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3 months ago

Chemistry Class 12th

The incorrect statement about the imperfections in solids is:

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Raj Pandey

Contributor-Level 9

Density of solid decreases in Schottky defect and vacancy defect.
Density of solid increases in interstitial defect.
Density of solid remain unchanged in Frenkel defect.

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3 months ago

Chemistry Class 12th

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : Dacron is an example of polyester polymer.

Reason R : Dacron is made up of ethylene glycol and terephthalic acid monomers.

In the light of the above statements, choose the most appropriate answer from the options given below.

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alok kumar singh

Contributor-Level 10

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3 months ago

Chemistry Class 12th

In Friedel-Crafts alkylation of aniline, one gets

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alok kumar singh

Contributor-Level 10

Aniline show acid-base reaction with AlCl₃

aniline is a Lewis base while AlCl₃ acts as lewis acid.

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Chemistry Class 12th

Two isomers (A) and (B) with molar mass 184 g/mol and elemental composition C, 52.2%; H. 4.9% and Br 42.9% gave benzoic acid and p-bromobenzoic acid respectively on oxidation with KMnO₄. Isomer 'A' is optically active and gives a pale yellow precipitate when warmed with alcoholic AgNO₃. Isomer 'A' and 'B' are respectively

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alok kumar singh

Contributor-Level 10

With AlCl₃, alkyl halide will form cabocation which will show rearrangement.

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Chemistry Class 12th

Kindly consider the following

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alok kumar singh

Contributor-Level 10

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Chemistry Chemistry Hydrocarbon

Which of the following carbocations is most stable?

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alok kumar singh

Contributor-Level 10

In this carbocation +M effect of -OCH₃ group stabilizes the carbocation.

While in option (A) and (B), +M of -OCH₃ will not work but in option (C), +M of -OCH₃ works so due to more delocalization in option (D), it is more stable.

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Chemistry Class 12th

Sulphur dioxide is one of the components of polluted air. SO₂ is also a major contributor to acid rain. The correct and complete reaction to represent acid rain caused by SO₂ is

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