List of top Chemistry Questions

IUPAC name of the compound [Cr(H\(_2\)O)\(_3\)(NH\(_3\))\(_3\)]Cl\(_3\)
Preparation of KMnO\(_4\) from Mg(II):
The pKa value of a 0.1 M solution of a weak acid HA with pH = 4 is:
In which of the following \( K_c = K_p \)? a) \( \text{PCl}_5(g) \rightleftharpoons \text{PCl}_3(g) + \text{Cl}_2(g) \) b) \( \text{H}_2(g) + \text{I}_2(g) \rightleftharpoons 2\text{HI}(g) \)
Name of the reaction in which benzoyl chloride is converted to benzaldehyde is
Molecule with 2\( \sigma \) and 2\( \pi \) bonds:
Find the \( \Delta G \) during the reaction: \[ \text{H}_2\text{O}(l) \rightleftharpoons \text{H}_2\text{O}(g) \quad \Delta S = +1 \, \text{kJ/mol} \, \text{at} \, 100^\circ C \]
Pressure of pure benzene is 0.75. When 0.2g of a non-volatile solute is added to 39g of benzene, pressure changes to 0.745. The molar mass of solute is?
Which of the following is an ambidentate ligand? a) \( \text{C}_2 \text{O}_4^{2-} \) b) \( \text{CN}^- \) c) \( \text{NH}_3 \)
Maximum magnetic moment shown by:
10 g of (90 percent pure) \( \text{CaCO}_3 \), treated with excess of HCl, gives what mass of \( \text{CO}_2 \)?
Alkali metal with highest first ionization enthalpy is:
\( E^\circ_{\text{Cell}} = 1.1 \, \text{V}. \, \text{Find} \, E_{\text{Cell}} \, \text{for the reaction:} \, \text{Zn} + \text{Cu}^{2+} \, (0.1M) \rightleftharpoons \text{Zn}^{2+} \, (0.001M) + \text{Cu} \)
A first-order reaction is 75 percent completed in 6000s. What is the half-life?
Number of valence electrons in Germanium?
Which of the following contains 2 primary –OH groups in its structure?
Friedel Craft's reaction is an example of:
The most basic oxide
Benzene when treated with Br\(_2\) in the presence of FeBr\(_3\), gives 1,4-dibromobenzene and 1,2-dibromobenzene. Which type of reaction is this?
Given the following concentrations and rates, which one corresponds to the rate law for the reaction? \[ [A] = 0.10 \quad [D] = 0.2 \quad \text{Rate} = 0.2 \] \[ [A] = 0.2 \quad [D] = 0.2 \quad \text{Rate} = 0.4 \] \[ [A] = 0.10 \quad [D] = 0.1 \quad \text{Rate} = 0.05 \]
Fehling's solution is a mixture of:
Find the rate constant at 310K if the initial concentration is 0.72 mol L$^{-1}$ and the final concentration is 1.44 mol L$^{-1}$ at 10 minutes.
When toluene is treated with chromium oxide and acetic anhydride, followed by hydrolysis, what is the product formed?
Which of the following is the set of neutral oxides? (a) \( \text{Al}_2\text{O}_3, \text{Cl}_2\text{O}_7 \), b) \( \text{N}_2\text{O}, \text{CO} \)
What is the formula of lanthanoids with sulfur?