List of top Chemistry Questions

The correct order of hydration enthalpies of alkali metal ions is -
The mixture that forms maximum boiling azeotrope is :
The method used to remove temporary hardness of water is:
The polymer that is used as a substitute for wool in making commercial fibres is :
The biodegradable polymer is
Which of the following is not a broad spectrum antibiotics ?
How many gram of sodium (atomic mass $23\, u$) is required to prepare one mole of ethane from methyl chloride by Wurtz reaction?
Which of the following sets of solutions of urea (mol. mass $60 \,g\, mol^{-1}$) and sucrose (mol. mass $342\, g \,mol^{-1}$) is isotonic?
Which among the following is a neutral complex?
The molar solubility of CaF$_2$ (K$_{sp}$ = 5.3 × 10$^{-11}$) in 0.1 M solution of NaF will be
Among the following, the narrow spectrum antibiotic is :
The non-essential amino acid among the following is:
A compound is formed by cation C and anion A. The anions form hexagonal close packed (hep) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is :
The pH of 0.01 M NaOH (aq) solution will be
The density of 2 M aqueous solution of NaOH is 1.28 g/cm$^3$. The molality of the solution is [Given that molecular mass of NaOH = 40 g mol$^{-1}$]
The most stable carbocation, among the following is :-
The oxidation state of Cr in CrO6 is :
Among the following, the one that is not a green house gas is :
Propene when treated with cold conc. $H_{2}SO_{4}$ forms a compound which on heating with water gives
A water sample has ppm level concentration of the following metals: $Fe = 0.2; Mn = 5.0; Cu = 3.0; Zn = 5.0.$ The metal that makes the water sample unsuitable drinking is
The correct sequence of thermal stability of the following carbonates is
The amorphous form of silica is :
The ore that contains both iron and copper is:
Two pi and half sigma bonds are present in:
Noradrenaline is a /an