CBSE Questions for Class 11 Medical Chemistry Hydrogen Quiz 10 - MCQExams.com

Hydrogen resembles in many of its properties with
  • halogens
  • alkali metals
  • both (A) and (B)
  • None of these
Protonic acid is
  • an compound that form solvated hydrogen ion in polar solvent
  • an acid which accepts the proton
  • a compound that forms hydride ion in polar solvent
  • an acid which donates the proton
Triple point of water is 
  • 273 K
  • 373 K
  • 203 k
  • 193 K
Maximum number of hydrogen bonding in a $$ H_{2}O $$ molecule is 
  • 1
  • 2
  • 3
  • 4
Systematic name of $$ H_{2}O $$ (oxide of hydrogen) is
  • Water
  • Hydrogen oxide
  • Oxidane
  • None of these
What is the Boiling point of water and which states of $$H_2O$$ exist at the boiling temperature of the water?
  • 100 K, liquid and gas
  • $$100^{\circ} C$$, liquid and solid
  • $$100^{\circ} C$$, liquid and gas
  • 100 K, liquid and solid
Ionic hydrides are usually
  • Good electrically conductors when solid
  • Easily reduced
  • Good reducing agents
  • Liquid at room temperature
The structure of $$ H_{2}O_{2} $$ is
  • planar
  • linear
  • spherical
  • non-planar
The boiling point of water is exceptionally high because
  • There is covalent bond between H and O
  • Water molecule is linear
  • Water molecules associate due to hydrogen bonding
  • Water molecule is not linear
Lead pipes are not suitable for drinking water because
  • A layer of lead dioxide is deposited over pipes
  • Lead reacts with air to form litharge
  • Lead reacts will water containing air to form $$Pb(OH)_{2}$$
  • Lead forms basic lead carbonate
The oxide that gives hydrogen peroxide $$\left (  H_{2}O_{2}  \right ) $$ on the treatment with a dilute acid $$ H_{2}SO_{4} $$
  • $$ MnO_{2} $$
  • $$ PbO_{2} $$
  • $$ Na_{2}O_{2} $$
  • $$ TiO_{2} $$
The property of hydrogen which distinguishes it from alkali metals is
  • Its electropositive character
  • Its affinity for non metal
  • Its reducing character
  • Its non-metallic character
Hydrogen can behave as a metal
  • At very high temperature
  • At very low temperature
  • At very high pressure
  • At very low pressure
Hydrogen has a tendency to gain one electron to acquire helium configuration. In this respect it resembles
  • Halogens
  • Actinides
  • Transition elements
  • Alkali metals
The amount of $$ H_{2}O_{2} $$ present in 1 L of 1.5 $$ NH_{2}O_{2} $$ solution is 
  • 2.5 g
  • 25.5 g
  • 3.0 g
  • 8.0 g
Metals of groups 7, 8 and 9 do not from metallic hydrides. This is termed as
  • hydride gap
  • hydride shift
  • anhydride
  • dehydride
Reaction between the following pairs will produce $$ H_2 $$ except
  • Na + ethyl alcohol
  • Fe + steam
  • $$ Fe +H_2SO_4 (aq) $$
  • $$ Cu +HCl (aq) $$
Which of the following statements is correct?
  • Elements of group 15 form electron deficient hydrides.
  • All elements of group 14 form electron precise hydrides.
  • Electron precise hydrides have tetrahedral geometries.
  • Electron rich hydrides can act as Lewis acids.
The correct electron dot structure of a water molecule is 
Only one element of $$----$$ forms hydride.
  • group 6
  • group 7
  • group 8
  • group 9
Elements which show unique nature in the preparation of hydrogen are
  • $$Na, \ K, \ Li$$
  • $$Mg, \ Ca, \ Ba$$
  • $$Fe, \ Cu, \ Ag$$
  • $$Al,\ Zn,\ Pb$$
When ice melts to form liquid water at $$0^0C$$, there is a contraction in volume. This is due to :
  • the molecules contracting in size
  • a partial disruption of the hydrogen bonded network of ice on melting
  • the absorption of heat during the melting process
  • the dissolving of air into the water during the melting process
What is not true about ice?
  • It has open cage like structure
  • It has less density than water
  • Each O atom is surrounded by 4 H atoms
  • Each O atom has four H-bonds around it
Identify X in the reaction: $$X + \underset{(steam)}{2H_{2}O} \overset{\Delta}{\longrightarrow} XO_{2} + 2H_{2}$$
  • $$C$$
  • $$Si$$
  • $$Ge$$
  • $$Sn$$
Strength of $$10$$ volume hydrogen peroxide solution means
  • $$30.35\ g\ L^{-1}$$
  • $$17\ g\ L^{-1}$$
  • $$34\ g\ L^{-1}$$
  • $$68\ g\ L^{-1}$$
Which is not a property of water? 
  • It is a colourless and tasteless liquid.
  • There is no hydrogen bonding in solid state of water.
  • It is an excellent solvent for transportation of ions in plants and animals.
  • Frozen water is lighter than liquid water.
Heavy water $$(D_2O)$$ freezes at
  • $$-3.8^o\ C$$
  • $$3.8^o\ C$$
  • $$0^o\ C$$
  • $$38^o\ C$$
Water contains 88.89% of A by weight is decomposed into its elements B and oxygen. Pure C is a poor conductor of electricity and hence it is acidified using dilute sulphuric acid. When electric current is passed through acidulated water, using platinum electrones, hydrogen gas is evolved at cathode and oxygen gas is evolved at D.

What is D?
  • Anode
  • Cathode
  • Electrolyte
  • Catalyst
Pure hydrogen is obtained by carrying electrolysis of 
  • Water containing $$ H_{2}SO_{4} $$
  • Water containing $$NaOH$$
  • $$ Ba\left ( OH \right )_{2} $$ solution
  • $$KOH$$ solution
Limiting compositions of f-block hydrides are
  • $$ MH_{2} $$ and $$ MH_{3} $$
  • $$ MH_{3} $$ and $$ MH_{5} $$
  • $$ MH_{2} $$ and $$ MH_{8} $$
  • $$ MH_{2} $$ and $$ MH_{6} $$
Water contains 88.89% of A by weight is decomposed into its elements B and oxygen. Pure C is a poor conductor of electricity and hence it is acidified using dilute sulphuric acid. When an electric current is passed through acidulated water, using platinum electrons, hydrogen gas is evolved at cathode and oxygen gas is evolved at D.

What is A?
  • Hydrogen
  • Oxygen
  • Water
  • Sulphuric acid
Saline hydrides:
  • are dehydrating agents
  • are formed by transition metals
  • are very poor reducing agents
  • are stable towards water and alcohol
Which is true statement about $$H_{2}O$$?
  • Hardness can be removed by passing through ion exchange resin
  • Its pressure can be detected by anhydrous $$CuSO_{4}$$
  • It is amphoprotic
  • All of the above
Water contains 88.89% of A by weight is decomposed into its elements B and oxygen. Pure C is a poor conductor of electricity and hence it is acidified using dilute sulphuric acid. When electric current is passed through acidulated water, using platinum electrones, hydrogen gas is evolved at cathode and oxygen gas is evolved at D.

What is 'B'?
  • Oxygen
  • Hydrogen
  • Water
  • Sulphuric acid
Which of the following statement(s) is/are correct about the water-gas shift reaction which is used in the commercial preparation of hydrogen gas?
  • It involves the selective oxidation of $$CO$$ of water gas to $$CO_{2}$$ with the help of steam in the presence of iron chromate as catalyst
  • It involves the separation of $$CO$$ and $$H_{2}$$ by solvent extraction method
  • It involves the absorption of $$CO$$ in aqueous copper $$(I)$$ chloride solution
  • It involves the removal of $$H_{2}$$ through occlusion with $$Pd$$
Half litre each of three samples of $$H_{2}O_{2}$$ labelled $$10$$ volume, $$15$$ volume and $$20$$ volume are mixed and then diluted with equal volume of water. The relative strength of resultant $$H_{2}O_{2}$$ solution is:
  • $$2.5$$
  • $$5.0$$
  • $$7.5$$
  • $$10$$
If $$10$$ ml of $$H_2O_2$$ solution requires $$25$$ ml of $$\dfrac{\text{N}}{20}\: KMnO_{4}$$ for complete oxidation in acidic medium, then the mass (in g) of available $$O_{2}$$ per litre present in the solution is:
  • $$1$$
  • $$2$$
  • $$3$$
  • $$4$$
$$25$$ ml of $$H_{2}O_{2}$$ solution were added to excess of acidified $$KI$$ solution. The iodine so liberated required $$20$$ ml of $$0.1\: \text{N}$$ $$Na_{2}S_{2}O_{3}$$ for titration. Calculate strength of $$H_2O_2$$ in terms of normality and percentage?
  • $$0.04\:\text{N}, 0.136\%$$
  • $$0.08\:\text{N}, 0.136\%$$
  • $$0.04\:\text{N}, 0.163\%$$
  • $$0.02\:\text{N}, 0.163\%$$
Peroxoborate in aqueous solution provides:
  • $$[B(OH)_4]^-+H_2O_2$$
  • $$Na_2B_4O_8\cdot 10H_2O$$
  • $$HBO_2$$
  • $$Na[B_3O_3(OH)_4]$$
An experimental set up is shown in the figure. Identify the metal X and gas Y respectively in the figure.
315317.png
  • Zinc, $$\displaystyle H_{2}$$ gas
  • Copper, $$\displaystyle CO_{2}$$ gas
  • Silver, $$\displaystyle CO_{2}$$ gas
  • Platinum, $$\displaystyle H_{2}$$ gas
By which process $$H_{2}O_{2}$$ does not form?
  • By $$(A)$$ and $$(C)$$ process
A teacher one day pointed out to his students the peculiar fact that water is a unique liquid that freezes exactly at $$0^oC$$ and boils exactly at $$100^oC$$. He asked the students to find the correct statement based on this fact.

Which of the statements is true regarding the above fact?
  • Water dissolves anything however sparingly the dissolution may be.
  • Water is a polar molecule.
  • Boiling and freezing temperatures of water were used to define a temperature scale.
  • Liquid water is denser than ice.

When a substance A reacts with water, it produces a combustible gas B and a solution of substance C in water. D reacts with this solution of C and produces the same gas B on warming. D can also produce gas B on reaction with dilute $$ \displaystyle H_{2}SO_{4}$$. A imparts a deep golden yellow colour to smokeless flame. A, B, C and D respectively are:
  • $$Na \displaystyle, H_{2}, NaOH, Zn$$
  • $$K,  \displaystyle H_{2}, KOH, Al$$
  • $$Ca,  \displaystyle H_{2}, \displaystyle Ca\left ( OH \right )_{2}, Sn$$
  • $$CaC_{2},\displaystyle C_{2}H_{2},\displaystyle Ca\left ( OH \right )_{2}, Fe$$
Which of the following produces hydrolith with dihydrogen?
  • Mg
  • Al
  • Cu
  • Ca
$$\displaystyle { H }_{ 2 }O$$ has a higher boiling point than HF. Which among the following is the right reason ?
  • $$\displaystyle { H }_{ 2 }O$$ is more polar than HF
  • $$\displaystyle { H }_{ 2 }O$$ can form more hydrogen bonds
  • $$\displaystyle { H }_{ 2 }O$$ has a higher molecular weight
  • $$\displaystyle { H }_{ 2 }O$$ has more atoms
  • $$\displaystyle { H }_{ 2 }O$$ does not have a higher boiling point than HF
What is the condensation point of water?
  • 0 degrees Celsius
  • 0 degrees Fahrenheit
  • 100 degrees Fahrenheit
  • 212 degrees Fahrenheit
Boiling water reacts with _____________ gives their respective hydroxides and ammonia gas.
  • magnesium nitride
  • calcium nitride
  • aluminium nitride
  • all of the above
Boiling water reacts with $$C_6H_5N^+_2Cl^-$$ to give
  • Aniline
  • Benzylamine
  • Phenol
  • Benzaldehyde
What is the volume of "20 volume $$H_2O_2$$" required to get $$5000\  cm^3$$ of oxygen at S.T.P? 
  • $$250\ cm^3$$
  • $$50\ cm^3$$
  • $$100\ cm^3$$
  • $$125\ cm^3$$
Choose the correct statement about the industrial preparation of hydrogen from water gas $$(CO+H_2)$$.
  • $$H_2$$ is removed through occlussion with $$Pd$$
  • $$CO$$ and $$H_2$$ are fractionally separated using differences in their densities
  • $$CO$$ is removed by absorption in $$ aq. Cu_2Cl_2$$ solution
  • $$CO$$ is oxidised to $$CO_2$$ with steam in the presence of a catalyst followed by absorption of $$CO_2$$ in alkali
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