List of top Chemistry Questions

Which of the following structure is similar to graphite ?

Reaction by which Benzaldehyde cannot be prepared

Dipole-induced dipole interactions are present in which of the following pairs ?

A magnetic moment of 1.73 BM will be shown by one among the following

Which is the strongest acid in the following ?

Roasting of sulphides gives the gas X as a by-product. This is a colorless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic acts as a reducing agent and its acid has never been isolated. The gas X is

The number of carbon atoms per unit cell of diamond unit cell is

A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm^-3. The molar mass of the metal is
(N_A Avogadro's constant = 6.02 × 10²³ mol^-1)

Maximum deviation from ideal gas is expected from

How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO₃? The concentrated acid is 70% HNO₃.

Based on equation E = -2.178 x 10^-18 J\((\frac{Z^2}{n^2})\) certain conclusions are written. Which of them is not correct ?

A button cell used in watches functions as following
Zn(s) + Ag₂O(s) + H₂O(l) ⇌ 2Ag(s) + Zn²⁺ (aq) + 20H^- (aq)
If half cell potentials are
Zn²⁺(aq) + 2e^- → Zn(s); E° = -0.76 V
Ag₂O(s) + H₂O(l) + 2e^- → 2Ag(s) + 20H^-(aq),
E° = 0.34 V
The cell potential will be

Some reactions of amines are given. Which one is not correct ?

The anion of acetylacetone (acac) forms $Co (acac)_3$ chelate with $Co^{3+}$. The rings of the chelate are :

Crystal field stabilisation energy for high spin $d^4$ octahedral complex is

$6.02 \times 10^{20}$ molecules of urea are present in 100 mL of its solution. The concentration of solution is :-

A reaction having equal energies of activation for forward and reverse reactions has :-

Consider the half-cell reduction reaction :- $Mn^{2+}+2e^{-}\to Mn, E^{0}=-1.18 V$ $Mn^{2+}\to Mn^{3+}+e^{-}, E^{0}=-1.51 V$ The $E^\circ$ for the reaction $3 Mn^{2+}\to Mn^{0}+2Mn^{3+}$ and possibility of the forward reaction are respectively :

$C _{6} H _{5} COCl \xrightarrow{ NH _{3}} X \xrightarrow{ P _{2} O _{5}} Y \xrightarrow [H_2]{ Ni }Z$ The end product in the above sequence of reaction is

The mass of $112 \, cm^3$ of $NH_3$ gas at $STP$ is

Which one of the following gives amine on heating with amide ?

Which of the following gases has the highest value of $rms$ velocity at $298\, K$?

The ionisation energy of an electron in the ground state of helium atom is $24.6\, eV$. The energy required to remove both the electron is

Which of the following pairs are correctly matched? Reactants Products I. $Rx+AgOH (aq)$ RH II. $Rx+AgCN_{(alc)}$ RNC III. $Rx+KCN_{(alc)}$ RNC IV. $Rx+Na_{\text{(ether)}}$ R-R

Arrange the following in increasing order of stability:- $\left(a\right) \left(CH_{3}\right)_{2}C^{^{\oplus}}-CH_{2}-CH_{3} \quad\left(b\right) \left(CH_{3}\right)_{3}C^{^{\oplus}}$ $\left(c\right) \left(CH_{3}\right)_{2}C^{^{\oplus}}H \quad\quad\quad\quad\quad\quad\quad\left(d\right) CH_{3} C^{^{\oplus}}H_{2}$ $\left(e\right)C^{^{\oplus}}H_{3}$