List of top Chemistry Questions

In which of the following reactions, standard entropy change $(\Delta S^{\circ})$ is positive and standard Gibb?s energy change $(\Delta G^{\circ})$ decreases sharply with increasing temperature ?
Which alkene on ozonolysis gives \(CH_3CH_2CHO\) and
In which case the $NO_2$ will attack at the meta position
An ideal gas can?t be liquefied because
Bond enthalpies of $H_2, X_2$ and $HX$ are in the ratio $2 : 1 : 2$. If enthalpy of formation of $HX$ is $-50 \,kJ \,mol^{-1}$, the bond enthalpy of $H_2$ is
Which of the following combinations would not result in the formation of a buffer solution?
In the reaction $3 Br _{2}+6 CO _{3}^{2-}+3 H _{2} O \longrightarrow 5 Br ^{-}+ BrO _{3}^{-}+6 HCO _{3}^{-}$
Formation of ozone in the upper atmosphere from oxygen takes place by the action of
The van�t Hoff factor $i$ for an electrolyte which undergoes dissociation and association in solvents are respectively
When chlorine water is exposed to sunlight, $O_2$ is liberated. Hence,
$0.45 \,g$ of acid molecular weight $90$ is neutralised by $20\, ml$ of $0.5\,N$ caustic potash. The basicity of acid is
Which has the maximum number of molecules among the following ?
What is the value of electron gain enthalpy of $Na^+$ if $IE_1$ of $Na = 5.1 \,eV$ ?
Match List I (Equations) with List II (Types of process) and select the correct option.
Complete hydrolysis of cellulose gives
The formation of salicylaldehyde with phenol and chloroform in the presence of NaOH at 340 K and then hydrolysis is called
Which has the highest pH?
Identify the wrong statement in the following :
Identify the wrong statement in the following.
$58.4\, gm$ of $NaCl$ and $180\,gm$ of glucose were separately dissolved in $1000 \,mL$ of water. Identify the correct statement regarding the elevation of boiling point ($b.pt$) of the resulting solutions.
Bond order of $1.5$ is shown by:
Equal volumes of two monoatomic gases, A and B, at same temperature and pressure are mixed. The ratio of specific heats $(C_p/C_v)$ of the mixture will be -
Given the reaction between 2 gases represented by $A_2$ and $B_2$ to give the compound ${AB_{(g)}}$. ${ A_{2(g)} + B_{2(g)} <=> 2 \, AB_{(g)}}$ At equilibrium, the concentration of ${A_2 = 3.0 \times 10^{-3} \, M}$ of ${B_2 = 4.2 \times 10^{-3}\, M }$ of ${AB = 2.8 \times 10^{-3} \, M}$ If the reaction takes place in a sealed vessel at $527^{\circ} C$, then the value of $K_C$ will be :
The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (D) is
The pair of species with the same bond order is