Chemistry Test ...

Which of the following conformations of butane is most unstable?

An organic compound weighing 0.31 g gave 0.444 g of magnesium pyrophosphate in the estimation of phosphorus by Carius method. The % of P in the compound is

In sulphur detection of an organic compound, sodium nitroprusside solution is added to sodium extract. Formation of violet colour is due to the presence of

Dimethyl glyoxime gives a red precipitate with Ni²⁺, which is used for its detection. To get this precipitate readily, the best pH range is

Which of the following compounds is purified by steam distillation?

The best method for separation, isolation, purification and identification of organic compound in a mixture is

In single state, the hybridisation of carbon atom of carbene is

The percentage s-character of the hybrid orbitals in methane, ethene and ethyne are respectively

The correct order of bond energies of the following bonds is:

(I) C(sp³)-C(sp³), (II) C(sp²)-C(sp²), (III) C(sp)-C(sp)

Consider the following compounds:

(i) Chloroethene

(ii) Benzene

(iii) 1,3-Butadiene

(iv) 1,3,5-Hexatriene

All the carbon atoms are sp2 hybridised in

Acid catalysed hydration of alkenes except ethene leads to the formation of

A group, which deactivates the benzene ring towards electrophilic substitution and directs the incoming group principally to the O and P position, is

Directions: In the following question, a statement of Assertion is given followed by a statement of Reason just below it. You have to read the statements carefully and choose the correct option accordingly.

Mark your answer as

(a) if both Assertion and Reason are true and Reason is the correct explanation for Assertion

(b) if both Assertion and Reason are true, but Reason is not the correct explanation for Assertion

(c) if Assertion is true, but Reason is false

(d) if both Assertion and Reason are false

Assertion: Rates of nitration of benzene and hexadeuterobenzene are different.

Reason: C - H bond is stronger than C - D bond.

Ethyne is oxidised by the action of alkaline solution of KMnO₄ to

Which of the following has the highest knocking?