List of top Chemistry Questions

For the given reaction, \[ H_2(g) + Cl_2(g) \rightleftharpoons 2HCl(aq) + 2ClT(aq); \, \Delta G = -262kJ \] The value of free energy of formation (\( \Delta G_f \)) for the ion C\( T_1 \) is
Acid catalysed hydration of alkene is an example for
The antibiotics have no effect on viruses because
The boiling point of alkyl halide are higher than those of corresponding alkanes because of
Some salts containing two different metallic elements give test for only one of them in solution, such salts are
Laughing gas is
Graphite is a
What is the correct increasing order of Bronsted bases?
Which one the following removes temporary hardness of water ?
The metal present in vitamin $B_{12}$ is
The number of elements present in the $d$-block of the periodic table is
Which of the following reactions is used to prepare isobutane ?
Consider the water gas equilibrium reaction, $C ( s )+ H _{2} O ( g ) \rightleftharpoons CO ( g )+ H _{2}( g )$ Which of the following statements is true at equilibrium?
Point out incorrect stability order
The molarity of $NO_3^-$ in the solution after $2L$ of $3M \, AgNO_3$ is mixed with $3L$ of $1M \, BaCl_2$ is
Caffeine has a molecular weight of $194\, u$. If it contains $28.9\%$ by mass of nitrogen, number of atom of nitrogen in one molecule of caffeine is
In benzene, the triple bond consists of
The chemical composition of slag formed during the smelting process in the extraction of copper is
$X Cl _{2}( excess )+Y Cl _{2} X Cl _{4}+Y \downarrow$ $Y O {->[{\Delta}][{>400^{\circ} C }]} \frac{1}{2} O _{2}+Y$ Ore of Y would be ,
If the ionisation energy and electron affinity of an element are $275$ and $86 \,kcal\, mol^{-1}$ respectively, then the electronegativity of the element on the Mulliken scale is
Consider the following changes $M(s) \longrightarrow M(g)$ $M(g) \longrightarrow M^{2+}(g)+2 e^{-}\ldots$(1) $M(g) \longrightarrow M^{+}(g)+e^{-}\ldots$(2) $M^{+}(g) \longrightarrow M^{2+}(g)+e^{-} \ldots$ (3) $M(g) \longrightarrow M^{2+}(g)+2 e^{-}\ldots$(4) The second ionisation energy of $M$ could be determined from the energy values associated with
With excess of water, both $P_{2}O_{5}$ and $PCl_{5}$ give
Which one of the following is a case of negative adsorption?
A certain metal when irradiated by light $(r = 3.2 \times 10^{16} Hz)$ emits photoelectrons with twice kinetic energy as did photoelectrons when the same metal is irradiated by light $(r =2.0 \times 10^{16} Hz)$. The $v_0$ of metal is
An alloy of copper, silver and gold is found to have copper atom constituting the ccp lattice. If silver atom occupy the edge centres and gold atom is present at body centred, the alloy has a formula