA level of 15 ppm. If we will use lead pipes, it will increase the lead concentration above critical level, hence, should not be used. Use of lead pipes were banned in year 1970 due to safety purposes.
Question 7
1 / -0

$$H_2O_2$$ is formed by which of the following compound?

A
$$Na_2O_2$$

B
$$NaOH$$

C
$$Na_2O$$

D
$$KO_2$$

Solution

$$Na_2 O_2 + \underset{(Cold)}{H_2SO_4} \rightarrow NaSO_4 + H_2 O_2$$
$$\therefore Na_2O_2$$ on reaction with $$H_2SO_4$$ produces $$H_2O_2$$.
Question 8
1 / -0

Water exists both as solid and liquid at:

A
$${100}^{o}C$$

B
$${50}^{o}C$$

C
$${2.5}^{o}C$$

D
$${0}^{o}C$$

E
$$-{10}^{o}C$$

Solution

Water exists both as solid and liquid at $$0^oC$$.
The melting point of ice at atmospheric pressure is
$$0^oC$$. At this temperature ice is in equilibrium with liquid water.
Question 9
1 / -0

Hydrogen loses its electron to form $$H^+$$. In this respect, it resembles:

A
halogens

B
alkali metals

C
transition element

D
alkaline earth metals

Solution

Alkali metals have one electron present in their outer shell in group I so after losing one electron they become stable ions similarly hydrogen has lone electron in its shell after losing it shares the same character as alkali metal group.
Question 10
1 / -0

Temporary hardness of water is due to the presence of:

A
Magnesium bicarbonate

B
Calcium chloride

C
Magnesium sulphate

D
Calcium carbonate

Solution

Permanent hardness is the hardness that cannot be removed by boiling. It is usually caused by the presence of calcium sulphate or magnesium sulphates or chlorides, nitrates of $$Ca$$,$$Mg$$ in the water which does not precipitate out as the temperature increases.

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Re-Attempt Weekly Quiz Competition

Hydrogen Test - 28

Result

Hydrogen Test - 28

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SHARING IS CARING

Question 1

Dehydrogenation

Hydrogenation

Occlusion

Adsorption

Solution

Question 2

linear structure

closed chain structure

closed book type structure

half open book type structure

Solution

Question 3

Water desolve anything however springly the dissolution will be

Water is a polar molecule

Boiling and freezing temperature of water is used to define temperature scales

none of these

Solution

Question 4

electropositive

electronegative

both electronpositive as well as electronegative

neither electropositive nor electronegative

Question 5

Producer gas

CNG

Water gas

LPG

Solution

Question 6

not safe

quite safe

may be safe for some countries

nothing can be said about it

Solution

Question 7

$$Na_2O_2$$

$$NaOH$$

$$Na_2O$$

$$KO_2$$

Solution

Question 8

$${100}^{o}C$$

$${50}^{o}C$$

$${2.5}^{o}C$$

$${0}^{o}C$$

$$-{10}^{o}C$$

Solution

Question 9

halogens

alkali metals

transition element

alkaline earth metals

Solution

Question 10

Magnesium bicarbonate

Calcium chloride

Magnesium sulphate

Calcium carbonate

Solution

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