List of top Chemistry Questions

During electrolysis of dilute $H_2SO_4$, the gas evolved at anode is
For Freundlich adsorption isotherm the graph of log x/m vs log P, the slope has a value of
If the unit of rate and rate constant are same for a reaction, the order of reaction will be
$ {CH3 -CH = CH2 ->[500^{\circ}C][Cl_2]}X. X$ is
H-bond is strongest in:
For the given energy profile diagram, rate determining step is
Carbolic acid is
$9.2\, g\, N_2O_4$ is heated in a $1L$ vessel till equilibrium state is established $N_2O_{4(g)} {<=>}2NO_{2(g)}$ In equilibrium state $50\% N_2O_4$ was dissociated, equilibrium constant will be (mol. wt. of $N_2O_4 = 92$)
In which of the following nuclear reaction X and Y are isotopes?
Aspirin is chemically:
Sequence of bond length of the following is A. ethane B. ethene C. ethyne
$CH_3CH_2Cl$ undergoes homolytic fission produces
Which of the following is second most electronegative element?
Which of the following has lowest ionisation energy?
Paraldehyde is formed by the polymerisation of
Which of the following is most basic?
Blood cells do not shrink in blood because blood is
Which of the following will not give iodoform test?
Surface hardening of steel, called nitriding i.e., heating it in the environment of
The expression $K_h = \frac{K_w}{K_a \times K_h}$ is valid for the hydrolysis of this salt
Iodine readily dissolves in $KI$ forming
An unknown alcohol is treated with the Lucas reagent to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism?
$H_{3}PO_{3}$ is:
$ { C6H5CH3 ->[ {CrO_2Cl_2}] Z}$ In the given sequence Z is:
Given: $\text{C} \left(\text{graphite}\right) + \left(\text{O}\right)_{2} \left(\text{g}\right) \rightarrow \left(\text{CO}\right)_{2} \left(\text{g}\right) \, ; \left(\text{?}\right)_{\text{r}} \left(\text{H}\right)^{\text{o}} = - 393.5 \left(\text{ kJ mol}\right)^{- 1}$ $\left(\text{H}\right)_{2}\left(\text{g}\right)+\frac{1}{2}\left(\text{O}\right)_{2}\left(\text{g}\right) \rightarrow \left(\text{H}\right)_{2}\text{O}\left(\text{l}\right);\left(\text{?}\right)_{\text{r}}\left(\text{H}\right)^{\text{o}}=-285.8 \, \text{k}\text{J} \, \text{m}\text{o}\left(\text{l}\right)^{- 1}$ $\text{C}\left(\text{O}\right)_{2}\left(\text{g}\right)+2\left(\text{H}\right)_{2}\text{O}\left(\text{l}\right) \rightarrow \text{C}\left(\text{H}\right)_{4}\left(\text{g}\right)+2\left(\text{O}\right)_{2}\left(\text{g}\right);\left(\text{?}\right)_{\text{r}}\left(\text{H}\right)^{\text{o}}=+890.3 \, \text{k}\text{J} \, \text{m}\text{o}\left(\text{l}\right)^{- 1}$ Based on the above thermochemical equations, the value of $\text{?}_{\text{r}}\text{H}^{\text{o}}$ at $\text{298 K}$ for the reaction $\text{C}\left(\text{g} \text{r} \text{a} \text{p} \text{h} \text{i} \text{t} \text{e}\right)+2\left(\text{H}\right)_{2}\left(\text{g}\right) \rightarrow \text{C}\left(\text{H}\right)_{4}\left(\text{g}\right)$ will be: