Chemistry
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New answer posted
9 months agoContributor-Level 10
This is a matching answer type question as classified in NCERT Exemplar
(i) → (b); (ii) → (c); (iii) → (a)
New answer posted
9 months agoContributor-Level 10
This is a matching answer type question as classified in NCERT Exemplar
(i)→ (e); (ii)→ (d); (iii)→ (b); (iv)→ (a); (v)→ (c)
New answer posted
9 months agoContributor-Level 10
This is a matching answer type question as classified in NCERT Exemplar
(i)→ (d); (ii)→ (b); (iii)→ (c); (iv)→ (a)
New answer posted
9 months agoContributor-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)
New answer posted
9 months agoContributor-Level 10
1. When propanone reacts with NaBH4 it will form propan-2-ol.This alcohol is dehydrated to form propene.
2. When benzoic acid is treated with SOCl2 it chlorinates the acid. After controlled hydrogenation it forms benzaldehyde
3. When ethanol is treated with Cu at 573 k, it will oxidize to ethanal. When ethanal is treated with Dil.NaOH it will form 3-Hydroxy butanal
4. After frieadal craft acylation of benzene it will convert into acyl benzene. And further treating with nitrating mixture it forms m-nitroaceto phenone .
5. When benzaldehyde is oxidized with dichromate and treated with calcium carbonate it forms calcium salt. And after dry di
New answer posted
9 months agoContributor-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
New answer posted
9 months agoContributor-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.
New answer posted
9 months agoContributor-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.
New answer posted
9 months agoContributor-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'.
New answer posted
9 months agoContributor-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.
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