CBSE Questions for Class 11 Medical Chemistry Hydrogen Quiz 13 - MCQExams.com

The strength of $$  \mathrm{H}_{2} \mathrm{O}_{2}  $$ (in $$g/litre$$) in $$11.2 $$ volume solution of $$  \mathrm{H}_{2} \mathrm{O}_{2}  $$ is 
  • $$17$$
  • $$15$$
  • $$34$$
  • $$85$$
The dihedral angle in gaseous $${ H }_{ 2 }{ O }_{ 2 }$$ is
  • $${ 180 }^{ 0 }$$
  • $${ 90 }^{ 0 }$$
  • $$111.{ 5 }^{ 0 }$$
  • $${ 109 }^{ 0 }{ 28 }^{ ' }$$
Which of the following represents the formula of water gas?
  • $$CO+{ H }_{ 2 }$$
  • $$CO+{ N }_{ 2 }$$
  • $$CO+{ H }_{ 2 }O$$
  • $$CO_{ 2 }+{ H }_{ 2 }$$
Volume strength of hydrogen peroxide is $$  22.4V$$. What volume of this sample is required for the oxidation of 3.4 g of hydrogen sulphide?
  • 50 ml
  • 200 ml
  • 100 ml
  • 5 ml
Which of the following is not correct regarding electrolytic preparation of $$ H_2O_2 $$ ?
  • 50 % concentrated $$ H_2SO_4 $$ is used
  • $$ S_2O^{2-}_8 $$ ion is deposited at anode
  • Dilute $$ H_2SO_4 $$ is used
  • Sulphuric acid undergoes oxidation
The dipole moment of $${ H }_{ 2 }{ O }_{ 2 }$$ is 2.1D. This indicates that the structure of $${ H }_{ 2 }{ O }_{ 2 }$$ is:
  • Linear
  • Non-linear
  • Symmetrical
  • none of these
Statement (I): Position of Hydrogen is still uncertain in the modern periodic table.
Statement (II): The Long form of the periodic table reflects the exact distribution of electrons among all the orbitals of an atom.
  • A statement I is correct, II is incorrect.
  • Statement II is correct, I is incorrect.
  • Both statements I and II are correct.
  • Both statements I and II are incorrect.
Hydride which has polymeric structure :
  • $$CaH_2$$
  • $$NaH$$
  • $$B_2H_6$$
  • $$BeH_2$$
Which is accepted structure of $$\mathrm { H } _ { 2 } \mathrm { O } _ { 2 }$$ in gas phase?
  • Both (A) and (B)
  • None of these
The correct statements among (a) to (d) are:
(a) saline hydrides produce $$H_{2}$$ gas when reacted with $$H_{2}O$$.
(b) Reaction of $$LiAlH_{4}$$ with $$BF_{3}$$ leads to $$B_{2}H_{6}$$.
(c) $$PH_{3}$$ and $$CH_{4}$$ are electron - rich and electron - precise hydrides, respectively.
(d) $$HF$$ and $$CH_{4}$$ are called as molecular hydrides.
  • (c) and (d) only
  • (a), (b) and (c) only
  • (a), (b), (c) and (d)
  • (a), (c) and (d) only
In water-gas shift reaction, hydrogen gas is produced from the reaction of steam with: 
  • methane
  • coke
  • carbon monoxide
  • carbon dioxide
The hydride ion $$ H^{-} $$ is a stronger base than its hydroxide ion $$OH^{-} $$ . Which of the following reactions will occur if sodium hydride ($$NaH$$) is dissolved in water
  • $$ H^{-}(aq)+H_{2}O\rightarrow H_{3}O^{-}(aq) $$
  • $$ H^{-}(aq)+H_{2}O(l)\rightarrow OH^{-}(aq)+H_{2}(g) $$
  • $$ H^{-}(aq)+H_{2}O(l)\rightarrow $$ No reaction 
  • None of these
A cell contains two hydrogen electrodes. The negative electrode is in contact with a solution of $$10^{-6}$$ M hydrogen ions. The EMF of the cell is 0.118 V at $$25^{\circ}C$$. The concentration of hydrogen ions at the positive electrode is
  • $$10^{-6}M$$
  • $$10^{-3}M$$
  • $$10^{-4}M$$
  • $$10^{-5}M$$
A solution of $$H_{2} O_{2}$$ is titrated with a solution of $$KMnO_{4}.$$ The reaction is
$$ 2MnO_{4}-+5H_{2}O_{2}+6H^{+}$$
$$ \rightarrow 2Mn^{2+}+5O_{2}+8H_{2}O$$
It requires $$50$$ ml of $$0.1$$ $$ M - KMnO_{4} $$ to oxidize $$10$$ ml of $$ H_{2}O_{2}.$$ The strength of $$ H_{2}O_{2} $$ solution is
  • $$4.25 (w/v)$$%
  • $$8.5 (w/v)$$%
  • $$0.85 (w/v)$$%
  • $$1.7 (w/v)$$%
Hydrogen can be prepared by mixing steam and water gas at $$673 K$$ in the presence of $$Fe_2O_3$$ and $$Cr_2O_3$$. This process is called: 
  • Nelson's process
  • Bosch's process
  • Serpeck's process
  • Parke's process
Which of the following compound are the soluble in water?
  • $$ CaC_{2}O_{4} $$
  • $$ SrSO_{4} $$
  • $$ BaCl_{2} $$
  • $$ (NH_{4})_{2}C_{2}O_{4} $$
Which of the following statement is correct for ionic hydrides?
  • The ionic hydrides are crystalline
  • The ionic hydrides are non-volatile
  • The ionic hydrides are non-conducting in solid state
  • All the correct
Which of the following properties of water leads in comparison to $$H_2S$$ and $$H_2Se$$ due to H-bonding? 
  • Low freezing point
  • Low boiling point
  • Low heat of vaporization
  • High heat of fusion
$$H_2O_2$$ is manufactured these days...
  • By the action of $$H_2SO_4$$ on $$Na_2O_2$$
  • By the action of $$H_2O_2$$ on $$BaO_2$$
  • By electrolysis of $$50\%\ H_2SO_4$$
  • By burning hydrogen in excess of oxygen
A good quality of water will have 
A) high DO
B) high BOD
C) high COD
  • A
  • B & C
  • C & A
  • A, B, C
 High purity $$(>99.95\%)$$ dihydrogen is obtained by: 
  • Electrolysis of acidified water using platinum electrodes
  • Electrolyzing warm aqueous barium hydroxide solution between nickel electrodes
  • Electrolysis of brine solution
  • Reaction of steam on hydrocarbons or coke at high temperature in the presence of catalyst
 $$H_2$$ gas is usually prepared by the reaction of 
  • $$Zn+dil.HCl$$
  • $$Zn+dil.H_2SO_4$$
  • $$Zn+NaOH$$
  • All of these
Which of the following statements is correct? 
  • Metallic hydrides are deficient of hydrogen
  • Metallic- hydrides conduct heat and electricity
  • Ionic hydrides do not conduct electricity in solid state
  • Ionic hydrides arc very good conductors of electricity in solid state
Which represent only amphiprotic species ?
  • $${ H }_{ 3 }^{ + }O,{ H }PO_{ 4 }^{ 2- },{ H }CO_{ 3 }^{ - }$$
  • $$H_2O,{ HPO }_{ 3 }^{ 2- },{ H_{ 2 }PO }_{ 2 }^{ - }$$
  • $${ HSO }_{ 4 }^{ - },{ H }_{ 2 }{ PO }_{ 4 }^{ - },{ H }_{ 2 }{ PO }_{ 3 }^{ - }$$
  • All of these
Pair of amphiprotic species is :
  • $$H_2CO_3$$ and $${ HCO }_{ 3 }^{ - }$$
  • $$H_2CO_3$$ and $$H_2O$$
  • $${ CO }_{ 3 }^{ 2- }$$ and $$H_3O^+$$
  • $${ HCO }_{ 3 }^{ - }$$ and $$H_2O$$
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:
  • $$P_{2}O_{5}$$
  • $$SiO_{2}$$
  • $$H_{2}O$$
  • $$CO_{2}$$
Which of the following is a true structure of $$H_2O_2$$?
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
  • $$I$$ and $$II$$
  • $$III$$ and $$IV$$
  • $$II$$ only
  • $$I$$ and $$III$$
Which one of the following pairs of substances on reaction will not evolve $$H_2$$ gas?
  • Iron and dil $$H_2SO_4$$
  • Iron and steam
  • Copper and $$HCl(g)$$
  • Sodium and ethyl alcohol
Water is a :
  • protophobic solvent
  • protophilic solvent
  • amphiprotic solvent
  • aprotic solvent
When electric current is supplied through an ionic hydride of fused state, then: 
  • Hydrogen is obtained at anode
  • Hydrogen is obtained at cathode
  • No change
  • Hydride ion moves towards cathode
  • Hydride ion present in solution
Which of the following statements do not define the characteristic property of water "Water is a universal solvent".
  • It can be dissolve maximum number of compounds
  • It has very low dielectric constant
  • It has high liquid range
  • None of these
$$H_2O_2$$ is obtained when dilute $$H_2SO_4$$ reacts with:
  • $$BaO_2$$
  • $$MnO_2$$
  • $$PbO_2$$
  • $$Na_2O_2$$
What is true about ice?
  • Its density is more than water
  • It is a good conductor of heat
  • It is a thermal insulator
  • Its density is less than water
Hydrogen can be obtained from water, by the action of water on 
  • Calcium carbide
  • Calcium hydride
  • Calcium oxide
  • Calcium
In lab $$ H_{2}O_{2} $$ is prepared by 
  • Cold $$ H_{2}SO_{4}+BaO_{2} $$
  • $$ HCl+BaO_{2} $$
  • Conc.$$ H_{2}SO_{4}+Na_{2}O_{2} $$
  • $$ H_{2}+O_{2} $$
Plumbosolvency is a health hazard in the transportation of 
  • Hard water only
  • Soft water only
  • Both (A) and (B)
  • Water containing plum juice
Lead pipes are not used for carrying drinking water because
  • They are covered with a coating of lead carbonate
  • They are corroded by air and moisture
  • Water containing dissolved air attacks lead forming soluble hydroxide
  • None of these
$$ H_{2}O_{2} $$ is manufactured these days
  • By the action of $$ H_{2}O_{2} $$ and $$ BaO_{2} $$
  • By the action of $$ H_{2}SO_{4} $$ on $$ Na_{2}O_{2} $$
  • By electrolysis of 50% $$ H_{2}SO_{4} $$
  • By burning hydrogen in excess of oxygen
Saline hydrides react explosively with water, such fires can be extinguished by
  • Water
  • Carbon dioxide
  • Sand
  • None of these
HCl is added to following oxides. Which one would give $$ H_{2}O_{2} $$? 
  • $$ MnO_{2} $$
  • $$ PbO_{2} $$
  • $$ BaO $$
  • None of these
Which of the following pair will not produce dihydrogen gas?
  • $$Cu+HCl \text{(dil)}$$
  • $$ Fe+H_{2}SO_{4} $$
  • $$Mg\ +$$ steam
  • $$Na\ +$$ alcohol
Hydrogen can be produced by heating
  • Cu with $$ H_{2}SO_{4} $$
  • Sodium formate
  • Sodium oxalate
  • None of these
which if the following statements is correct?
  • Metallic hydrides are deficient of hydrogen.
  • Metallic hydrides conduct heat and electricity.
  • Ionic hydrides do not conduct electricity in solid state.
  • Ionic hydrides are very good conductors of electricity in solid state.
The oxide that gives H$$_2$$O$$_2$$ on treatment with dilute H$$_2$$SO$$_4$$ is -
  • PbO$$_2$$
  • BaO$$_2$$.8H$$_2$$O $$+$$ O$$_2$$
  • MnO$$_2$$
  • TiO$$_2$$
Fill in the blanks:
Every nine parts of water by weight contains eight parts by weight of ______.
  • oxygen
  • helium
  • carbonic
  • sulphur dioxide gas
Which of the following melts in boiling water ?
  • Gun metal
  • Wood's metal
  • Monel metal
  • Bell metal
  • None of these
Which of the following is not true about $$H_{2} O$$ molecule?
  • The molecule has $$\mu= 0.$$
  • The molecule can act as a base.
  • Shows abnormally high boiling point in comparison to the hydrides of other elements of the oxygen group.
  • The molecule has a bent shape.
In ice, the length of H-bonds :
  • is less than that of covalent bonds
  • is greater than that of covalent bonds
  • is same as that of covalent bonds
  • can be less greater or same as that of covalent bonds
Which of the following hydrides is least stable to hydrolysis ?
  • $$CH_{4}$$
  • $$SiH_{4}$$
  • $$SnH_{4}$$
  • $$PbH_{4}$$
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