List of top Chemistry Questions

In a reaction, $2A \rightarrow$ products the concentration of A decreases from $0.50 \,M$ to $0.38 \,M$ in $10 \,min$. What is the rate of the reaction (in $Ms^{-1}$) during this interval?
$Al_2(SO_4)_3$ is used in the following but not
Consider the following statements concerning $N_2H_4$ 1. It is an exothermic compound 2. It burns in air with the evolution of heat 3. It has kinetic stability 4. In reduces $Fe^{3+}$ to $Fe^{2+}$ in acidic medium Which of the following combination is correct?
In the adsorption of a gas on solid, Freundlich isotherm is obeyed. The slope of the plot is zero. Thus, the extent of adsorption is
In a first order reaction 80% of the reactant at an instant was reduced to 8% in 4606 seconds. The rate constant of the reaction is
For a first-order reaction, if the rate constant is \( k = 6.93 \times 10^{-3} \), what is the half-life (\( t_{1/2} \)) of the reaction?
If the mean kinetic energy of Helium is 5000 J at 400 K, then the kinetic energy of neon at 800 K is
CrO$_3$ is _____ oxide?

Radius order of \(Yb^{3+}, La^{3+}\), \(Ce^{3+}\), \(Pm^{3+}\)?

Increasing ionic radii of lanthanoids having +2 oxidation state?
Which of the following is not an EWG (Electron Withdrawing Group)?
Among the following four aromatic compounds, which one will have the lowest melting point?
A naturally occurring amino acid that contains only one basic functional group.
If Ksp of Ag2CO3 is 8×10−12, the molar solubility of Ag2CO3 in 0.1MAgNO3 is:
At 25∘C, the solubility product of Mg(OH)2 is 1.0×10−11. At which pH, will Mg2+ ions start precipitating in the form of Mg(OH)2 from a solution of 0.001MMg2+ ions ?

In the given reaction Product A is:

Which one of the following species will disproportionate in the following reduction potential diagra
Two particles A and B are in motion and the wavelength of A is 5 × 10-8 m. The wavelength of B, so that its momentum is double that of A, will be:
Which of the following will be oxidized by \(HIO_4\)?
Which of the following will be oxidized by HIO4
In the metal carbonyls of the general formula M(CO)x where M = metal x = 4, EAN rule is satisfied for atomic number of M equal to:
In both DNA and RNA, heterocyclic base and phosphate ester linkages are at 
Amongst the following, the most basic compound is:
The number of bridging \(CO\) ligands and \(Co-Co\) bonds in \(Co_2(CO)_8\), respectively are:
If a gas absorbs 200J of heat and expands by 500 cm3 against a constant pressure of 2×105Nm−2, then the change in internal energy is:
Hydrogen ion concentration of an aqueous solution is 1 × 10-4 M.  The solution is diluted with equal volume of water.  Hydroxyl ion concentration of the resultant solution in terms of p×10-10 mol dm-3 . What is the value of p?