List of top Chemistry Questions

The reagent(s) which can be used to distinguish acetophenone from benzophenone is (are):
For which of the following systems at equilibrium, at constant temperature, will the doubling of the volume cause a shift to the right?
The chirality of the compound:
For the process \( H_2O(g) \, (1 \, \text{bar}, 373 \, \text{K}) \rightarrow H_2O(g) \, (1 \, \text{bar}, 373 \, \text{K}) \), the correct set of thermodynamic parameters is:
Which of the following compounds is formed when a mixture of \( K_2Cr_2O_7 \) and NaCl is heated with conc. \( H_2SO_4 \)?
Ionisation energy of \( \text{He}^+ \) is \( 19.6 \times 10^{-18} \, \text{J} \, \text{atom}^{-1} \). The energy of the first stationary state (n = 1) of \( \text{Li}^{2+} \) is:
Stomach acid has a pH of approximately 2. Sour milk has a pH of 6. Stomach acid is
When the following 1.0 mol dm\(^{-3}\) aqueous solutions are arranged in order of increasing pH, which is the correct order?

I. Ammonium chloride
II. Ammonium ethanoate
III. Sodium ethanoate
Argon crystallises in fcc arrangement and the density of solid and liquid Ar is 1.59 g/cm\(^3\) and 1.42 g/cm\(^3\), respectively. The percentage of empty space in liquid Ar is
Tincture of iodine has antiseptic properties. This solution is made by dissolving :
Vinegar, used in kitchen is a dilute solution of :

Which of the following electronic configuration is not possible ?

Metal, which will displace hydrogen from dilute HCl is :
Beryllium gives a compound X with the following percentage composition: Be = 6.1%, N = 37.8%, Cl = 48%, H = 8.1%. The molecular weight of X is 148 g/mol and that of Be is 9 g/mol. The molecular formula of the compound is:
The bond dissociation energies of X2 , Y2 and XY are in the ratio of 1 : 0·5 : 1. ΔH for the formation of XY is – 200 kJ mol–1 . The bond dissociation energy of X2 will be
Which of the following has maximum number of atoms ?
Isotopes of an element have :
The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion ?
The number of electrons in an element X is 6 and the number of neutron is 8. Which of the following is the correct representation of the element ?
How many $\sigma$ bonds and $\pi$ bonds are present in
For the reaction taking place at certain temperature ${NH_2 COONH_4 (s) <=> 2NH_3 (g) + CO_2 (g) }$, if equilibrium pressure is 3X bar then $ \Delta_G$ would be
Beryllium shows diagonal relationship with aluminium. Which of the following similarity is incorrect ?
Chloroform, $CHCl _{3}$, boils at $61.7^{\circ} C$. If the $K_{b}$ for chloroform is $3.63^{\circ} C / molal$, what is the boiling point of a solution of $15.0\, kg$ of $CHCl _{3}$ and $0.616\, kg$ of acenaphthalene, $C _{12} H _{10}$ ?
If $V$ is the volume of one molecule of gas under given conditions, the van der Waal?s constant $b$ is
The pH of $0.1\, M$ solution of the following salts increases in the order :