List of top Chemistry Questions

In which of the following cases does manganese have a +7 oxidation state?
Common oxidation state of Cr?
What is the IUPAC name of phenyl isopentylether?
Among the following, which one is incorrect? \[ \text{BrF}_5 \rightarrow \text{Trigonal bipyramidal}, \quad \text{SF}_4 \rightarrow \text{See saw}, \quad \text{NH}_3 \rightarrow \text{Pyramidal}, \quad \text{XeF}_4 \rightarrow \text{Square planar} \]
Arrange in the order of dipole moment: \[ \text{NH}_3, \, \text{NF}_3, \, \text{H}_2\text{S}, \, \text{CHCl}_2 \]
Initial concentration of a reaction is \( 1.68 \times 10^{-2} \) and after 10 minutes concentration becomes \( 0.84 \times 10^{-2} \). Then the rate of concentration in minutes is:
Find the pH of the solution if \( [\text{H}^+] = 2 \times 10^{-4} \, \text{mol/L} \).
Which of the following bond enthalpies is the least: \[ C = C, C = O, C \equiv N, C = N \]
What is the de Broglie wavelength of the particle having kinetic energy of $ 2E $?
Ethyl alcohol on reaction with $ H_2SO_4 $ at 413 K gives:
Find the half-life of a first order reaction if $ K = 2.31 \times 10^5 \, \text{s}^{-1} $.
Formula of chromium ore?
Which has a higher boiling point ?
Which complex has dsp$^2$ hybridisation?
Which of the following are neutral?
What is incorrect for Bond order?
Write the product of the reaction: $ \text{CH}_3 \text{CH}_2 \text{CH}_2 \text{O} \text{Na} + \text{C}_6 \text{H}_5 \text{Br} \to ? $
Find the log $ K $ value, if $ \Delta G = -11.4 $ and $ 2.303 \cdot RT = 5.7 \times 10^1 $.
Bromomethane on reaction with Na and dry ether gives:
What is the hydration enthalpy of sucrose?
Phenol is treated with conc. $ H_2SO_4 $, and then with conc. $ HNO_3 $. The compound A and B are formed.
Entropy decreases in which of the following reactions? $ \text{(A) } \text{Br}_2 (l) \to \text{Br}_2 (g) $ $ \text{(B) } \text{Br}_2 (g) \to \text{Br}_2 (l) $ $ \text{(C) } \text{Br}_2 (l) \to \text{Br}_2 (g) \text{ and } \text{Br}_2 (g) \to \text{Br}_2 (l) $
In which reaction is Benzyl chloride converted to Benzaldehyde?
IUPAC name of allyl amine?
Ethanol is made unfit for drinking by adding?