List of top Chemistry Questions

The pH of 0.5 L of 1.0 M NaCl solution after electrolysis for 965 s using 5.0 A current is:
Calculate the molarity of a solution containing 5 g of NaOH dissolved in the product of H$_2$ – O$_2$ fuel cell operated at 1 A current for 595.1 hours.(Assume F = 96500C/mol of electron and molecular weight of NaOH as 40 g/mol).
When the same quantity of electricity is passed through the aqueous solutions of the given electrolytes for the same amount of time, which metal will be deposited in maximum amount on the cathode?

For the reaction: 2SO2 + O2 → 2SO3,
the rate of disappearance of O2 is \( 2 \times 10^{-4} \, \text{mol L}^{-1} \text{s}^{-1} \).
What is the rate of appearance of SO3?

If for a first-order reaction, the value of \( A = 4 \times 10^{13} \, \text{s}^{-1} \) and \( E_a = 98.6 \, \text{kJ mol}^{-1} \), then at what temperature will its half-life be 10 minutes?

In the chemical reaction A $\rightarrow$ B, what is the order of the reaction? Given that, the rate of reaction doubles if the concentration of A is increased four times.
Calculate the activation energy of a reaction, whose rate constant doubles on raising the temperature from 300 K to 600 K.
In the reaction, A \( \rightarrow \) products, if the concentration of the reactant is doubled but the rate of reaction remains unchanged, what is the order of the reaction with respect to A?
In a first-order reaction, the concentration of the reactant decreases from 0.8 M to 0.4 M in 15 minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is:
The chemical composition of 'slag' formed during the smelting process in the extraction of copper is:
Calamine, malachite, magnetite, and cryolite, respectively, are:
In which of the following molecules, all bond lengths are not equal?
The sol formed in the following unbalanced equation is:
\[ As_2O_3 + H_2S \rightarrow {?} \]
Which of the following has least tendency to liberate H$_2$ from mineral acids?
The correct statement among the following is:
The type of isomerism present in nitropentammine chromium (III) chloride is:
Identify, from the following, the diamagnetic, tetrahedral complex:
Ferrocene is:
The chemical name of calgon is:
The metal that shows highest and maximum number of oxidation states is:

Hybridisation and geometry of [Ni(CN)$_4$]$^{2-}$ are
 

Match List I with List II. 
 

Which of the following is the correct order of ligand field strength?
The complex with the highest magnitude of crystal field splitting energy (\(\Delta_0\)) is:
IUPAC name of \( [Pt(NH_3)_2Cl(NH_2CH_3)]Cl \) is: