The mass of particle X is four times the mass of particle Y. The velocity of particle Y is four times the velocity of X. The ratio of de Broglie wavelengths of X and Y is:
At $ T $ (K), the following data was obtained for the reaction: $ S_2O_8^{2-} + 3 I^- \rightarrow 2 SO_4^{2-} + I_3^- $.
From the data, the rate constant of the reaction (in $ M^{-1} s^{-1} $) is:
A conductivity cell is filled with a solution of KCl of concentration 0.2 mol dm\(^{-3}\) and its conductivity is 0.28 S m\(^{-1}\). The resistance of this solution is 82.2 Ω. The same cell filled with a solution of 0.0025 mol dm\(^{-3}\) K₂SO₄ showed a resistance of 325 Ω. The molar conductivity of K₂SO₄ solution (in S m² mol\(^{-1}\)) is:
The dispersed phase and dispersion medium in smoke, respectively, are:
Ethylene glycol (C\(_2\)H\(_6\)O\(_2\)) is used as an antifreeze in cars. In a certain place, it is desired that water freezes at 258K. How much weight of ethylene glycol is needed to prevent separation of ice from 500 g of water? \[ (K_f { of water} = 1.86 { K kg mol}^{-1}) \]
Which of the following, when present in higher concentrations in air, retards the rate of photosynthesis?
Which of the following forces stabilize the secondary structure of proteins? A. Hydrogen bondsB. Covalent bondsC. Disulphide linkagesD. Vander Waals forces
Malachite is a mineral of metal ‘X’. Its composition is:
0.2 g of an organic compound containing C, H, and O on complete combustion gave 0.46 g of \(CO_2\) and 0.25 g of \(H_2O\). What is the percentage of oxygen in that compound?
Match the following elements with their correct classifications:
A metal catalyst (X) is used in the catalytic converter of automobiles. This prevents the release of gas Y into the atmosphere. What are X and Y respectively?
The density of \(\beta\)-Fe is 7.6 g/cm\(^3\). It crystallizes in a cubic lattice with \( a = 290 \) pm. What is the value of \( Z \)? (\( Fe = 56 \) g/mol, \( N_A = 6.022 \times 10^{23} \) mol\(^{-1}\))
