Hydrogen Test

Result

Hydrogen Test - 69

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Weekly Quiz Competition

Question 1
1 / -0

Which represent only amphiprotic species ?

A
$${ H }_{ 3 }^{ + }O,{ H }PO_{ 4 }^{ 2- },{ H }CO_{ 3 }^{ - }$$

B
$$H_2O,{ HPO }_{ 3 }^{ 2- },{ H_{ 2 }PO }_{ 2 }^{ - }$$

C
$${ HSO }_{ 4 }^{ - },{ H }_{ 2 }{ PO }_{ 4 }^{ - },{ H }_{ 2 }{ PO }_{ 3 }^{ - }$$

D
All of these

Solution
Question 2
1 / -0

Pair of amphiprotic species is :

A
$$H_2CO_3$$ and $${ HCO }_{ 3 }^{ - }$$

B
$$H_2CO_3$$ and $$H_2O$$

C
$${ CO }_{ 3 }^{ 2- }$$ and $$H_3O^+$$

D
$${ HCO }_{ 3 }^{ - }$$ and $$H_2O$$

Solution
Question 3
1 / -0

Water is a :

A
protophobic solvent

B
protophilic solvent

C
amphiprotic solvent

D
aprotic solvent

Solution
Question 4
1 / -0

An oxide of a non-metal has the following properties:
(i) acts both as a proton donor as well as proton acceptor
(ii) it reacts readily with basic and acidic oxides
(iii) it oxidises $$Fe$$ at its boiling point.
The oxide is:

A
$$P_{2}O_{5}$$

B
$$SiO_{2}$$

C
$$H_{2}O$$

D
$$CO_{2}$$

Solution
Question 5
1 / -0

Which of the following is a true structure of $$H_2O_2$$?

A

B

C

D

Solution

Answer :B

Open book structure (Non-polar).
Question 6
1 / -0

Which one of the following pairs of substances on reaction will not evolve $$H_2$$ gas?

A
Iron and dil $$H_2SO_4$$

B
Iron and steam

C
Copper and $$HCl(g)$$

D
Sodium and ethyl alcohol

Solution

Ans. $$(C)Copper$$ and $$ HCl(gas) $$

A.Iron metal dissolves readily in dilute sulphuric acid in the absence of oxygen to form solutions containing the aquated Fe(II) ion together with evolution of hydrogen.

$$ Fe(s) + H_{2}SO_{4}(aq) \rightarrow Fe^{2+} + SO^{2-}_{4}(aq) + H_{2}(g)$$

B. Iron on reaction with steam creating a layer of hydrated iron oxide over the iron and release hydrogen.

$$ 3Fe + 4H_{2}O \rightarrow Fe_{3}O_{4} + 4H_{2}$$

C. Copper reacts with HCl in aqueous form not reacts if it is in gas form.So,this reaction is not possible.

D.Ethanol react with Sodium to produce sodium ethoxide and hydrogen gas.

$$CH_{3}CH_{2}OH + Na \rightarrow CH_{3}CH_{2}O^{-}Na^{+} + H_{2}$$
Question 7
1 / -0

In which of the properties listed below, hydrogen does not show similarity with halogens?
I. Nature of the oxide
II. Electropositive character
III. Combination with alkali metals
IV. Atomicity

A
$$I$$ and $$II$$

B
$$III$$ and $$IV$$

C
$$II$$ only

D
$$I$$ and $$III$$

Solution

Hydrogen forms a neutral oxide, ie., $$H_2O$$ ( water) while the oxides of halogens are acidic.

Hydrogen shows electropositive nature also while halogens are mostly electronegative in nature.

Option A is correct.
Question 8
1 / -0

When electric current is supplied through an ionic hydride of fused state, then:

A
Hydrogen is obtained at anode

B
Hydrogen is obtained at cathode

C
No change

D
Hydride ion moves towards cathode

E
Hydride ion present in solution

Solution

On electrolysis of fused ionic hydride $$(LiH)$$, hydrogen obtained at anode.

$$MH+H_2O \to MOH +H_2 \uparrow$$

Option A is correct.
Question 9
1 / -0

Which of the following statements do not define the characteristic property of water "Water is a universal solvent".

A
It can be dissolve maximum number of compounds

B
It has very low dielectric constant

C
It has high liquid range

D
None of these

Solution

Water has high dielectric constant i.e., 82, high liquid range and can dissolve the maximum number of compounds. That is why it is used as a universal solvent.
Question 10
1 / -0

Hydrogen accepts an electron to form inert gas configuration. In this it resembles

A
Halogen

B
Alkali metals

C
Chalcogens

D
Alkaline earth metals

Solution

Hydrogen accepts an electron to form inert gas configuration. In this, it resembles halogen as like halogen it gains 1 electron and attains noble gas configuration.

$$H+e\to H^- \to [He]$$

$$F+e\to F^- \to [Ne]$$