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Chapters
2: Quantum Mechanical Model of Atom
3: Periodic Classification Of Elements
▶ 4: Hydrogen
5: Alkali and Alkaline Earth Metals
6: Gaseous State
7: Thermodynamics
8: Physical and Chemical Equilibrium
9: Solutions
10: Chemical bonding
11: Fundamentals of Organic Chemistry
12: Basic concept of organic reactions
13: Hydrocarbons
14: Haloalkanes and Haloarenes
15: Environmental Chemistry
![Samacheer Kalvi solutions for Chemistry - Volume 1 and 2 [English] Class 11 TN Board chapter 4 - Hydrogen - Shaalaa.com](/images/chemistry-volume-1-and-2-english-class-11-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Chemistry - Volume 1 and 2 [English] Class 11 TN Board chapter 4 - Hydrogen")
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Solutions for Chapter 4: Hydrogen
Below listed, you can find solutions for Chapter 4 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Chemistry - Volume 1 and 2 [English] Class 11 TN Board.
Samacheer Kalvi solutions for Chemistry - Volume 1 and 2 [English] Class 11 TN Board 4 Hydrogen Evaluation [Pages 119 - 123]
Choose the best answer
Which of the following statements about hydrogen is incorrect?
Hydrogen ion, \[\ce{H3O^+}\] exists freely in solution.
Dihydrogen acts as a reducing agent.
Hydrogen has three isotopes of which tritium is the most common.
Hydrogen never acts as cation in ionic salts.
Water gas is
\[\ce{H2O_{(g)}}\]
\[\ce{CO + H2O}\]
\[\ce{CO + H2}\]
\[\ce{CO + N2}\]
Which one 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.
Ionic hydrides are formed by ________.
halogens
chalcogens
inert gases
group one elements
Tritium nucleus contains
1p + 0n
2p + 1n
1p + 2n
none of these
Non-stoichiometric hydrides are formed by __________.
palladium, vanadium
carbon, nickel
manganese, lithium
nitrogen, chlorine
Assertion: Permanent hardness of water is removed by treatment with washing soda.
Reason: Washing soda reacts with soluble calcium and magnesium chlorides and sulphates in hard water to form insoluble carbonates.
Both assertion and reason are true and reason is the correct explanation of assertion.
Both assertion and reason are true but reason is not the correct explanation of assertion.
Assertion is true but reason is false
Both assertion and reason are false
If a body of a fish contains 1.2 g hydrogen in its total body mass, if all the hydrogen is replaced with deuterium then the increase in body weight of the fish will be
1.2 g
2.4 g
3.6 g
`sqrt4.8` g
The hardness of water can be determined by volumetrically using the reagent
sodium thiosulphate
potassium permanganate
hydrogen peroxide
EDTA
The cause of permanent hardness of water is due to
Ca(HCO3)2
Mg(HCO3)2
CaCl2
MgCO3
Zeolite used to soften hardness of water is, hydrated ___________.
Sodium aluminium silicate
Calcium aluminium silicate
Zinc aluminium borate
Lithium aluminium hydride
A commercial sample of hydrogen peroxide marked as 100 volume H2O2, 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
When hydrogen peroxide is shaken with an acidified solution of potassium dichromate in presence of ether, the ethereal layer turns blue due to the formation of
\[\ce{Cr2O3}\]
\[\ce{CrO^2-_4}\]
\[\ce{CrO(O2)2}\]
none of these
For decolourisation of 1 mole of acidified KMnO4, the moles of H2O2 required is
`1/2`
`3/2`
`5/2`
`7/2`
Volume strength of 1.5 N H2O2 is
1.5
4.5
16.8
8.4
The hybridisation of oxygen atom is H2O and H2O2 are, respectively
sp and sp3
sp and sp
sp and sp2
sp3 and sp3
The reaction \[\ce{H3PO2 + D2O -> H2DPO2 + HDO}\] indicates that hypo-phosphorus acid is
tribasic acid
dibasic acid
monobasic acid
none of these
In solid ice, the oxygen atom is surrounded
tetrahedrally by 4 hydrogen atoms
octahedrally by 2 oxygen and 4 hydrogen atoms
tetrahedrally by 2 hydrogen and 2 oxygen atoms
octahedrally by 6 hydrogen atoms
The type of H-bonding present in ortho nitrophenol and p-nitrophenol are respectively
intermolecular H-bonding and intramolecular H-bonding
intramolecular H-bonding and intermolecular H-bonding
intramolecular H-bonding and no H-bonding
intramolecular H-bonding and intramolecular H-bonding
Heavy water is used as
moderator in nuclear reactions
coolant in nuclear reactions
both moderator in nuclear reactions and coolant in nuclear reactions
none of these
Water is a _________.
basic oxide
acidic oxide
amphoteric oxide
none of these
Write brief answer to the following questions
Explain why hydrogen is not placed with the halogen in the periodic table.
Discuss the three types of Covalent hydrides.
Predict which of the following hydrides is a gas on a solid
- HCl
- NaH
Give your reason.
Write the expected formulas for the hydrides of 4th-period elements. What is the trend in the formulas? In what way the first two members of the series different from the others?
Write a chemical equation for the following reaction.
Reaction of hydrogen with tungsten (VI) oxide on heating.
Write a chemical equation for the following reaction.
Hydrogen gas and chlorine gas.
Complete the following chemical reaction and classify the reaction.
\[\ce{KMnO4 + H2O2 ->}\]
Hydrolysis reaction
Redox reaction
Hydration reaction
Complete the following chemical reaction and classify the reaction.
\[\ce{CrCl3 + H2O ->}\]
Hydrolysis reaction
Redox reaction
Hydration reaction
Complete the following chemical reaction and classify the reaction.
\[\ce{CaO + H2O ->}\]
Hydrolysis reaction
Redox reaction
Hydration reaction
Hydrogen peroxide can function as an oxidising agent as well as the reducing agent. substantiate this statement with suitable examples.
Do you think that heavy water can be used for drinking purposes?
What is a water-gas shift reaction?
Justify the position of hydrogen in the periodic table?
What are isotopes?
Write the names of isotopes of hydrogen.
Give the uses of heavy water.
Explain the exchange reactions of deuterium.
How do you convert para-hydrogen into ortho hydrogen?
Mention the uses of deuterium.
Explain the preparation of hydrogen using electrolysis.
A group-1 metal (A) which is present in common salt reacts with (B) to give compound (C) in which hydrogen is present in –1 oxidation state. (B) on reaction with a gas (C) to give universal solvent (D). The compound (D) on reacts with (A) to give (E), a strong base. Identify A, B, C, D and E. Explain the reactions.
An isotope of hydrogen (A) reacts with diatomic molecule of element which occupies group number 16 and period number 2 to give compound (B) is used as a moderator in nuclear reaction. (A) adds on to a compound (C), which has the molecular formula C3H6 to give (D). Identify A, B, C and D.
NH3 has an exceptionally high melting point and boiling point as compared to those of the hydrides of the remaining element of group 15 - Explain.
Why interstitial hydrides have a lower density than the parent metal?
How do you expect the metallic hydrides to be useful for hydrogen storage?
Arrange NH3, H2O and HF in the order of increasing magnitude of hydrogen bonding and explain the basis for your arrangement.
Compare the structures of H2O and H2O2.
Solutions for 4: Hydrogen
Samacheer Kalvi solutions for Chemistry - Volume 1 and 2 [English] Class 11 TN Board chapter 4 - Hydrogen
Shaalaa.com has the Tamil Nadu Board of Secondary Education Mathematics Chemistry - Volume 1 and 2 [English] Class 11 TN Board Tamil Nadu Board of Secondary Education solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. Samacheer Kalvi solutions for Mathematics Chemistry - Volume 1 and 2 [English] Class 11 TN Board Tamil Nadu Board of Secondary Education 4 (Hydrogen) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
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Concepts covered in Chemistry - Volume 1 and 2 [English] Class 11 TN Board chapter 4 Hydrogen are Hydrogen, Preparation of Hydrogen Peroxide, Properties of Hydrogen, Uses of Hydrogen Peroxide, Compounds of Hydrogen, Heavy Water, Hydrogen Peroxide, Hydrides, Hydrogen Bonding - Introduction.
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