Tags Hydrogen

Hydrogen

Get insights from 182 questions on Hydrogen, answered by students, alumni, and experts. You may also ask and answer any question you like about Hydrogen

Follow Ask Question

182

Questions

Discussions

Active Users

Followers

New answer posted

4 months ago

Hydrogen Chemistry NCERT Exemplar Solutions Class 11th Chapter Nine

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A): Permanent hardness of water is removed by treatment with washing soda.

Reason (R): Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates.

(i) Statements A and R both are correct and R is the correct explanation of A.

(ii) A is correct but R is not correct.

(iii) A and R both are correct but R is not the correct explanation of A.

(iv) A and R both are false.

0 Follower 2 Views

Payal Gupta

Contributor-Level 10

This is a assertion and reason answer type question as classified in NCERT Exemplar

(i) Statements A and R both are correct and R is the correct explanation of A.

MCl₂+Na₂CO₃→ MCO₃+2NaCl

MSO₄+Na₂CO₃→MCO₃+Na₂SO₄

0 0

New answer posted

4 months ago

Hydrogen Chemistry NCERT Exemplar Solutions Class 11th Chapter Nine

Match the items in Column I with the relevant item in Column II.

Column I	Column II
(i) Hydrogen peroxide is used as a	(a) zeolite
(ii)Used in Calgon method	(b) perhydrol
(iii)Permanent hardness of hard water is removed by	(c) sodium hexametaphosphate
	(d) propellant

0 Follower 2 Views

Payal Gupta

Contributor-Level 10

This is a matching answer type question as classified in NCERT Exemplar

(i) → (b); (ii) → (c); (iii) → (a)

0 0

New answer posted

4 months ago

Hydrogen Chemistry NCERT Exemplar Solutions Class 11th Chapter Nine

Match the terms in Column I with the relevant item in Column II.

Column I	Column II
(i) Electrolysis of water produces	(a) atomic reactor
(ii)Lithium aluminum hydride is used as	(b) polar molecule
(iii)Hydrogen chloride is a	(c) recombines on metal surface to generate high temperature
(iv) Heavy water is used in	(d) reducing agent
(v) Atomic hydrogen	(e) hydrogen and oxygen

0 Follower 2 Views

Payal Gupta

Contributor-Level 10

This is a matching answer type question as classified in NCERT Exemplar

(i)→ (e); (ii)→ (d); (iii)→ (b); (iv)→ (a); (v)→ (c)

0 0

New answer posted

4 months ago

Hydrogen Chemistry NCERT Exemplar Solutions Class 11th Chapter Nine

Match Column I with Column II for the given properties/applications mentioned therein.

Column I	Column II
(i) H	(a) Used in the name of perhydrol.
(ii)H₂	(b) Can be reduced to dihydrogen by NaH.
(iii)H₂O	(c) Can be used in hydroformylation of olefin.
(iv) H₂O₂	(d) Can be used in cutting and welding.

0 Follower 3 Views

Payal Gupta

Contributor-Level 10

This is a matching answer type question as classified in NCERT Exemplar

(i)→ (d); (ii)→ (b); (iii)→ (c); (iv)→ (a)

0 0

New answer posted

4 months ago

Hydrogen Chemistry NCERT Exemplar Solutions Class 11th Chapter Nine

Correlate the items listed in Column I with those listed in Column II. Find out as many correlations as you can.

Column I	Column II
(i) Synthesis gas	a. Na₂[Na₄(PO₃)₆]
(ii) Dihydrogen	(b) Oxidising agent
(iii) Heavy water	(c) Softening of water
(iv) Calgon	(d) Reducing agent
(v) Hydrogen peroxide	(e) Stoichiometric compounds of s-block elements
(vi) Salt like hydrides	(f) Prolonged electrolysis of water
	(g) Zn + NaOH
	(h) Zn + dil. H₂SO₄
	(i) Synthesis of methanol
	(j) Mixture of CO and H₂

0 Follower 2 Views

Payal Gupta

Contributor-Level 10

This is a matching answer type question as classified in NCERT Exemplar

(i) → (j); (ii) → (h); (iii) → (f) : (iv) → (a); (v) → (b); (vi) → (e)

0 0

New answer posted

4 months ago

Hydrogen Chemistry NCERT Exemplar Solutions Class 11th Chapter Nine

Which of the following statements is correct?

(i) Metallic hydrides are deficient in hydrogen.

(ii) Metallic hydrides conduct heat and electricity.

(iii) Ionic hydrides do not conduct electricity in solid state.

(iv) Ionic hydrides are very good conductors of electricity in solid state.

0 Follower 5 Views

Payal Gupta

Contributor-Level 10

This is a multiple choice answer as classified in NCERT Exemplar

Option (i), (ii) and (iii)

Ionic hydrides are crystalline, non-volatile and non-conducting in solid state

0 0

New answer posted

4 months ago

Hydrogen Chemistry NCERT Exemplar Solutions Class 11th Chapter Nine

Which of the following statements is correct?

(i) Hydrides of group 13 act as Lewis acids.

(ii) Hydrides of group 14 are electron deficient hydrides.

(iii) Hydrides of group 14 act as Lewis acids.

(iv) Hydrides of group 15 act as Lewis bases.

0 Follower 2 Views

Payal Gupta

Contributor-Level 10

This is a multiple choice answer as classified in NCERT Exemplar

Option (i) and (iv)

All elements in group 13 are Lewis acids because they form electron-deficient compounds. Excess electrons are found as lone pairs in electron-rich hydrides.

These compounds are made up of elements from groups 15-17. (NH₃ has one lone pair, H₂O has two, and HF has three.) As a result, they act as Lewis bases.

0 0

New answer posted

4 months ago

Hydrogen Chemistry NCERT Exemplar Solutions Class 11th Chapter Nine

Which of the following statements is correct?

(i) Elements of group 15 form electron deficient hydrides.

(ii) All elements of group 14 form electron precise hydrides.

(iii) Electron precise hydrides have tetrahedral geometries.

(iv) Electron rich hydrides can act as Lewis acids.

0 Follower 1 View

Payal Gupta

Contributor-Level 10

This is a multiple choice answer as classified in NCERT Exemplar

Option (ii) and (iii)

Electron precise hydrides have the required number of electrons to write their conventional Lewis structures. All elements of group 14 form such compounds (e.g., CH₄) which are tetrahedral in geometry.

0 0

New answer posted

4 months ago

Hydrogen Chemistry NCERT Exemplar Solutions Class 11th Chapter Nine

Hardness of water may be temporary or permanent. Permanent hardness is due to the presence of

(i) Chlorides of Ca and Mg in water

(ii) Sulphates of Ca and Mg in water

(iii) Hydrogen carbonates of Ca and Mg in water

(iv) Carbonates of alkali metals in water

0 Follower 1 View

Payal Gupta

Contributor-Level 10

This is a multiple choice answer as classified in NCERT Exemplar

Option (i) and (ii)

Presence of calcium and magnesium salts in the form of hydrogen carbonate, chloride and sulphate in water makes water 'hard'.

0 0

New answer posted

4 months ago

Hydrogen Chemistry NCERT Exemplar Solutions Class 11th Chapter Nine

Some of the properties of water are described below. Which of them is/ are not correct?

(i) Water is known to be a universal solvent.

(ii) Hydrogen bonding is present to a large extent in liquid water.

(iii) There is no hydrogen bonding in the frozen state of water.

(iv) Frozen water is heavier than liquid water.

0 Follower 2 Views

Payal Gupta

Contributor-Level 10

This is a multiple choice answer as classified in NCERT Exemplar

Option (iii) and (iv)

The presence of extensive hydrogen bonding between water molecules gives it remarkable features in the condensed phase (liquid and solid phases). In comparison to H₂S and H₂Se, this results in a high freezing point, high boiling point, high heat of vaporisation, and high heat of fusion.

0 0

Get authentic answers from experts, students and alumni that you won't find anywhere else

On Shiksha, get access to

65k Colleges
1.2k Exams
682k Reviews
1800k Answers

Community GuidelinesUser Points System

QuestionsDiscussionsTags

Need guidance on career and education? Ask our experts

Your Question

Hydrogen

Questions

Discussions

Active Users

Followers

All

Discussions

Unanswered Questions

Share Your College Life Experience