List of practice Questions

In Kjeldahl's method, the nitrogen present in an organic compound is quantitatively converted into

Number of photons emitted by a 100 W (Js^-1) yellow lamp in 1.0 s is
(λ of yellow light is 560 nm)

Valence electrons in the element \(X\) are 3 and that in element \(Y\) is 6. Most probable compound formed from \(X\) and \(Y\) is

An atom forms face centered cubic crystal with density d=8.92 g/mL and edge length a=3.6×10^-8 cm. The molecular mass of atom in amu is

Conversion of oxygen into ozone is non-spontaneous at

If \(Na^+\) ion is larger than \(Mg^{2+}\) ions and \(S^{2-}\) ion is larger than \(Cl^-\) ion, which of the following will be stable salt in water ?

In a crystalline sold, having formula \(XY_2O_4\), oxide ions are arranged in cubic close packed lattice while cations \(X\) are present is tetrahedral voids and cations \(Y\) are present in octahedral voids. The percentage of tetrahedral voids occupied by \(X\) is

Product P is :

Which of the following is correct statement?

Among the following, the non-aromatic heterocyclic compound is

The correct formula for plaster of Paris is

The correct order of ease of adsorption of the hydrated alkali metal ions on an ion exchange resin is

The value of Kc for the reaction, \(2A⇋B+C\) is \(2×10^{-3}\). At a given time,the composition of reaction mixture is \([A]=[B]=[C]=3×10^{-4}\ M\). In which direction, the reaction will proceed?

Which of the following chemicals are used to manufacture methyl isocyanate that caused Bhopal tragedy?
(i) Methylamine
(ii) Phosgene
(iii) Phosphine
(iv) Dimethylamine

For the following reaction,
\(2NH_3(g)+CO_2(g)⇋NH_2CONH_2(aq)+H_2O(l)\)
△G°=-13.6 kJmol^-1 at 298 K. Then log K_eq for this eq equilibrium is

In the reaction,

The major product formed is:

Lead is extracted from galena (PbS), either by following ways.

Neopentyl chloride reacts with benzene in presence of a Lewis acid \((AlCI_3)\) to form

Which one of the following represents the correct structure of cellulose?

Xenon hexafluoride reacts with silica to form a compound \(X\). The oxidation state of xenon in \(X\) is

Final product will be:

In the extraction of copper from its sulphide ore, the metal is formed by the reduction of \(Cu_2O\) with

Oxidation number of \(Cr\) in \([Cr(NH_3)_4Cl_2]^+\)

What is the formula of Marshalls acid?

Which one of the following species is paramagnetic in nature?