List of top Chemistry Questions

When C6H5CHO reacts with the mixture of HNO3 and H2SO4 at 273-283K, it gives

Match the following: 

Which of the following is an outer orbital complex?
Which of the following is correct about the stability of half-filled and completely filled subshells?
(i) Relatively small shielding
(ii) Larger coulombic repulsion energy
(iii) Smaller exchange energy
(iv) Smaller coulombic repulsion energy
(v) Larger exchange energy
A solution is prepared by adding 4 g of a substance to 46 g of ethanol. What is the mass percentage of the solute?

Benzene diazonium chloride on treatment with reagent 'X' gives iodobenzene. The reagent ‘X’ is

The carbohydrates are stored in animal body as
Methyl fluoride is prepared by heating methyl bromide in the presence of AgF. This reaction is known as
An aromatic compound (X) of molecular formula, C7H7Cl, on ammonolysis gives Y (Molecular formula, C7H9N). The compound Y reacts with two moles of CH3Cl gives N, N-Dimethylphenylmethanamine. The compounds 'X' and 'Y' are
The reagent used for the conversion of carboxylic acids to primary alcohols is
Which of the following is an extensive property?
Which of the following molecules has the highest standard enthalpy change of fusion (\( \Delta_{fus}H^\circ \)) (in kJ mol\(^{-1}\))?
\(\Delta H\) and \(\Delta S\) value of a reaction which is non-spontaneous at high T and spontaneous at low T is:
N\(_2\) exerts partial pressure of 7.698 bar in 1L water at 298K. What is the mole fraction of N\(_2\) in the solution? Given that N\(_2\) = 76.48K bar.
Which has intramolecular hydrogen bonding?
Ortho nitrophenol, Para nitrophenol
In the reaction \( 3Mg + N_2 \rightarrow Mg_3N_2 \), the oxidation number of Mg changes is:
Amount of charge needed to dissociate MgClâ‚‚?
Acetanilide is prepared by reacting -------and-------.
Which one of the series of hydrogen spectrum is in the visible region?
Which of the following amino acids are synthesized in our body?
IUPAC name of the compound [Cr(H\(_2\)O)\(_3\)(NH\(_3\))\(_3\)]Cl\(_3\)
Order of acidity CH=CH, CH₃-C=CH, CH₃-C=C-CH₃?
Which shows +6 oxidation state in fluorides?
Which of the following is a non-polar molecule?
Preparation of KMnO\(_4\) from Mg(II):