List of top Chemistry Questions

Nitrobenzene on reaction with conc. $ {HNO_3/H_2SO_4 }$ at $ {80-100^{\circ} C}$ forms which one of the following products ?
Identify $Z$ in the following sequence $CH _{3} CH _{2} I \xrightarrow{ KCN } X \xrightarrow{ H _{3} O ^{+} / H _{2} O } Y \xrightarrow[\Delta]{H_3O^+/H_2O}Z$
A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be ?
?Sulphan? is
Silicone oil is obtained from the hydrolysis and polymerisation of
Ribose and 2-deoxyribose can be differentiated by
Identify the CORRECT statement
At $100^\circ C$ the $K_w$ of water is $55\, times$ its value at $25^\circ C$. What will be the pH of neutral solution ? $(log 55 = 1.74)$
A magnetic moment of 1.73 BM will be shown by one among the following :-
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 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
Which of the following cations will have minimum flocculation value for arsenic sulphide sol ?