202066 marks18 questions
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Source: JEE (Advanced) 2020, Paper 1, Chemistry, published by JEE (Advanced). The official PDF
Which of the following liberates O₂ upon hydrolysis?
A colorless aqueous solution contains nitrates of two metals, X and Y. When it was added to an aqueous solution of NaCl, a white precipitate was formed. This precipitate was found to be partly soluble in hot water to give a residue P and a solution Q. The residue P was soluble in aq. NH₃ and also in excess sodium thiosulfate. The hot solution Q gave a yellow precipitate with KI. The metals X and Y, respectively, are
In thermodynamics, the P − V work done is given by w = − ∫ dV Pext. For a system undergoing a particular process, the work done is, w = − ∫ dV (RT/(V − b) − a/V²). This equation is applicable to a
Choose the correct statement(s) among the following:
With respect to hypochlorite, chlorate and perchlorate ions, choose the correct statement(s).
Consider a 70% efficient hydrogen-oxygen fuel cell working under standard conditions at 1 bar and 298 K. Its cell reaction is H₂(g) + 1/2 O₂(g) → H₂O(l). The work derived from the cell on the consumption of 1.0 × 10⁻³ mol of H₂(g) is used to compress 1.00 mol of a monoatomic ideal gas in a thermally insulated container. What is the change in the temperature (in K) of the ideal gas? The standard reduction potentials for the two half-cells are given below. O₂(g) + 4H⁺(aq) + 4e⁻ → 2 H₂O(l), E⁰ = 1.23 V, 2H⁺(aq) + 2e⁻ → H₂(g), E⁰ = 0.00 V. Use F = 96500 C mol⁻¹, R = 8.314 J mol⁻¹ K⁻¹.
Aluminium reacts with sulfuric acid to form aluminium sulfate and hydrogen. What is the volume of hydrogen gas in liters (L) produced at 300 K and 1.0 atm pressure, when 5.4 g of aluminium and 50.0 mL of 5.0 M sulfuric acid are combined for the reaction? (Use molar mass of aluminium as 27.0 g mol⁻¹, R = 0.082 atm L mol⁻¹ K⁻¹)