List of top Chemistry Questions

Identify the major product in the following reaction

Identify the major product in the following reaction.

Which of the following orders are correct for noble gases?
A. Solubility in water He<Ne < Ar<Kr<Xe
B. Boiling points He< Ne <Ar<Kr <Xe
C. Chemical reactivity He > Ne >Ar> Kr > Xe
D. Enthalpy of vaporisation He> Ne > Ar> Kr> Xe
Choose the correct answer from the options given below:

Arachno and nido structure of Boranes have general formula respectively

The following reaction undergoes via _________ and is known as ______ reaction.

What are the most common electronic transition(s) associated with carbonyl functional group?
\(\alpha\rightarrow\pi\) 
\(\alpha\rightarrow n\) 
\(n \rightarrow \pi^*\)
\(\pi \rightarrow \pi^*\)

Given below are two statements:
Statement I: To form interstitial alloys, the radius ratio of smaller atom/larger atom should be in the range 0.414-0.732.
Statement II: Two different metals having metallic radii differing only by 10% but similar crystal structures can form a good alloy.
In the light of the above statements, choose the most appropriate answer from the options given below:

The following carbonyl compounds absorb IR radiations in the decreasing order.
A.
B.
C.
D.
Choose the correct answer from the options given below:

The galvanic cell with the cell reaction
Mg(s) + 2Ag⁺ (0.001M)→ Mg²⁺ (0.65M) + 2Ag(s)
is correctly represented as

Which of the following compound represent the correct structure of (2R, 3S)-2,3-pentanediol?

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: The moving boundary method yields more accurate data on transference number than does the Hittorf method.
Reason R: In moving boundary method, indicator electrolyte has same anion as principal electrolyte and is placed at the bottom due to its higher density.
In the light of the above statements, choose the most appropriate answer from the options given below:

Phenol derivatives can be prepared from corresponding chlorobenzene derivatives via nucleophilic substitution reaction only when it contains

The structure of a carborane, \(C_2B_5H_7\), is

A monochromatic radiation is incident on a solution of 0.05 molar concentration of an absorbing substance. The intensity of the radiation is reduced to one fourth of the initial value after passing through 10 cm length of the solution. Calculate the molar extinction. coefficient of the substance.

Which of the following expression holds good for Freundlich adsorption isotherm ?

Identify the major product in the following reaction.

Identify the infrared active molecules from the following
A. N₂
B. NO
C. CO
D. CO₂
Choose the correct answer from the options given below:

The initial rate of a reaction in which the substrate, S, undergoes a reaction in the presence of catalyst C, was found to be equal to v₀ = \(\frac{K_2[S]_0[C]_0}{[S]_0+Km} \)The probable condition in which the reaction took place was

Phenylbenzoate can be prepared from phenol using which of the following name reaction?

Which among the elements of Lanthanoid series often exhibit +4 oxidation state?

Identify the class of the following reaction.

Membrane filters are not manufactured from which of following polymers

Give below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: The surface tension of a liquid is the combined strength of the polar of dispersion forces that are pulling on the molecules in the surface of the liquid.
Reason R: The addition of small quantities ion of impurities will alter the surface tension.
In the light of the above statements, choose the most appropriate answer from the options given below:

The hydrolysis products of \(Al_4,C_3\), and \(Be_2C\) are

Which of the following is NOT a cellulosic fibre?