List of top Chemistry Questions

Find the mass of an organic compound of molar mass 84, required to prepare 250 ml solution of molarity 0.4

Which among the following has least \( \text{p}K_b \) value?

Find the order of metallic radius of
Mg, Li, Be, B, Al

Find difference in work function of two different metal if their stopping potential are 0.4V and 1.6V respectively.(metals are illuminated with photons of same energy)

What is the ration of Debroglie wavemength of proton and neutron if kinetic energy is same for both

A 250W bulb emit light of wavelength 19.6nm. Find the no of electron emitted per second

Calculate the osmotic pressure of \(0.1\,M\) glucose at \(27^\circ C\).

Find the work done by a gas that expands from \(0.2\,\text{dm}^3\) to \(0.8\,\text{dm}^3\) against a constant pressure of \(2\) bar.

The correct increasing order of the acid strength of benzoic acid (I), 4-nitrobenzoic acid (II), 3,4-dinitrobenzoic acid (III) and 4-methoxybenzoic acid (IV) is

X and Y in the below reaction are ______ and ______ respectively

C\(_6\)H\(_5\)–CO\(_2\)H + X \(\xrightarrow{\text{Heat}}\) C\(_6\)H\(_5\)–COCl \(\xrightarrow{\text{H}_2/\text{Pd/BaSO}_4\text{, Quinoline}}\) Y

Reaction of butanone with methylmagnesium bromide followed by hydrolysis gives:

The reagent ‘R’ in the given sequence of chemical reaction is:
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Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of:

The de Broglie wavelength associated with an electron accelerated by a potential of 64 V is ____.

Arrange the following amines in the decreasing order of their basic strength : Aniline (I), Benzylamine (II), p-toluidine (III)

Correct order of acidic strength:

One mole of an alkene on ozonolysis gives a mixture of one mole pentan-3-one and one mole methanal. The alkene is (2024)

CH₃CH₂Br → (aq. KOH) → A → (PCl₅) → B
Final product B:

The correct sequence of bond enthalpy of ‘C–X’ bond is:

From the following pairs of ions which one is not an iso-electronic pair?

Enthalpy of combustion of benzene, graphite, dihydrogen are \( -3260 \), \( -390 \) and \( -290\text{ kJ/mol} \). Find the enthalpy of formation of benzene

Volume ofmethanol to make 2L of 0.4M solution
\( (\text{density} = 0.64\text{KgL}^{-1}, \text{ MM} = 32\text{ g mol}^{-1}) \)

Metals used in preparation of dihydrogen in lab

Which are carcinogenic hydrocarbon
(i) 1,2 - Benzanthracene
(ii) pent-1-yne
(iii) 1,2 - Benpyrene
(iv) cyclohexane
(v) 3-methyl cholanthrene

IUPAC name of
\( \text{CH}_3 - \text{CH}(\text{OH}) - \text{CH}_2 - \text{CH}(\text{OH}) - \text{CH}(\text{C}_2\text{H}_5) \)
\( | \)
\( \text{CH}_3 - \text{CH}_2 \)