Chemistry
Get insights from 6.9k questions on Chemistry, answered by students, alumni, and experts. You may also ask and answer any question you like about Chemistry
Follow Ask QuestionQuestions
Discussions
Active Users
Followers
New answer posted
a year agoContributor-Level 10
1. Acetylation refers to the process of introducing an acetyl group (resulting in an acetoxy group) into a compound, namely the substitution of an acetyl group for an active hydrogen atom. A reaction involving the replacement of the hydrogen atom of a hydroxyl group with an acetyl group (CH3CO) yields a specific ester, the acetate. Acetic anhydride is commonly used as an acetylating agent reacting with free hydroxyl groups., this reaction is usually carried out in the presence of base like pyridine.
2. Aldeydes having no α-H undergo the disproportion reaction in the presence of Strong alkali, it is a chemical reacti
New answer posted
a year agoContributor-Level 10
This is a matching answer type question as classified in NCERT Exemplar
(i) → (b); (ii) → (c); (iii) → (a)
New answer posted
a year 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
a year 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
a year 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
a year 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
a year 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
a year 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
a year 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
a year 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'.
Taking an Exam? Selecting a College?
Get authentic answers from experts, students and alumni that you won't find anywhere else
Sign Up on ShikshaOn Shiksha, get access to
- 66k Colleges
- 1.2k Exams
- 703k Reviews
- 1850k Answers