List of top Chemistry Questions

What is the total number of transition series of d-block elements?

Which from following anions has greater power for coagulation of positive sol?

Which of the following net cell reactions occurs in a galvanic cell containing cadmium electrode and standard hydrogen electrode?
\(\text{E}_{(\text{Cd}_{(aq)}^{2+}|\text{Cd}_{(s)})}^{\circ} = -0.403 \text{V}\).

In a first order reaction 20 millimole of reactant is lowered to 10 millimole in \(0.3010\) minute. Find rate constant of the reaction?

For the reaction \(2\text{NOBr}_{(g)}⟶2\text{NO}_{(g)}+\text{Br}_{2(g)}\), rate law is \(r = k[\text{NOBr}]^2\). Rate constant is \(1.62 \text{M s}^{-1}\) and concentration of NOBr is \(5\times 10^{-3} \text{M}\),
What is rate of reaction?

For a certain redox reaction in galvanic cell \(\text{X}_{(s)}+\text{Y}_{(aq)}^{2+}⟶\text{X}_{(aq)}^{2+}+\text{Y}_{(s)}\), \(\text{E}^{\circ}\) cell is \(0.0296 \text{V}\) at \(298 \text{K}\). What is equilibrium constant of reaction?

Which of the following reactions has of overall order \(1.5\) ?

Calculate the molality of solution of nonvolatile solute if boiling point of solution, molal elevation constant for solvent are \(319.8 \text{K}\) and \(2.5 \text{K kg mol}^{-1}\) respectively [Boiling point of solvent = \(319.5 \text{K}\)]

Calculate the number of atoms present in \(1 \text{g}\) metal that forms simple unit cell structure if product of density and volume of unit cell is \(66.5\times 10^{-24} \text{g}\)

Calculate the void volume in fcc unit cell if total volume of a unit cell is \(6.4\times 10^{-23} \text{cm}^3\) ?

Which of the following alkyl chlorides on Wurtz reaction gives 2, 2, 5, 5- tetramethylhexane ?

\(40\) gram nonelectrolyte solute having molar mass \(180 \text{g mol}^{-1}\) dissolved in water has osmotic pressure \(2 \text{atm}\) at \(300 \text{K}\). Calculate the volume of solution. (\(\text{R} = 0.0821 \text{atm mol}^{-1}\text{K}^{-1}\))

What is the total number of Bravais lattices in orthorhombic crystal system?

Identify the conjugate bases of \(\text{H}_3\text{PO}_3\) and \(\text{H}_2\text{SO}_4\) respectively from following.

What is the formula of Tin (IV) oxide?

What is the of number of chiral carbon atoms present in 2-Bromo-3,4,5-trimethylhexane ?

What happens in the oxidation number of Mn during working of dry cell.

Identify the name of second higher homologue of formic acid?

For a certain reaction, \(\Delta \text{H}^{\circ} = 40 \text{kJ}\) and \(\Delta \text{S}^{\circ} = 80 \text{JK}^{-1}\). Find the temperature so that \(\Delta \text{G}^{\circ} = 0\)

What is the molarity of \(\text{H}_2\text{SO}_4\) solution having \(\text{pH} = 4\) ?

Which of the following is Lewis acid?

The solubility of a sparingly soluble a salt \(\text{AB}_2\) is \(1\times 10^{-6} \text{mol/dm}^3\). Calculate its solubility product?

Calculate \(\Delta \text{H}\) for the following reaction at \(300 \text{K}\)
\(2\text{C}_{(s)}+3\text{H}_{2(g)}⟶\text{C}_2\text{H}_{6(g)}\) if \(\Delta \text{U}\) for the reaction is \(-80 \text{kJ}\) (\(\text{R} = 8.314 \text{JK}^{-1}\text{mol}^{-1}\))

Which from following is correct expression of first law of thermodynamics for isothermal process?

What ratio by mass of 'Ne' and \(\text{CH}_4\) should be mixed so that partial pressure exerted by each gas is same?