List of top Chemistry Questions

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)
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__,
Arrange the following carbocations in decreasing order of stability.
carbocations
Refining using the liquation method is the most suitable for metals with:

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

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

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:

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?
The difference between spin only magnetic moment value of \([Co(H_2O)_6]Cl_2\) and \([Cr(H_2O)_6]Cl_3\) is ________ .
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
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

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]
Cerium (IV) has a noble gas configuration. Which of the following is correct statement about it?
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:

Match List I with List II.

 List I List II
AZymaseIStomach
BDiastaseIIYeast
CUreaseIIIMalt
DPepsinIVSoyabean

Choose the correct answer from the options given below.

Low oxidation state of metals in their complexes are common when ligands :
Which of the following enhances the lathering property of soap?
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Fluorine forms one oxoacid.
Reason R: Fluorine has smallest size amongst all halogens and is highly electronegative.
In the light of the above statements, choose the most appropriate answer from the option given below.
White precipitate of \(AgCl\) dissolves in aqueous ammonia solution due to formation of:
Manganese (VI) has ability to disproportionate in acidic solution. The difference in oxidation states of two ions it forms in acidic solution is _____.
Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution?

If the reaction sequence given below is carried out with 15 moles of acetylene, the amount of the product D formed (in g) is _____.

Reaction

The yields of A, B, C and D are given in parentheses.
[Given: Atomic mass of H = 1, C = 12, O = 16, Cl = 35]