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WorksheetsHYDROGEN CLASS 11 (FOR JEE)
Total questions: 91
Worksheet time: 52mins
Hydrogen has _(a)_ Protons and _(b)_ Electrons
(a) 2 ; (b) 3
(a) 1 ; (b) 1
(a) 3 ; (b) 0
(a) 0 ; (b) 1
Hydrogen in elemental form exist as
Triatomic
Diatomic
Monoatomic
H
Hydrogen has resemblance with Alkali Metals as
It loses one electron
It forms Halides, Sulphide and Oxides
It has high Ionisation Energy
It doesn't posess metallic character
Hydrogen resembles with Halogens as
It has high Ionisation Enthalpy
It forms a diatomic molecule
It combines with elements to form hydrides and large number of covalent compounds
It has a very low reactivity
Why is Hydrogen available in less quantity in Earth's Atmosphere?
Due to its light nature
Because it is already present in Jupiter and Saturn
Due to heavy nature of Dueterium
Because Tritium is Radioactive
Hydrogen has how many isotopes
3
2
1
4
How many Neutrons does Protium has?
0
2
1
3
Deuterium has how many Neutrons?
1
3
0
4
What is Deutrium also called
Heavy Hydrogen
Light Hydrogen
Breathable Hydrogen
Hydrogen Particulate
How many Neutrons does Tritium has?
2
1
0
4
Which scientist got a Nobel Proze for separating Hydrogen isotope of Mass Number 2
Harold C. Urey
Hans Christian Orested
Harold D. Urey
Harold Wasteman Park
Which is predominant form among Hydrogen Isotopes?
Protium
Deuterium
Tritium
One of these
Which isotope of Hydrogen is radioactive?
Tritium
Deuterium
Protium
All of the above
Which isotope of Hydrogen emits low energy β – particles
Tritium
Deuterium
Protium
None of the Above
Why do isotopes of Hydrogen have almost the same chemical properties?
Because they have the same electronic configuration.
Because they react with Chlorine
Because they do not react with Noble Gases
Because they are isotopes and isotopes do not react.
In physical properties, isotopes of Hydrogen differ considerably due to their _______
large mass differences
small mass differences
large reactivity differences
small mass
Laboratory Preparation of Dihydrogen is:
Di-hydrogen of high purity (>99.95%) is obtained through
Electrolysis of warm Barium Hydroxide Solution using Nickel Electrodes
Electrolysis of acidified water using Platinum Electrodes
Electrolysis of Brine Solution
The Reaction of Zinc with dilute HCl
Di Hydrogen is produced commercially by
It is obtained as a byproduct in the manufacture of sodium hydroxide and chlorine by the electrolysis of brine solution
Electrolysis of acidified water using platinum electrodes
The reaction of steam on hydrocarbons or coke at high temperatures in the presence of a catalyst
The reaction of granulated zinc with dilute hydrochloric acid
The mixture of CO and H2 is called
Water-gas
Syngas
Solid gas
Waste-gas
Water-gas is used for the synthesis of
methanol
number of Hydrocarbons
saw-dust
scrap wood
The process of producing 'syngas' from coal is called
coal gasification
coalification
coal syngas
syngasification
The production of dihydrogen can be increased by
reacting carbon monoxide of syngas mixtures with steam in the presence of Iron chromate as the catalyst.
reacting carbon monoxide of syngas mixtures with steam in the presence of Nickel chromate as the catalyst.
reacting carbon oxide of syngas mixtures with steam in the presence of Iron chromate as the catalyst.
reacting carbon monoxide of syngas mixtures with steam in the presence of Iron chromite as the catalyst.
This reaction is called
Water-Gas Shift Reaction
Water-Gas Side Reaction
Water-Gas Smite Reaction
Water-Gas Reaction with Steam
Carbon dioxide is removed by scrubbing with
sodium arsenite solution
sodium sulphate solution
sodium arsenic solution
sodium arsate solution
Physical Properties of Di-Hydrogen Gas
colourless
odourless
tasteless
combustible gas
lighter than air and insoluble in water.
The chemical behaviour of dihydrogen (and for that matter any molecule) is determined, to a large extent, by
bond dissociation enthalpy
bond association enthalpy
vaporisation enthalpy
bonding energy
The H–H bond dissociation enthalpy is the _______ for a single bond between two atoms of any element.
highest
lowest
middle
None
The atomic hydrogen is produced at a high temperature in an electric arc or under ultraviolet radiation. Why?
Because it is inert at room temperature due to high H-H bond enthalpy.
Because it is inert at room temperature due to low H-H bond enthalpy.
Because it is reactive at room temperature due to high H-H bond enthalpy.
Because it is reactive at room temperature due to very high H-H bond enthalpy.
Atomic Hydrogen accomplishes reactions by
loss of the only electron to give H+,
gain of an electron to form H–.
sharing electrons to form a single covalent bond.
sharing electrons to form a single ionic bond.
This is an example of
Reaction with halogens
Reaction with dioxygen
Reaction with dinitrogen
Reactions with organic compounds
When X is replaced by F then, what is special about it?
it can also occur in the dark
it requires iodine as a catalyst
it requires Chromium as a catalyst
it can also occur in high temperature
This is the method for the manufacture of ammonia by the
Haber process.
Lame's Process
Broche's Proces
Commode Process
This is an example of
Reactions with metals
Reactions with metal ions and metal oxides
Reactions with the organic compound
Reaction with dioxygen
This is an example of
Reactions with metal ions and metal oxides
Reactions with the organic compound
Reactions with metals
Reaction with dioxygen
Reactions with organic compounds: It reacts with many organic compounds in the presence of catalysts to give useful hydrogenated products of commercial importance. For example:
Hydrogenation of vegetable oils using nickel as catalyst gives edible fats (margarine and vanaspati ghee)
Hydroformylation of olefins yields aldehydes which further undergo reduction to give alcohols
hydrogenation of polyunsaturated vegetables
Hydrogenation of olefins yields ketones which further undergo reduction to give alcohols.
Which of the following is the correct use of Di-Hydrogen?
The synthesis of ammonia which is used in the manufacture of nitric acid and nitrogenous fertilizers.
The manufacture of vanaspati fat by the hydrogenation of polyunsaturated vegetable oils like soybean, cotton seeds etc.
The manufacture of bulk organic chemicals, particularly methanol.
In daily life, it is used as hair bleach and as a mild disinfectant. As an antiseptic, it is sold in the market as perhydrol.
It is used to manufacture chemicals like sodium perborate and percarbonate, which are used in high-quality detergents.
Which of the following is the correct use of Di-Hydrogen?
It is widely used for the manufacture of metal hydrides
In metallurgical processes, it is used to reduce heavy metal oxides to metals.
It is used for the preparation of hydrogen chloride, a highly useful chemical.
It is used as rocket fuel in space research.
It is employed in the industries as a bleaching agent for textiles, paper pulp, leather, oils, fats, etc.
What are the advantages of Di-Hydrogen?
It does not produce any pollution
It releases greater energy per unit mass of fuel
It is present everywhere, so there is no shortage
It is a great source of generating water
Dihydrogen, under certain reaction conditions, combines with almost all elements, except noble gases, to form binary compounds, called _______
hydrides
sulphides
bromides
halides
Which of the following is true about Ionic/Saline Hydrides
stoichiometric compounds
formed with most of the s-block elements
crystalline, non-volatile and nonconducting in solid-state
their melts conduct electricity
electrolysis liberate dihydrogen gas at anode
Lithium hydride is rather _______ at moderate temperatures with O2 or Cl2.
unreactive
hyper-reactive
normal reactive
None
Which of the following is true about Covalent/Molecular Hydride?
Dihydrogen forms molecular compounds with most of the p-block elements.
(i) electron-deficient, (ii) electron-precise, and (iii) electron-rich hydrides.
For convenience hydrogen compounds of nonmetals have also been considered as hydrides.
These are formed by many d-block and f-block elements.
These hydrides conduct heat and electricity though not as efficiently as their parent metals do.
Which of the following is true about Metallic or Non-stoichiometric (or Interstitial ) Hydrides.
These are formed by many d-block and f-block elements.
However, the metals of groups 7, 8 and 9 do not form hydride.
These hydrides conduct heat and electricity though not as efficiently as their parent metals do.
React violently with water producing dihydrogen gas.
For convenience hydrogen compounds of nonmetals have also been considered as hydrides.
Which of the following is true about the Physical properties of Water
colourless and tasteless liquid
high freezing point, high boiling point, high heat of vaporisation and high heat of fusion
higher specific heat, thermal conductivity, surface tension, dipole moment and dielectric constant
excellent solvent for the transportation of ions and molecules required for plant and animal metabolism
highly ordered three dimensional hydrogen-bonded structure
The unusual properties of water in the condensed phase (liquid and solid states) are due to the presence of extensive _______ between water molecules.
hydrogen bonding
bond dissociation enthalpy
less bond angle
more bond length
In the gas phase, water is a bent molecule with a bond angle of _______.
104.5°
102°
105.5°
106.5°
Is water a polar molecule?
[Answer in (Yes/No)]
(a)
Water at very low temperatures condenses to _______ form.
cubic
hexagonal
circular
heptagonal
In the Brönsted sense, water acts as an _______ with NH3 and a base with H2S.
acid
neutral
base
None
Auto-protolysis
Auto-prelysis
Autolytic
Auto-Cryptolysis
What is Hard Water?
Presence of calcium and magnesium salts in the form of hydrogen carbonate, chloride and sulphate in water
It does not give lather with soap
It does give lather with soap
Absence of calcium and magnesium salts in the form of hydrogen carbonate, chloride and sulphate in water
What is Soft Water?
Water free from soluble salts of calcium and magnesium
It gives lather with soap easily.
Water full from soluble salts of calcium and magnesium
It doesn't give lather with soap easily
I, II, III and IV
I and II
I, II and III
II only
Which of the following process is used for the manufacture of H2?
Lane’s process
Le-Blanc process
Hoope’s process
Carter’s process
Adsorbed hydrogen by Palladium is known as:
Occluded
Nascent
Atomic
Heavy
Which forces of attraction are responsible for the liquefication of H2?
Dispersion forces
Hydrogen bonding
Dipole force
Coulomb's Law
In which property listed below hydrogen does not resemble alkali metals?
Tendency to form cation
Nature of oxide
Combination with halogens
Reducing character
Hydrogen can be prepared by the action of dil. H2SO4 on:
Copper
Iron
Lead
Mercury
Which of the following statements is incorrect with regard to ortho and para-dihydrogen?
They are nuclear spin isomers
Ortho isomer has zero nuclear spin whereas the para isomer has one nuclear spin
The para isomer is favoured at low temperatures
The thermal conductivity of the para isomer is 50% greater than that of the ortho isomer.
The reagent commonly used to determine the hardness of water titrimetrically is:
Oxalic acid
Disodium salt of EDTA
Sodium citrate
Sodium thiosulphate
The moderator used in the nuclear reactor is:
TEL
D2O
H2O2
R-O-R
Which one of the following is heavy water used in nuclear reactors?
Water having a molecular weight of 18u
Water having a molecular weight of 20u
Water at 4°C having a molecular weight of 19u
Water below the ice in the frozen sea
A commercial sample of H2O2 marked as 100 volume hydrogen peroxide, it means that:
1 ml of H2O2 will give 100 ml O2 at STP
1 L of H2O2 will give 100 ml O2 at STP
1 L of H2O2 will give 22.4 L O2
1 ml of H2O2 will give 1 mole of O2 at STP
A commercial sample of hydrogen peroxide is labelled as 10 volumes. Its percentage strength is nearly:
1%
3%
10%
90%
The volume of oxygen evolved at STP by decomposition of 0.68 g hydrogen peroxide solution is:
2.24 mL
22.4 mL
224 mL
2240 mL
What is this structure of?
Structure of Ice
Structure of Buckminster Fullerene
Structure of Water
Structure of Iron
Water is oxidised to O2 by Fluorine
Water is oxidised to O2 by Highly Electropositive metals
Water is oxidised to O2 by Chlorine
Water is oxidised to O2 by Photosynthesis
Water can be easily reduced to dihydrogen by Fluorine.
Water can be easily reduced to dihydrogen by Chlorine.
Water can be easily reduced to dihydrogen by highly electropositive metals.
Water can be easily reduced to dihydrogen by Photosynthesis.
Water is oxidised to O2 during Photosynthesis.
Water is oxidised to O2 by Fluorine.
Water is oxidised to O2 by Chlorine.
Water is oxidised to O2 by Iodine.
Water has a very strong hydrating tendency. This is due to _______
dielectric constant
low dielectric constant
high dielectric constant
very high dielectric constant
What are the effects of Hard Water?
unsuitable for laundry
harmful for boilers
It is potable water
It is harmful for intestine
What are the ways to remove the Temporary Hardness of Water?
Ion-exchange method
Boiling
Calgon’s method
Clark’s method
What are the ways to remove the Permanent Hardness of Water?
Synthetic resins method
Calgon’s method
Treatment with washing soda (sodium carbonate)
Clark’s method
Ion-exchange method
What is zeolite/permutit?
sodium-calcium silicate
sodium aluminium chromate
sodium aluminium silicate
sodium aluminium borate
In which all ways can H2O2 be prepared?
It is obtained as a byproduct in the manufacture of sodium hydroxide and chlorine by the electrolysis of brine solution.
Acidifying barium peroxide and removing excess water by evaporation under reduced pressure gives hydrogen peroxide.
Electrolysis of acidified water using platinum
Peroxodisulphate, obtained by electrolytic oxidation of acidified sulphate solutions at high current density, on hydrolysis yields hydrogen peroxide.
What are the physical properties of H2O2?
miscible with water in all proportions and forms a hydrate
almost colourless (very pale blue) liquid
high freezing point
tasteless liquid
_______ has a non-planar structure.
Water
Ice
Hydrogen Sulphide
Hydrogen peroxide
Is this structure of H2O2 of Gaseous Phase or Solid Phase?
[ANSWER from (Gas/Solid)]
(a)
Is this structure of H2O2 of Gaseous Phase or Solid Phase?
[ANSWER from (Gas/Solid)]
(a)
Which chemical property does the picture describe of H2O2?
Oxidising action in acidic medium
Reducing action in acidic medium
Oxidising action in basic medium
Reducing action in basic medium
Which chemical property does the picture describe of H2O2?
Oxidising action in acidic medium
Reducing action in acidic medium
Oxidising action in basic medium
Reducing action in basic medium
Which chemical property does the picture describe of H2O2?
Oxidising action in acidic medium
Reducing action in acidic medium
Oxidising action in basic medium
Reducing action in basic medium
Which chemical property does the picture describe of H2O2?
Oxidising action in acidic medium
Reducing action in acidic medium
Oxidising action in basic medium
Reducing action in basic medium
H2O2 can be stored in
glass bowls or vessels in dark
wax-lined glass or plastic vessels in light
wax-lined glass or plastic vessels in dark
wooden bowls or vessels in light
_______ can be added as a stabiliser in H2O2?
Nitrogen
Urea
Phosphorous
Potassium
It is kept away from dust because dust can induce explosive decomposition of the compound.
TRUE
FALSE
The uses of H2O2 are:
(1) In daily life, it is used as hair bleach and as a mild disinfectant. As an antiseptic, it is sold in the market as perhydrol.
(2) It is used in the synthesis of hydroquinone, tartaric acid and certain food products and pharmaceuticals (cephalosporin) etc.
(3) It is used to manufacture chemicals like sodium perborate and per-carbonate, which are used in high-quality detergents.
(4) It is employed in the industries as a bleaching agent for textiles, paper pulp, leather, oils, fats, etc.
(5) Nowadays it is also used in Environmental (Green) Chemistry. For example, in pollution control treatment of domestic and industrial effluents, oxidation of cyanides, restoration of aerobic conditions to sewage wastes, etc.
Which of the following is correct?
Only (1)
Only (1) and (2)
(2), (4) and (5)
(1), (2), (3), (4), (5)
(3), (1), (2) ,and (5)
What has been used for exchange reactions for the study of reaction mechanisms?
H2O2
Heavy Water
Heavy Hydrogen
D2O
(a) can be prepared by exhaustive electrolysis of water or as a by-product in some fertilizer industries.
_______ is used for the preparation of other deuterium compounds
Heavy Hydrogen
Heavy Water
Compounds of isotopes don't exist
Hydrogen
