List of top Chemistry Questions

Which transition in the hydrogen spectrum would have the same wavelength as the Balmer type transition from $n =4$ to $n =2$ of $He ^{+}$spectrum

Which product is obtained between the reaction of CH3ONa and (CH3)3CBr?
The magnetic behavior of Li2O, Na2O2 and KO2, respectively, are

Which of the following compounds would give the following set of qualitative analysis?
• (i) Fehling’s Test: Positive
• (ii) Na fusion extract upon treatment with sodium nitroprusside gives a blood red colour but not

A reaction is first order in terms of A and second order in terms of B. What will be the rate of reaction, If the concentration of B is increased two times?
Four gases A, B, C and D have critical temperatures 5.3, 33.2, 126.0 and 154.3K respectively. For their adsorption on fixed amount of charcoal, the correct order is :
The strongest acid from the following is
The most stable carbocation for the following is:

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) 
Assertion (A) : An aqueous solution of \(KOH\) when used for volumetric analysis, its concentration should be checked before the use 
Reason (R) : On aging,\(KOH\) solution absorbs atmospheric \(CO _2\)
In the light of the above statements, choose the correct answer from the options given below :

What are two monomers of Glyptal polymer?
The correct representation in six-membered pyranose form for the following sugar $ [X]$ is 
Match the following
Column-AColumn-B
 Nylon 6Natural Rubber 
Vulcanized RubberCross Linked 
cis-1,4-polyisopreneCaprolactam 
PolychloropreneNeoprene.

Choose the correct answer from option given below

Find out the major products from the following reaction sequence.
Find out the major products from the following reaction sequence

Decreasing order of the hydrogen bonding in following forms of water is correctly represented by
A. Liquid water
B. Ice
C. Impure water 
Choose the correct answer from the options given below:

Which one among the following metals is the weakest reducing agent?
Which hydride among the following is less stable?
The major product formed in the following reaction is
Match List l with List ll.
List I Coordination Complex List II Number of unpaired electrons
(I) [Cr(CN)6]3- (a) 0
(II) [Fe(H2O)6]2+ (b) 3
(III) [Co(NH3)6]3+ (c) 2
(IV) [Ni(NH3)6]2+ (d) 4
Choose the correct answer from the options given below:
Match List I with List II :
List-I Coordination entityList-II Wavelength of light absorbed in nm
A.\([CoCl(NH_3​)_5​]^{2+}\)I.310
B.\([Co(NH_3​)_6​]^{3+}\)II.475
C.\([Co(CN)_6​]^{3−}\)III.535
D.\([Cu(H_2​O)_4​]^{2+}\)IV.600
Choose the correct answer from the options given below :
How much gram of ethanol is required to obtain 280 ml dihydrogen at S.T.P by reaction of C2H5OH with Na metal(Mol.wt of ethanol =46 g/mol)?
which artificial sweetening agent is limited for cold food and soft drinks?
The number of following statements which are incorrect line emission
Correct statement is:
A compound forms a hexagonal closed packed structure. What is the number of tetrahedral voids in 0.8 mol of it?
The number of molecules from the following which contain only two lone pair of electrons is _____ .
\(H_2O, N_2, CO, XeF_4, NH_3, NO, CO_2, F_2\)