CBSE Questions for Class 11 Medical Chemistry Hydrogen Quiz 8 - MCQExams.com

On moving from left to right in a period what is the order of acidic character of hydrides?
  • $$NH_{3} < H_{2}O < HF$$
  • $$HF < H_{2}O < NH_{3}$$
  • $$H_{2}O < HF < NH_{3} $$
  • $$H_{2}O < NH_{3} < HF$$
Carbon hydrides of the type, $$C_{n}H_{2n+2}$$ do not act as Lewis acid or Lewis base.They behave as normal carbon hydrides because:
  • carbon hydrides are electron-rich hydrides
  • carbon hydrides are electron-deficient hydrides
  • carbon hydrides are electron-precise hydrides
  • carbon hydrides are non-stoichiometric hydrides.
Which of the following hydrides is electron deficient?
  • $$NaH$$
  • $$CaH_{2}$$
  • $$CH_{4}$$
  • $$B_{2}H_{6}$$
What is the trend of boiling points of hydrides of N, O, and F?
  • Due to lower molecular masses $$NH_{3}, H_{2}O$$ and HF have lower boiling points than those of the subsequent group member hydrides
  • Due to higher electronegativity of N, O and F; $$NH_{3}, H_{2}O$$ and HF show hydrogen bonding and hence higher boiling points than the hydrides of their subsequent group members.
  • There is no regular trend in the boiling points of hydrides
  • Due to higher oxidation states of N, O and F, the boiling points of $$NH_{3}, H_{2}O$$ and HF are higher than the hydrides of their subsequent group members.
In complex hydrides, hydride ions act as ligand and are coordinated to metal ions. These hydrides are good reducing agents. Which of the following hydrides is not a complex hydride?
  • $$LiAIH_{4}$$
  • $$NaBH_{4}$$
  • $$(AlH_{3})_{n}$$
  • $$LiBH_{4}$$
In what respect is the electronic configuration of hydrogen and halogens similar?
  • Hydrogen and halogens have one electron in their outermost shell
  • Hydrogen and halogens have one electron less than noble gas configuration
  • Hydrogen and halogens can lose one electron
  • Hydrogen and halogens show noble gas configuration
From group 6 only one metal forms hydride. This metal is:
  • Mo
  • W
  • Cr
  • Co
Peroxodisulphate on hydrolysis yields:
  • water
  • dihydrogen
  • hydrogen peroxide
  • deuterium
Non-stoichiometric hydrides are produced by:
  • palladium, vanadium
  • manganese, lithium
  • nitrogen, fluorine
  • carbon, nickel
The maximum number of hydrogen bonds formed by a water molecule in ice is:
  • $$4$$
  • $$1$$
  • $$2$$
  • $$3$$
Which of the statements given below are true for the structure of water molecule?
(i) Oxygen undergoes $$sp^{3}$$ hybridization.
(ii) Due to the presence of two lone pairs of electrons on oxygen, the $$H-O-H$$ bond angle is $$118.4^{0}$$ 
(iii) Due to angular geometry the net dipole moment of water is not zero, u = 1.84 D. 
  • (i) and (ii)
  • (ii) and (iii)
  • (i) and (iii)
  • only (ii)
Liquid water is denser than ice due to:
  • higher surface tension
  • hydrogen bonding
  • van der Waals forces
  • covalent bonding
Which is not a property of water ?
  • It is a colorless 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.
When $$CO_2$$ is bubbled through a solution of barium peroxide in water:
  • carbonic acid is formed
  • $$H_2O_2$$ is formed
  • $$H_2O$$ is formed
  • barium hydroxide is formed
During hydrate formation from aqueous solution water can be associated in different forms. Indicate the wrong combination. 
Coordinated water -$$[Cr(H_{2}O)_{6}]^{3+}3Cl^{-}$$
Interstitial water - $$BaCl_{2}.2H_{2}O$$
Hydrogen bonded water --$$[Cu(H_{2}O)_{4}]^{2+}SO_{4}^{2-}.H_{2}O$$
  • (i)
  • (ii)
  • (iii)
  • none of these
Which of the following properties of water is related to the hydrogen bonding? 
  • High boiling point
  • High heat of vaporizatiom
  • Low density of ice compared to water
  • None of these
When a substance reacts with water and breaks into acids and bases the process is called:
  • dialysis
  • solvolysis
  • hydrolysis
  • dissolution
Elements of which of the following group (s) of periodic table do not form hydrides?
  • Groups 7, 8, 9
  • Group 13
  • Groups 15, 16, 17
  • Group 14
Which of the following hydrides is electron-precise hydride?
  • $$B_2H_6$$
  • $$NH_3$$
  • $$H_2O$$
  • $$CH_4$$
Hydrogen resembles halogens in many respects for which several factors are responsible. Of the following factors which one is the most important in this respect?
  • Its tendency to lose an electron to form a cation
  • It tendency to gain a single electron in its valence shell to attain stable electronic configuration
  • Its low negative electron gain enthalpy value
  • Its small size
The oxidising property of $$H_2O_2$$ is best explained by assuming that two oxygen atoms in its molecule are_______
  • bonded differently.
  • bonded similarly
  • bonded covalently
  • bonded by hydrogen bonds
Name the phenomenon used in dissolution of water.
  • solubility
  • crystallization
  • polarization
  • surface tension
Calculate the ebullioscopic for water. The heat of vapourisation is $$40.685 \ kJ\ mol^{-1}$$.
  • $$0.512\ K\ kg\ mol^{-1}$$
  • $$1.86\ K\ kg\ mol^{-1}$$
  • $$5.12\ K\ kg\ mol^{-1}$$
  • $$3.56\ K\ kg\ mol^{-1}$$
Out of the following metals which will give $$H_2$$ reaction with $$NaOH$$?
$$I: Zn$$
$$II: Mg$$
$$III: Al$$
$$IV: Be$$
  • $$I, II, III, IV$$
  • $$I, III, IV$$
  • $$II, IV$$
  • $$I, III$$
Which of the hydrated species can exist?
I. $$H_5O^+_2$$
II. $$H_3O^+$$
III. $$H_3O^-_2$$
IV. $$H_7O^+_3$$
Select alternate from.
  • II only
  • I and II
  • I, II and IV
  • I, II, III and IV
Industrial hydrogen is manufactured by passing an electric current through a solution of?
  • Alumina
  • Sodium hydroxide
  • Carbon dioxide
  • Magnesium hydroxide
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 hydrogen oxygen group
  • The molecule has a bent shape
The sources of dissolved oxygen in water is ________.
  • photosynthesis
  • natural aeration
  • mechanical aeration
  • all of the above
Hydrogen exists in atomic state in which of the following compounds?
  • Metallic hydrides
  • Ionic Hydride
  • Molecular hydrides
  • $${ H }_{ 2 }O$$
Which of the following cannot be oxidized by $$H_2O_2$$?
  • $$KI + HCl$$
  • $$O_3$$
  • $$PbS$$
  • $$Na_2SO_3$$
$$H_2$$ gas can not be prepared by :
  • $$Be$$ $$+$$ $$NaOH$$
  • $$Na$$ $$+$$ $$NaOH$$
  • $$Mg$$ $$+$$ $$NaOH$$
  • both A and B
Which combination do not produce $${ H }_{ 2 }$$ except:-
  • Au + cold water
  • Cu + aq.$${ H }_{ 2 }{ SO }_{ 4 }$$
  • Pt + $$dil.{ HNO }_{ 3 }$$
  • All of these
Which of the following has maximum purity
  • River water
  • Distilled water
  • Rain water
  • none
Very pure hydrogen $$(99.9\%)$$ can be made by which of the following processes?
  • Mixing natural hydrocarbons of high molecular weight
  • Electrolysis of water
  • Reaction of salt like hydrides with water
  • Reaction of methane with steam.
The physical state of water is liquid at which of the following temperatures?
  • $$25^o C$$
  • $$0^oC$$
  • $$100^oc$$
  • none of these
Very pure hydrogen (99.9%) can be made by 'which of the following processes?
  • Reaction of methane with steam
  • Mixing natural hydrocarbons of high molecular weight
  • Elecrolysis of water
  • Reaction of salt like hydrides with water
Which of the following compound will evolve $$H_{2}$$ gas when reacts with alkali metals?
  • $$H_{2}C =CH_{2}$$
  • $$R-O-R$$
  • $$R-CH_{3}$$
  • $$R-OH$$
At what temperature, water have maximum density?
  • $$0^oC$$
  • $$4^oC$$
  • $$30^oC$$
  • $$25^oC$$
Which of the following reaction will not produce hydrogen gas?
  • Reaction between $$Fe$$ and dil. $$HCl$$
  • Reaction between $$Zn$$ and conc. $$ H_{2}SO_{4} $$
  • Reaction between $$Zn$$ and $$NaOH$$
  • Electrolysis of $$NaCl$$ in Nelson's cell
$${ H_{ 2 }O }_{ 2 }$$ is:
  • oxidising agent
  • both oxidising and reducing agent
  • reducing agent
  • none of the above
Hydrogen peroxide is now generally prepared to industrial scale by the:
  • action of $$H_{2}SO_{4}$$ on barium peroxide
  • action of $$H_{2}SO_{4}$$ on sodium peroxide
  • electrolysis of $$50$$% $$H_2SO_4$$
  • burning hydrogen in excess of oxygen
Water released from dams is measured in?
  • Feet per second or CFS
  • Liters
  • Cusesc
  • Feet
The following factor are responsible for this property of water:
  • Water molecule is polar in nature.
  • Water molecule can form hydrogen bonds with the molecules of other compounds.
  • water molecules can enter in a chemical reaction with molecules of other compounds.
  • Water has a high value of dielectric constant.
On an industrial scale $${ H }_{ 2 }{ O }_{ 2 }$$ is prepared by auto oxidation of ______.
  • 2- ethylanthraquinol
  • 2-ethylanthraquinone
  • 1- ethylanthraquinol
  • 1- ethylanthraquinone
Hydrogen oxidised is reduced by 
  • $$H_2O$$
  • Acidic solution of $$KMnO_{4}$$
  • Berium oxide
  • None of the above
Hydrogen peroxide is obtained by the electrolysis of _________
  • water
  • sulpharic acid
  • hydrochoric acid
  • fused sodium
Intramolecular H-bonding is present in:
  • $$O-nitrophenol$$
  • $$HCl$$
  • $$HBr$$
  • $$HF$$
The structure of $$H_2O_2$$ is :
  • Half open book like
  • Linear
  • Closed book
  • Pyramidal
The amount of water recommended by united nations for drinking, washing, cooking and maintaning, proper hygiene is a minimum__________ (i) litre per person/day. This amount is about _____(ii) bucket of water Per Person/day. The upper limit of layer, where all the space between particle of soil and gaps between rocks are filled with water is called ______  (iii) and and it can be recharge by  _____(v)._________(vi) is a technique of watering plants by making use of narrow deliver water directly A the base of plants.
  • (i) 60 litre, (iii) water cycle, (v) Bawaris
  • (i) Two and half (iii) water table (vi) drip irrigation
  • (i) 50 litre, (ii) two, (v) seeping
  • (iii) Water cycle (v) infiltration (vi) ground water
Correct order of ionic character is:
  • $$CaH_2 < BaH_2 < CH_4$$
  • $$CH_4 < CaH_2 < BaH_2$$
  • $$CH_4 < BaH_2 < CaH_2$$
  • $$BaH_2< CaH_2 < CH_4$$
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