List of top Chemistry Questions

Which of the following conditions or reaction sequence will NOT give acetophenone as the major product?
Which of the following pairs is not isoelectronic species? 
(At. no. Sm, 62; Er, 68; Yb, 70; Lu, 71; Eu, 63; Tb, 65; Tm, 69)
Among the following, basic oxide is:
The reaction of
 Reaction with bromine and KOH
with bromine and \(KOH\) gives \(RNH_2\) as the end product. Which one of the following is the intermediate product formed in this reaction?
The amount of charge in F (Faraday) required to obtain one mole of iron from \(Fe_3O_4\) is ______ . (Nearest integer)

Match List-I with List-II :
 

List-IList-II
(A) Negatively charged sol(I) Fe2O3.xH2O
(B) Macromolecular colloid(II) CdS sol
(C) Positively charged sol(III) Starch
(D) Cheese(IV) a gel


Choose the correct answer from the options given below:

Among the following structures, which will show the most stable enamine formation? 
(Where Me is –CH3)

Amongst the following, the major product of the given chemical reaction is

Amongst the following, the major product of

Arrange the following coordination compounds in the increasing order of magnetic moments. (Atomic numbers: \(Mn = 25; Fe = 26\))
(1) \([FeF_6]^{3–}\)
(2) \([Fe(CN)_6]^{3–}\)
(3) \([MnCl_6]^{3–}\) (high spin)
(4) \([Mn(CN)_6]^{3–}\)
Which of the following reagents/reactions will convert ‘A’ to ‘B’?
reagents/reactions
Vulcanization of rubber is carried out by heating a mixture of
The spin-only magnetic moment value of the compound with strongest oxidizing ability among MnF4, MnF3 and MnF2 is____ B.M. [nearest integer]
17.0 g of NH3 completely vapourises at – 33.42°C and 1 bar pressure and the enthalpy change in the process is 23.4 kJ mol–1 . The enthalpy change for the vapourisation of 85 g of NH3 under the same conditions is ____ kJ.
An antiseptic Dettol is a mixture of two compounds ‘A’ and ‘B’ where A has 6π electrons and B has 2π electrons. What is ‘B’?
s-block element which cannot be qualitatively confirmed by the flame test is
The intermediate X, in the reaction is:
The intermediate X, in the reaction
Which of the following compounds is not aromatic?
Choose the correct stability order of group 13 elements in their +1 oxidation state
Hydrogen has three isotopes: protium (1H), deuterium (2H or D) and tritium (3H or T). They have nearly same chemical properties but different physical properties. They differ in
Identify the incorrect statement for \(PCl_5\) from the following.
Which of the following is not an example of benzenoid compound?

Identify the major product formed in the following sequence of reactions:

The ′f′ orbitals are half and completely filled, respectively in lanthanide ions
[Given: Atomic no. Eu, 63; Sm, 62; Tm, 69; Tb, 65; Yb, 70; Dy, 66]
Fig.

The stable carbocation formed in the above reaction is

How many of the given compounds will give a positive Biuret test_________? Glycine, Glycylalanine, Tripeptide, Biuret.