Hydrogen MCQ Questions & Answers in Inorganic Chemistry | Chemistry
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81.
Which of the following statements do not define the characteristic property of water “Water is a universal solvent”
A
It can dissolve maximum number of compounds
B
It has very low dielectric constant
C
It has high liquid range
D
None of these
Answer :
It has very low dielectric constant
Water has high dielectric constant i.e., $$78.39\,{C^2}/N{m^2},$$ high liquid range and can dissolve maximum number of compounds. That is why it is used as universal solvent.
82.
Hydrogen peroxide in its reaction with $$KI{O_4}$$ and $$N{H_2}OH$$ respectively, is acting as a
A
Reducing agent, oxidising agent
B
Reducing agent, reducing agent
C
Oxidising agent, oxidising agent
D
Oxidising agent, reducing agent
Answer :
Reducing agent, oxidising agent
$$\eqalign{
& KI{O_4} + {H_2}{O_2} \to KI{O_3} + {H_2}O + {O_2} \cr
& {\text{Thus}}\,{H_2}{O_2}\,{\text{is acting as a reducing agent}} \cr
& 2N{H_2}OH + {H_2}{O_2} \to {N_2} + 4{H_2}O \cr
& {\text{Here}}{H_2}{O_2}\,{\text{is acting as an oxidising agent}} \cr} $$
83.
Match the column I with column II and mark the appropriate choice.
Column I
Column II
a.
$$NaH$$
1.
Interstitial hydride
b.
$$C{H_4}$$
2.
Molecular hydride
c.
$$V{H_{0.56}}$$
3.
Ionic hyydride
d.
$${B_2}{H_6}$$
4.
Electron-deficient hydride
A
a - 3, b - 4, c - 2, d - 1
B
a - 2, b - 4, c - 3, d - 1
C
a - 1, b - 2, c - 4, d - 3
D
a - 3, b - 2, c - 1, d - 4
Answer :
a - 3, b - 2, c - 1, d - 4
No explanation is given for this question. Let's discuss the answer together.
84.
What will be the strength of $$20\,vol$$ of $${H_2}{O_2}$$ in terms of gram per litre?
A
$$60.71\,g\,{L^{ - 1}}$$
B
$$5.6\,g\,{L^{ - 1}}$$
C
$$30.62\,g\,{L^{ - 1}}$$
D
$$17\,g\,{L^{ - 1}}$$
Answer :
$$60.71\,g\,{L^{ - 1}}$$
$$20\,vol$$ of $${H_2}{O_2}$$ means :
$$1\,L$$ of this $${H_2}{O_2}$$ will give $$20\,L$$ of oxygen at $$STP.$$
$$\mathop {2{H_2}{O_2}}\limits_{2 \times 34} \,\,\,\,\, \to \mathop {{O_2}}\limits_{22.4\,L\,\,{\text{at}}\,\,STP} + {H_2}O$$
$$22.4\,L$$ of $${{O_2}}$$ is produced from $$68\,g$$ of $${H_2}{O_2}$$
$$20\,L$$ of $${{O_2}}$$ is produced from $$ = \frac{{68 \times 20}}{{22.4}} = 60.71\,g\,{L^{ - 1}}$$ of $${H_2}{O_2}.$$
85.
Which of the following is not an isotope of hydrogen ?
A
Protium
B
$$Ortho-para$$ hydrogen
C
Deuterium
D
Tritium
Answer :
$$Ortho-para$$ hydrogen
$$Ortho-para$$ hydrogen are spin isomers of hydrogen. Hydrogen has 3 isotopes : Protium $$\left( {_1^1H} \right),$$ Deuterium $$\left( {_1^2D} \right),$$ Tritium $$\left( {_1^3T} \right).$$
86.
Match the column I with column II and mark the appropriate choice.
Column I
Column II
a.
syngas
1.
$$N{a_6}{P_6}{O_{18}}$$
b.
Calgon
2.
$$NaAlSi{O_4}$$
c.
Permutit
3.
$$CO + {H_2}$$
d.
Producer gas
4.
$$CO + {N_2}$$
A
a - 1, b - 2, c - 3, d - 4
B
a - 3, b - 1, c - 2, d - 4
C
a - 3, b - 2, c - 4, d - 1
D
a - 3, b - 2, c - 1, d - 4
Answer :
a - 3, b - 1, c - 2, d - 4
No explanation is given for this question. Let's discuss the answer together.
87.
Among $$N{H_3},{H_2}O,HF$$ and $${H_2}S$$ which would have highest magnitude of hydrogen bonding?
A
$$HF$$ due to maximum polarity.
B
$${H_2}O$$ due to lone pairs of electrons.
C
$$N{H_3}$$ due to small size of nitrogen.
D
$${H_2}S$$ due to higher electron affinity of sulphur.
Answer :
$$HF$$ due to maximum polarity.
Since $$H - F$$ bond has maximum polarity due to most electronegative nature of fluorine. hydrogen bonding is maximum in $$HF$$ molecules.
88.
Polyphosphates are used as water softening agents because they
A
form soluble complexes with anionic species
B
precipitate anionic species
C
form soluble complexes with cationic species
D
precipitate cationic species
Answer :
form soluble complexes with cationic species
Polyphosphates form soluble complexes with $$C{a^{2 + }}$$ and $$M{g^{2 + }}$$ and are removed.
90.
An inorganic compound gives off $${O_2}$$ when heated, turns an acidic solution of $$KI$$ violet and reduces acidified $$KMn{O_4}.$$ The compound is