List of top Chemistry Questions

Pollution is
Potassium metabisulphite is a (an)
The number of metamers possible for $ C_4H_{10}O $ is
The wave number of the spectral line in the emission spectrum of hydrogen will be equal to $\frac {8}{9}$ times the Rydberg's constant if the electron jumps from _______
The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
Gibb's free energy G is defined as
Hofmann's bromamide reaction is used to convert
Which of the following ores will be concentrated by froth floatation method?
For a cell reaction involving two electron change, the standard e.m.f. of the cell is found to be 0.295 Vat 298 K. The equilibrium constant of the reaction at the same temperature will be
IUPAC name of $ {K_3[Fe(CN)_6]}$ is
If the rate equation for reaction is, rate =$ k[A][B]^{1/2}$, the order of reaction is
Which of the following is not used to distinguish ethane from ethene ?
In the manufacture of NaOH, by electrolysis of an aqueous solution of sodium chloride, the cathode and anode are separated by using a diaphragm because
The type of hybridisation of nitrogen atom in $ {NH_3}$ is
The indicator used in the titration of sodium carbonate and hydrochloric acid is
The pH of 0.01 M KOH is
Fehling's reagent contains
Equivalent mass of $ {K_2Cr_2O_7}$ in acidic solution is equal to
The outer electronic configuration $s^2p^5$ is possessed by
Which of the following pairs is isoelectronic?
Which of the following is a constituent of oil of wintergreen?
75% of a first order reaction was completed in 32 minutes. When was 50% of the reaction completed
Among solids, the higher melting point is exhibited by
Which of the following molecules exist?
In sucrose, the glycosidic linkage is