List of top Chemistry Questions

The IUPAC name of
The relative Lewis acid character of boron trihalides is the order
\(\mathrm{KO}_2\) is used in space and submarines because it
Which of the following is false about \(\mathrm{H}_2\mathrm{O}_2\)?
Equivalent amounts of \(\mathrm{H}_2\) and \(\mathrm{I}_2\) are heated in a closed vessel till equilibrium is obtained. If \(80%\) of the hydrogen can be converted to \(\mathrm{HI}\), the \(K_C\) at this temperature is
The enthalpy of combustion of carbon and carbon monoxide are \(-393.5\) and \(-283\mathrm{kJ / mol}\) respectively. The enthalpy of formation of carbon monoxide per mole is
Under which of the following condition, van der Waals' gas approaches ideal behaviour?
The
bond angle in \(\mathrm{H}_2\mathrm{O}\) is \(104.5^{\circ}\). This fact can be explained with the help of
In which of the following arrangement the order is not according to the property indicated against it?
The ionisation energy of hydrogen atom is \(13.6\mathrm{eV}\). What will be the ionisation energy of He\(^+\)?
How many moles of \(\mathrm{Al}_2(\mathrm{SO}_4)_3\) would be in \(50\mathrm{g}\) of the substance?
A mixture of gases contains $H_2$ and $O_2$ gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the two gases in the mixture?
Which of the following pairs of ions are isoelectronic and isostructural ?
Which of the following options represents the correct bond order ?
A device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as
A gas such as carbon monoxide would be most likely to obey the ideal gas law at :
Aqueous solution of which of the following compounds is the best conductor of electric current?
Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at $25^{\circ } C$?
If avogadro number $N_A$, is changed from ${6.022 \times 10^{23} \, mol^{-1} }$ to ${6.022 \times 10^{20} \, mol^{-1} }$ , this would change :
If the equilibrium constant for ${ N2(g) + O2(g) <=> 2NO(g)}$ is K, the equilibrium constant for ${ \frac{1}{2} N_2 (g) + \frac{1}{2} O_2 (g) <=> NO(g) }$ will be :
In an $S_N1$ reaction on chiral centres, there is :
Rachel Carson's famous book 'Silent Spring ' is related to
Reaction of carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is :
Solubility of the alkaline earth?? metal sulphates in water decreases in the sequence :
The angular momentum of electron in 'd' orbtial is equal to