List of top Chemistry Questions

If $V$ is the volume of one molecule of gas under given conditions, the van der Waal?s constant $b$ is
The rate constant of a reaction is $1.5 \times 10^{-3}$ at $25^{\circ} C$ and $2.1 \times 10^{-2}$ at $60^{\circ} C$. The activation energy is
For the reaction taking place at certain temperature ${NH_2 COONH_4 (s) <=> 2NH_3 (g) + CO_2 (g) }$, if equilibrium pressure is 3X bar then $ \Delta_G$ would be
Which of the following is strongest nucleophile
Which of the following is the correct and increasing order of lone pair of electrons on the central atom?
The pH of $0.1\, M$ solution of the following salts increases in the order :
Following are colours shown by some alkaline earth metals in flame test. Which of the following are not correctly matched?
Amongst the elements with following electronic configurations, which one of them may have the highest ionization energy?
Chloroform, $CHCl _{3}$, boils at $61.7^{\circ} C$. If the $K_{b}$ for chloroform is $3.63^{\circ} C / molal$, what is the boiling point of a solution of $15.0\, kg$ of $CHCl _{3}$ and $0.616\, kg$ of acenaphthalene, $C _{12} H _{10}$ ?
If the Planck?s constant $h = 6.6 \times 10^{-34} \, Js$, the de Broglie wavelength of a particle having momentum of $3.3 \times 10^{-24} \, kg \, ms^{-1}$ will be
How many $\sigma$ bonds and $\pi$ bonds are present in
pH of a $0.1\, M$ monobasic acid is found to be $2$. Hence, its osmotic pressure at a given temperature $TK$ is
Consider the reactions (A) $H _{2} O _{2}+2 HI \longrightarrow I _{2}+2 H _{2} O$ (B) $HOCl + H _{2} O _{2} \longrightarrow H _{3} O ^{+}+ Cl ^{-}+ O _{2}$ Which of the following statements is correct about $H _{2} O _{2}$ with reference to these reactions? Hydrogen peroxide is ____
Given that the equilibrium constant for the reaction $ {2SO2(g) + O2(g) <=> 2SO3(g)}$ has a value of278 at a particular temperature. What is the value of the equilibrium constant for the following reaction at the same temperature? $ {SO3(g) <=> SO2(g) + \frac{1}{2} O2(g)}$
If osmotic pressure of 4% (w/v) solution of sucrose is same as 2% (w/v) solution of 'X' find molecular mass of X.
The mass of a non-volatile, non-electrolyte solute (molar mass $= 50\, g\, mol^{-1}$) needed to be dissolved in $114\, g$ octane to reduce its vapour pressure to $75\%,$ is :
For $1$ molal aqueous solution of the following compounds, which one will show the highest freezing point ?
The trans-alkenes are formed by the reduction of alkynes with :
Given that, for the reaction,
\(\frac 12H_2+\frac 12Cl_2→HCl\)
△Hf (HCI) = -93 kJ/mol, B.E(H2) = 434 kJ/mol, B.E(Cl2) = 242 kJ/mol
The bond dissociation energy of HCl is
What is the name of six membered cyclic structure of glucose?
Hydrolysis of diazonium salt produces
In the reaction shown below, the major product formed is
Acetic anhydride
Aniline is a resonance hybrid of five structures and where do you find the maximum electron density in those structures?
Thermoplastic can be reused because of?
Which of the following amino acid is achiral?