List of top Chemistry Questions

Which is more basic oxygen in an ester?
All enzymes are made up of proteins and all proteins have three dimensional structures. Secondary structures of protein are sequence of amino acids.
Aniline does not undergo Friedel-Crafts reaction. Friedel-Crafts is an electrophilic substitution reaction.
Aniline does not undergo Friedel-Crafts reaction. Friedel-Crafts reaction is an electrophilic substitution reaction.
4 g of a hydrated crystal of formula AxH$_2$O has 0.8 g of water. If the molar mass of the anhydrous crystal (A) is 144 g mol$^{-1}$, x value is
Meso compounds do not show optical activity because
Adsorption theory is applicable for
Which of the following does not give oxygen on heating ?
Identify the correct order of solubility in aqueous medium :
Which of the following does not give oxygen on heating ?
Which of the following statements about the interstitial compounds is incorrect ?
Which of the following structure is similar to graphite?
Which one of the following sets of ions represents the collection of isoelectronic species ?
The process of zone refining is used in the purification of
The pressure on a square plate is measured by measuring the force on the plate. If the maximum error in the measurement of force and length are respectively $4\%$ and $2\%$, then the maximum error in the measurement of pressure is
When $1 \,$ mole of $CO_{2(g)}$ occupying volume $10\,L$ at $27^{\circ}C$ is expanded under adiabatic condition, temperature falls to $150\, K$. Hence, final volume is
What is the EAN of $[Al(C_4O_4)_3]^{3-}$ ?
The density of solid argon is $1.65\, g\, per\, cc$ at - $233^\circ C$. If the argon atom is assumed to be a sphere of radius $1.54 \times 10^{-8}\, cm$, what per cent of solid argon is apparently empty space? $(Ar = 40)$
The values of $K_{sp}$ of $CaCO_3$ and $CaC_2O_4$ are $4.7 \times 10^{-9}$ and $1.3 \times 10^{-9}$ respectively at $25�C$. If the mixture of these two is washed with water, what is the concentration of $Ca^{2+}$ ions in water?
An example for a neutral buffer is
The stability of a Lyophobic colloid is due to
Which of the following cations will have minimum flocculation value for arsenic sulphide sol ?
Mesomeric effect involves
$XeF_2$ is isostructural with:
Which one of the following molecules contains no $\pi$ bond ?