List of top Chemistry Questions

The correct order of decreasing acidity of the following aliphatic acids is:
A solution contains 10 g of NaOH dissolved in 500 mL of water. What is the molarity of the NaOH solution?
\( (\text{CH}_3)_3\text{CH} \xrightarrow{\text{KMnO}_4} \text{X} \xrightarrow[\text{573K}]{\text{Cu}} \text{Y} \). The number of \( sp^3 \) and \( sp^2 \) carbons in Y are respectively

The total number of structural isomers possible for the substituted benzene derivatives with the molecular formula $C_7H_{12}$ is __

Which of the following is an example of an exothermic reaction?
What volume of \( 0.5 \, \text{M} \, \text{NaOH} \) is required to neutralize \( 50 \, \text{mL} \) of \( 1 \, \text{M} \, \text{HCl} \)?
What is the pH of a solution if the concentration of \( \text{H}^+ \) ions is \( 1 \times 10^{-5} \, \text{mol/L} \)?
Energy of the incident photons on the metal surface is initially \(4 \text{ W}\) and then \(6 \text{ W}\) where \(W\) is the work function of that metal. The ratio of velocities of emitted photoelectrons is
A photosensitive surface has work function (\phi). If photon of energy (3\phi) falls on this surface, the electron comes out with maximum velocity of (4 \times 10^6 m/s). When photon energy is increased to (7\phi) then maximum velocity will be
Which of the following is trihydric phenol?
Which of the following on reaction with Grignard's reagent followed by hydrolysis forms tertiary alcohol?
For a certain reaction $\Delta H = -225$ kJ and $\Delta S = -150$ J K$^{-1}$. Find the temperature so that $\Delta G$ is zero.
What is the number of moles of 'C' and 'H' atoms respectively present in n mole molecule represented by following structure?
Identify the product obtained when nitro ethane is treated with Sn - HCl under ideal conditions.
In an ionic solid anions are arranged in hcp array and cations occupy $\frac{2}{3}$ of octahedral voids. What is the formula of ionic compound? [consider A = cation; B = anion]}
Which from following is an example of an intensive property of the system?
What is the order of reactivity of alkyl halides with ammonia?
Which of the following molecules does not obey octet rule?
What is the number of hydrogen atoms present in 5.4 g of urea?
Which among the following is haloarene?
For the reaction, $2N_2O_5(g) \rightarrow 4NO_2(g) + O_2(g)$ $N_2O_5$ disappears at a rate of $x$ moldm$^{-3}$ s$^{-1}$ Find the rate of formation of $O_2$ ?
Identify the reaction so that carbonyl group of aldehydes and ketones is reduced to methylene group on treatment with Zinc-amalgam and concentrated hydrochloric acid.
What is degree of dissociation of $CH_3COOH$ if, $\Lambda^\circ (CH_3COO^-) = 50\text{ S cm}^2\text{ mol}^{-1}$, $\Lambda^\circ (H^+) = 350\text{ S cm}^2\text{ mol}^{-1}$ and molar conductivity of $5 \times 10^{-2}\text{ M }CH_3COOH$ is $20\text{ S cm}^2\text{ mol}^{-1}$ ?
Calculate the work done in the oxidation of one mole $HCl_{(g)}$ at 27$^\circ$C, according to reaction.
$4HCl_{(g)} + O_{2(g)} \rightarrow 2Cl_{2(g)} + 2H_2O_{(g)}$
(R = 8.314 J K$^{-1}$ mol$^{-1}$)
Which of the following halogens does always show oxidation state -1 ?