List of top Chemistry Questions

The mixture of chloroxylenol and terpineol is an example of

The correct structure of product ‘A’ formed in the following reaction, 

(Ph is – C6H5) is

Stearic acid and polyethylene glycol react to form which one of the following soap/s detergents?

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.

The eutrophication of water body results in:
Fe3+ cation gives a Prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of:
For a first order reaction \(A → B\), the rate constant, \(k = 5.5×10^{–14}s^{–1}\). The time required for 67% completion of reaction is \(x×10^{–1}\) times the half life of reaction. The value of \(x\) is _____. (Nearest integer)
Arrange the following carbocations in decreasing order of stability.
carbocations
Match List-I with List-II
List-I(Mixture) List-II(Purification Process)
(A) Chloroform & Aniline(I) Steam distillation
(B) Benzoic acid & Napthalene(II) Sublimation
(C) Water & Aniline(III) Distillation
(D) Napthalene & Sodium chloride(IV) Crystallisation
Choose the correct answer from the options given below:
In alanylglycylleucylalanyvaline, the number of peptide linkages is__,
The drug tegamet is:
Refining using the liquation method is the most suitable for metals with:

Match List-I with List-II:
 

List-I (Oxide)List-II (Nature)
(A) Cl2O7(I) Amphoteric
(B) Na2O(II) Basic
(C) Al2O3(III) Neutral
(D) N2O(IV) Acidic


Choose the correct answer from the options given below:

The difference between spin only magnetic moment value of \([Co(H_2O)_6]Cl_2\) and \([Cr(H_2O)_6]Cl_3\) is ________ .
Which of the following is the correct plot for the probability density ψ2(r) as a function of distance ‘r’ of the electron from the nucleus for 2s orbital?

\((C_7H_5O_2)_2\stackrel{ℎv}{→} [X]→2C_6H_5+2CO_2\)
Consider the above reaction and identify the intermediate ‘X’

The difference in the reaction of phenol with bromine in chloroform and bromine in water medium is due to:

The major product in the following reaction is:
 

Fig. Chemical Reaction

The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is

A white precipitate was formed when BaCl2 was added to water extract of an inorganic salt. Further, a gas ‘X’ with characteristic odour was released when the formed white precipitate was dissolved in dilute HCl. The anion present in the inorganic salt is
Cerium (IV) has a noble gas configuration. Which of the following is correct statement about it?

Match List I with List II.

 List I List II
AZymaseIStomach
BDiastaseIIYeast
CUreaseIIIMalt
DPepsinIVSoyabean

Choose the correct answer from the options given below.

Given below are two statements:
Statement I : The non bio-degradable fly ash and slag from steel industry used by cement industry.
Statement II : The fuel obtained from plastic waste is lead free.
In the light of the above statements, choose the most appropriate answer from the options given below:

For the reaction given below:
\(CoCl_3.xNH_3 + AgNO_3 (aq) →\)
If two equivalents of AgCl precipitate out, then the value of x will be____.

The elevation in boiling point for 1 molal solution of non-volatile solute A is 3 K. The depression in freezing point for 2 molal solution of A in the same solvent is 6 K. The ratio of Kb and Kf i.e., \(\frac{K_b}{K_f}\) is 1 : X. The value of X is [nearest integer]