Hydrogen Test

Result

Hydrogen Test - 27

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

The structure of $$H_{2}O_{2}$$ is:

A
planar

B
non-planar

C
spherical

D
linear

Solution

The structure of $$H_{2}O_{2}$$ is open book shaped, and thus non-planar.
Question 2
1 / -0

When hydrogen burns in oxygen, water is formed. The type of chemical change involved is:

A
combustion

B
evaporation

C
displacement

D
decomposition

Solution

The reaction for the same is
$${ H }_{ 2\left( q \right) }+\dfrac { 1 }{ 2 } { O }_{ 2\left( q \right) }\longrightarrow { H }_{ 2 }{ O }_{ \left( q \right) }$$
The type of chemical change involved is combustion because combustion is burning of reactant in the pressure of oxygen.
$$\rightarrow $$ Here $${ H }_{ 2 }$$ burned in pressure of $${ O }_{ 2 }\rightarrow { H }_{ 2 }O$$
Question 3
1 / -0

In all its properties, hydrogen resembles:

A
alkali metals only

B
halogens only

C
both alkali metals and halogens

D
neither alkali metals nor halogens

Solution

Hydrogen resembles alkali metals and halogens in all its properties. The electronic configuration of hydrogen, alkali metals and halogens are $$1s^1, ns^1$$ and $$ns^2, np^3$$ respectively. All are short by one electron from noble gas configuration. Hence, all have similar chemical properties.
Question 4
1 / -0

Water in its pure form is a:

A
good conductor of heat

B
bad conductor of electricity

C
good conductor of electricity

D
none of these

Solution

Water in pure form is a bad conductor of electricity because of the absence of free electrons (salts and minerals) that allow the flow of electricity.
Question 5
1 / -0

Saline water is useful for:

A
washing clothes

B
drinking

C
for agriculture

D
None of these

Solution

Saline water is not useful for washing clothes, drinking purposes and also for agriculture purposes.
Saline water is not useful for drinking as it contains high levels of salts in it.
It cannot be used for agriculture. Irrigation with saline water can result in dangerous levels of salinity building up in the root zones of the crops.
Hence, the correct option is (D).
Question 6
1 / -0

Pure water is a ________ conductor of electricity.

A
good

B
bad

C
semi

D
very good

Solution

Pure water is a bad conductor of electricity. This is because free electrons are not present in pure water which allow the flow of electricity. Pure water is a bad conductor of electricity.
Question 7
1 / -0

When we heat water, we can find bubbles coming from it. This shows that:

A
water contains air

B
air contains water

C
hot water becomes bubbles

D
None of these

Solution

When we heat water, we can find bubbles coming from it. This is because the solubility of gases decreases as the temperature increases and that is why the dissolved air bubbles go out from the water. Then as the boiling point of the water is reached ($$100^{\circ}C$$), water vapour starts to form inside the liquid in the form of bubbles.
Hence, option (A) is correct.
Question 8
1 / -0

The volume strength of $$H_2O_2$$ solution is 10. It means:

A
at S.T.P. 10 g solution of $$H_2O_2$$ gives 10 mL of $$O_2$$

B
at S.T.P. 1 g equivalent of $$H_2O_2$$ gives 10 mL of $$O_2$$

C
at ST.P. 10 litre solution of $$H_2O_2$$ gives 10 mL of $$O_2$$

D
at S.T.P. 1 mL solution of $$H_2O_2$$ gives 10 mL of $$O_2$$

Solution

The volume strength of $$ H_2O_2$$ solution is 10 means that at S.T.P. 1 mL solution of $$H_2O_2$$ gives 10 mL of $$O_2$$
Question 9
1 / -0

Ionic hydrides are usually:

A
good electrical conductors when solid

B
easily reduced

C
good reducing agents

D
liquid at room temperature

Solution

Ionic hydrides are usually good reducing agents.
$$2CO+NaH \rightarrow HCOONa+C$$
$$PbSO_4+2CaH_2 \rightarrow PbS + 2Ca(OH)_2$$
$$Fe_3O_4 + NaH \rightarrow 3Fe +4 NaOH$$
Question 10
1 / -0

Which of the following is a true structure of $$H_{2}O_{2}$$ ?

A

B

C

D

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 $$1.48$$ $$A^o$$.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Hydrogen Test - 27

Result

Hydrogen Test - 27

Score

-

Rank

-

SHARING IS CARING

Question 1

planar

non-planar

spherical

linear

Solution

Question 2

combustion

evaporation

displacement

decomposition

Solution

Question 3

alkali metals only

halogens only

both alkali metals and halogens

neither alkali metals nor halogens

Solution

Question 4

good conductor of heat

bad conductor of electricity

good conductor of electricity

none of these

Solution

Question 5

washing clothes

drinking

for agriculture

None of these

Solution

Question 6

good

bad

semi

very good

Solution

Question 7

water contains air

air contains water

hot water becomes bubbles

None of these

Solution

Question 8

at S.T.P. 10 g solution of $$H_2O_2$$ gives 10 mL of $$O_2$$

at S.T.P. 1 g equivalent of $$H_2O_2$$ gives 10 mL of $$O_2$$

at ST.P. 10 litre solution of $$H_2O_2$$ gives 10 mL of $$O_2$$

at S.T.P. 1 mL solution of $$H_2O_2$$ gives 10 mL of $$O_2$$

Solution

Question 9

good electrical conductors when solid

easily reduced

good reducing agents

liquid at room temperature

Solution

Question 10

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.