Two statements are given below:I. SO₂ is used as antioxidant in wineII. BHA is used as food preservative in dry fruits
The dissociation constants of a diacid HA are \(K_{a1} = 6 \times 10^{-2}\) and \(K_{a2} = 6 \times 10^{-5}\). The pH of 0.011 M \(HA\) solution is 2.0. What is the value of \(\left[\frac{{A}^-}{{HA}}\right]\)?
The number of molecules having one lone pair of electrons on the central atom is from the following list: SnCl$_2$, XeF$_6$, SO$_3$, ClF$_3$, BrF$_5$, H$_2$O, XeO$_3$.
50 mL of 1 M HCl was completely reacted with \(x\) g of CaCO3 to form CaCl2, CO2, and H2O. What is the value of \(x\) in g?
What is Z in the following set of reactions?
Acetophenone can be prepared from which of the following reactants?
Malachite is a mineral of metal ‘X’. Its composition is:
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:
An alkyl halide C\(_4\)H\(_8\)Br(X) undergoes hydrolysis preferably in polar protic solvents. X can be prepared from which of the following reactants?
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:
Which of the following sets are not correctly matched? i. XeF₄ - sp³ii. SF₄ - sp³diii. SO₃ - sp²iv. SnCl₂ - sp
At 293 K, the density of an aqueous solution containing 120 g of urea (NH\(_2\)CONH\(_2\)) per dm\(^3\) is 1.02 kg dm\(^{-3}\). The mole fraction of urea is approximately:
Adsorption of a gas on a solid obeys the Freundlich adsorption isotherm. In the graph drawn between \(\log (x/m)\) (on the y-axis) and \(\log p\) (on the x-axis), the slope and intercept are found to be 1 and 0.3, respectively. If the initial pressure of the gas is 0.02 atm, the mass of the gas adsorbed per gram of solid is (\({antilog } 0.3 = 2\)).
At 500 K, for the reaction \[ {PCl}_5(g) \leftrightarrow {PCl}_3(g) + {Cl}_2(g) \] the equilibrium constant \( K_c \) is 1.8 mol/L. What is \( K_p \) in atm at the same temperature? \[ R = 0.082 { L atm mol}^{-1} {K}^{-1} \]
Which of the following can act as Lewis acids?[i.] \( {CCl}_4 \) [ii.] \( {GeCl}_4 \) [iii.] \( {SiF}_4 \)
Two statements are given below:I. Cellulose acetate is rayonII. Perlan-L is nylon 6, 6
What are \(X\) and \(Y\) respectively in the following reaction?
A solid is dissolved in 1 L water. The enthalpy of its solution (\(\Delta H_{{sol}}^\circ\)) is 'x' kJ/mol. The hydration enthalpy (\(\Delta H_{{hyd}}^\circ\)) for the same reaction is 'y' kJ/mol. What is lattice enthalpy (\(\Delta H_{{lattice}}^\circ\)) of the solid in kJ/mol?
Arrange the following in increasing order of their pK\(_b\) values.
What are \(X\) and \(Y\) in the following reactions?
Which of the following forces stabilize the secondary structure of proteins? A. Hydrogen bondsB. Covalent bondsC. Disulphide linkagesD. Vander Waals forces
Arrange the following complexes in increasing order of the number of unpaired electrons present in the central metal ion:I. \( [Fe(CN)_6]^{3-} \)II. \( [Co(C_2O_4)_3]^{3-} \)III. \( [Mn(CN)_6]^{3-} \)
Which one of the following ions is diamagnetic in nature?
The number of mixed oxides from the following is: \[ {Al}_2{O}_3, {Pb}_3{O}_4, {Mn}_2{O}_7, {Fe}_3{O}_4, {V}_2{O}_5, {Sb}_2{O}_3 \]
