NEET Chemistry Physics Biology
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Which of the following statements is incorrect?Anonymous voting
- I.E.1 of O is lower than that of N but I.E.2 O is higher than that of N
- The enthalpy of N to gain an electron is almost zero but of P is 74.3 kJ mol-1
- isoelectronic ions belong to the same period
- The covalent radius of iodine is less than its Van der Waal’s radius
Calculate the standard cell potentials of the galvanic cells in which the following reactions take place
2Cr(s)+3Cd⁺²(aq)→2Cr⁺³aq) + Cd(s)
Given E⁰ Cr⁺³ / Cr = − 0.74 V , E⁰ Cd⁺²/ Cd = − 0.40 VAnonymous voting
- 0.34 V
- -0.34 V
- 3.4 V
- -3.4 V
"The standard electrode potential for Daniell cell is 1.1V. What is the standard Gibbs energy for the reaction:
Zn(s) + Cu⁺²(aq) --> Zn⁺²(aq) + Cu(s)"Anonymous voting
- -112.27 kJ mol⁻¹
- 112.27 kJ mol⁻¹
- 212.27 kJ mol⁻¹
- –212.27 kJ mol⁻¹
Calculate the potential of hydrogen electrode in contact with a solution whose pH is 10.Anonymous voting
- -0.591V
- 0.591V
- -1.591V
- 1.591V
👍 1😁 1
"Calculate the equilibrium constant of the reaction:
Cu(s) + 2Ag⁺(aq) ® Cu⁺²(aq) + 2Ag(s)"Anonymous voting
- 392 × 10¹⁵
- 39.2 × 10¹⁵
- 3.92 × 10¹⁵
- 0.392 × 10¹⁵
What is the emf of the cell in which the following reaction takes place: Ni(s) + 2Ag⁺ (0.002 M) --> Ni⁺² (0.160 M) + 2Ag(s) Given that Enot (cell) = 1.05 VAnonymous voting
- 1.91V
- -0.91V
- 0.91V
- -1.91V
which of the following has long-range order in the arrangement of constituent particles?Anonymous voting
- glass
- rubber
- sodium chloride
- quartz glass
in which of the following solids, Electrical resistance has different values along different directionsAnonymous voting
- plastic
- quartz glass
- rubber
- sodium chloride
Which of the reactions will need the maximum amount of energy?Anonymous voting
- Na → Na+ + e–
- Ca+ → Ca++ + e–
- K+ → K+ ++ e–
- C2+ → C3+ + e–
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