List of top Chemistry Questions

In the ground state, an element has 13 electrons in its ''M shell''. The element is
At what temperature will the r.m.s. velocity of $SO_2$ be the same as that of $O_2$ at 303 K ?
Hydrogen ion concentration of an aqueous solutionis $1 \times 10^{-4} M$. The solution is diluted with equal volume of water. Hydroxyl ion concentration of the resultant solution in terms of mol $dm^{-3}$ is
Percentage of Se in peroxidase anhydrous enzyme is 0.5% by weight (at. wt = 78.4) then minimum molecular weight of peroxidase anhydrous enzymes is
Which one of the following is an incorrect statement ?
The oxidation number of cobalt in $K[Co(CN)_4]$ is
In X- H ----- Y, X and Y both are electronegative elements 
The unpleasant smell of carbylamine is obtained when chloroform and alcoholic KOH are heated with
For certain first order reaction m, 75% of the reaction complete in 30 min. How much time it require to complete 99.9% of the reaction?
Which one correctly matched
Sp. vol. of cylinderical virus particle is 6.02 × 10^-2 cc/gm. Whose radius and length are 7 Å & 10Å respectively. If NA = 6.02 × 10^23. Find mol. wt. of virus
Which of following give positive Fehling solution test
When the temperature of reactions will increase then the effect on $pH$ value will
In which of the following $p \pi$ - $d \pi$ bonding is possible?
Which salt shows maximum osmotic pressure in its 1 M solution?
The rate of a first order reaction is $ 0.693\times {{10}^{-2}}\,mol\,{{L}^{-1}}\,{{\min }^{-1}} $ and the initial concentration of the reactants is 1 M, $ {{t}_{1/2}} $ is equal to:
If I is the intensity of absorbed light and C is the concentration of AB for the photochemical process.$AB + hv\rightarrow$ AB, for the rate of formation of AB is directly proportional to
In the standardisation of Na$_2S_2O_3$ using K$_2Cr_2O_7$ by iodometry, the equivalent weight of K$_2Cr_2O_7$ is
The reaction,$3CIO^{-}(aq)\rightarrow CIO_3^- (aq)+2CI^-(aq)$ is an example of
An aqueous solution of $6.3\, g$ oxalic acid dehydrate is made upto $250\, mL$. The volume of $0.1N\, NaOH$ required to completely neutralize $10 \,ml$. of this solution is
Which of the following is most stable carbocation?
Which one of the following can be classified as a Bronsted base ?
At constant temperature, the equilibrium constant $ ( K_p)$ the decomposition reaction, $ N_2 O_4 \rightleftharpoons NO_2$, is expressed by $ K_p = \frac{ 4x^2 \, p }{ (1 - x^2 ) } , $ where, $ p$ = pressure,$ x $ = extent of decomposition. Which one of the following statement is true ?
The conjugate base of $ OH^{-}$ is:
A solution of sodium borate has a pH of approximately: