List of top Chemistry Questions

An alkene having molecular formula \( {C}_7{H}_{14} \) was subjected to ozonolysis in the presence of zinc dust. An equimolar amount of the following two compounds was obtained. The IUPAC name of the alkene is:
 

An electron moving with speed \( v \) and a photon with speed \( c \), have the same de-Broglie wavelength. The ratio of kinetic energy of the electron to that of the photon is:
Which of the following is not a permissible arrangement of electrons in an atom?
In CsCl type structure, the co-ordination number of \( {Cs}^+ \) and \( {Cl}^- \) respectively are:
Which of the following order is not correct?
Rate of dehydration of alcohols follows the order:
The polymer used for optical lenses is:

The conjugate base of \( (\text{CH}_3)_2\text{NH}_2^+ \) is:

Water is:
Which one of the following reactions will not result in the formation of a carbon-carbon bond?
Assuming fully decomposed, the volume of \( {CO}_2 \) released will be:
Carboxylic acids are more acidic than phenol and alcohol because of:
The moles of methane required to produce 81 g of water after complete combustion is _____ × 10–2 mol. [nearest integer]
Match List - I with List - II 
List-I (Compound)                                              List-II (Shape)
A \(BrF _5\)                                                                    I bent 
B \(\left[ CrF _6\right]^{3-}\)                                                             II square pyramidal
C \(O _3\)                                                                     III trigonal bipyramidal 
D \(PCl _5\)                                                                    IV octahedral 
Choose the correct answer from the optionsgiven below :
Fig. Reaction

Consider the above reaction. The number of π electrons present in the product ‘P’ is _____ .

An organic compound ‘A’ on reaction with NH3 followed by heating gives compound B. Which on further strong heating gives compound C(C8H5NO2). Compound C on sequential reaction with ethanolic KOH, alkyl chloride and hydrolysis with alkali gives a primary amine. The compound A is :

The product formed in the following reaction.
The product formed in the reaction

When the excited electron of a H atom from n = 5 drops to the ground state, the maximum number of emission lines observed are ____.

At 300 K, a sample of 3.0 g of gas A occupies the same volume as 0.2 g of hydrogen at 200 K at the same pressure. The molar mass of gas A is _____ g mol–1. (nearest integer)
Assume that the behaviour of gases as ideal.
(Given: The molar mass of hydrogen (H2) gas is 2.0 g mol–1).
The difference in the reaction of phenol with bromine in chloroform and bromine in water medium is due to :
Phenol on reaction with dilute nitric acid, gives two products. Which method will be most efficient for large scale separation?
The pair, in which ions are isoelectronic with \(Al^{3+}\) is:
Among the following species
N2,N2+,N2−,N22−,O2,O2+,O2−,O22−
the number of species showing diamagnetism is ________.
lf the work function of a metal is 6.63 × 10–19 J, the maximum wavelength of the photon required to remove a photoelectron from the metal is ______ nm. (Nearest integer)
[Given : h = 6.63 × 10–34 J s, and c = 3 × 108 m s–1]
The number of terminal oxygen atoms present in the product B obtained from the following reaction is ______.
FeCr2O4 + Na2CO3 + O2 → A + Fe2O3 + CO2
A + H+ → B + H2O + Na+