List of top Chemistry Questions

For a diprotic acid, which of the following is true for first and second ionization constants? $ (K_{a_1} $ and $ K_{a_2} $ ).

At equilibrium which is correct?

If $K_{sp}$ of $CaF_2$ at $25^??$ is $1.7 \times 10^{-10}$, the combination amongst the following which gives a precipitate of $CaF_2$ is

$\frac{K_{p}}{K_{c}}$ for following reaction will be $\quad\quad$$CO_{\left(g\right)}+\frac{1}{2}O_{2\left(g\right)}\rightarrow CO_{2\left(g\right)}$

In chemical equilibrium, the value of $\Delta n$ is negative, then the relationship between $K_p$ and $K_c$ will be

On adding which of the following, the pH of $20\, ml$ of $0.1\, N\, HCl$ will not alter ?

The equilibrium constant $\left(K_{c}\right)$ for the reaction $N_{2}$$_{(g)}$ + $O_{2}$ $_{(g)} \to 2NO \left(g\right)$ at temperature T is $4 � 10^{-4}$. Thevalue of Kc for the reaction $NO$$_{(g)} \to \frac{1}{2} N_{2}$$_{(g)} + \frac{1}{2} O_{2}$$_{(g)}$ at the same temperature is :

In a reversible chemical reaction at equilibrium, if the concentration of any one of the reactants is doubled, then the equilibrium constant will

$5\, ml$ of $0.4\, N\, NaOH$ is mixed with $20\, ml$ of $0.1\, N\, HCl$. The $pH$ of the resulting solution will be

The boiling point of water is exceptionally high because

Which of the following is soluble in yellow ammonium sulphide?

Three very large plates of same area are kept parallel and close to each other. They are considered as ideal black surfaces and have very high thermal conductivity. The first and third plates are maintained at temperatures 2T and 3T respectively. The temperature of the middle (i.e. second) plate under steady state condition is

The reaction of white phosphorus with aqueous $NaOH$ gives phosphine along with another phosphorus containing compound. The reaction type, the oxidation states of phosphorus in phosphine and the other product respectively are

The, following molecule has a linear shape

What is $DDT$ among the following :

Tollen�s reagent and Fehling solutions are used to distinguish between

The energy currency of the cell is

The electrolyte used in Leclanche cell is

The correct order of ligands in the spectrochemical series is

Saccharin, an artificial sweetner, is manufactured from

Phenyl isocyanide is formed when chloroform is treated with alcoholic potassium hydroxide and

$MnO_3$ in an acidic medium dissociates into

$ CH_3COOH {->[LiAlH_4]} A + CH_3COOH {->[H_3O^+]}B + H_2O$ In the above reactions A and B respectively are

Bleaching powder and bleach solution are produced on a large scale and used in several household products. The effectiveness of bleach solution is often measured by iodometry. Bleaching powder contains a salt of an oxoacid as one of its components. The anhydride of that oxoacid is

Which of the following on thermal decomposition yields a basic as well as acidic oxide ?