List of top Chemistry Questions

Which of the following series of transition elements has general electronic configuration, \([\text{Kr}]\,4d^{1-10}\,5s^{0-2}\)?
The equation for the rate constant is \(k = Ae^{-E_a/RT}\).
A chemical reaction will proceed more rapidly if there is a decrease in
What mass of silver (Atomic mass = 108 g/mol) deposited by a quantity of electricity which displaces 5600 mL of \(\text{O}_2\) at STP ?
What type of solution is a brass ?
Which of the following reactions takes place at anode during the electrolysis of molten NaCl?
18 g of glucose (molar mass = 180 g/mol) is dissolved in water to prepare 500 ml solution at \(15^{\circ}\text{C}\). Calculate the osmotic pressure of the solution. [\(R = 0.0821 \text{L atm K}^{-1} \text{mol}^{-1}\)]
The rate law for the reaction \(A+B\rightarrow P\) is found to be rate \(= k[A]^2[B]\).
The rate constant of the reaction at 300 K is \(6.0 \text{M}^{-2}\text{s}^{-1}\). Calculate the rate of the reaction when \([A] = 1 \text{M}\) and \([B] = 0.2 \text{M}\)
The normal boiling point of Ethyl acetate is \(77^{\circ}\text{C}\). A solution of non-volatile non-electrolyte solute in ethyl acetate boils at \(78^{\circ}\text{C}\). \(K_b\) for ethyl acetate is \(2.77 ^{\circ}\text{C kg mol}^{-1}\). What is the molality of the solution ?
Identify the catalyst used in the Friedel crafts acylation reaction.
Identify the use of Baeyer's reagent by the following.
What is the coordination number of Ag in a crystal lattice?
When silver crystallizes, it forms face centered cubic cells, if the volume of unit cells \(6.84\times 10^{-23} \text{cm}^3\). Calculate the density of silver. (Molar mass of silver is 108 g/mol, \(N_A = 6.022\times 10^{23}\))
What is the total contribution of all corner particles in bcc unit cell?
Which of following has the highest nucleophilicity ?
What is oxidation state of chlorine in chlorous acid?
Identify from the following salts an example of a salt of strong acid and weak base.
Which of the following phenomena represents oxidation?
What is the role of glycerol in the decomposition of hydrogen peroxide?
Which of the following statements is NOT correct regarding dihydrogen?
The heat of combustion of carbon to \(\text{CO}_2\) is \(-393.5 \text{kJ/mol}\). The heat released upon formation of 35.2 g of \(\text{CO}_2\) from carbon and oxygen gas is
The solubility product of sparingly soluble salt BA is \(4\times 10^{-13}\). Calculate the \([\text{A}^-]\) if \([\text{B}^+]\) is \(1\times 10^{-6} \text{M}\).
Which of the following salt undergoes anionic hydrolysis ?
Calculate the enthalpy change when 6 g. \(\text{CO(g)}\) reacts with sufficient \(\text{NO}_2\text{(g)}\) according to the following reaction
\(4\,\text{CO(g)}+2\,\text{NO}_2\text{(g)}\rightarrow 4\,\text{CO}_2\text{(g)}+2\text{N}_2\text{(g)}\,; \Delta _rH^0 = -1200 \text{kJ}\)
Identify the process that proceeds with no heat exchange between system and surrounding.
Identify the most electronegative element by the following.