Chemistry NCERT Exemplar Solutions Class 12th Chapter Twelve

Number of grams of bromine that will completely react with 5.0g of pent-1-ene is_____________*10^-2g. (Atomic mass of Br = 80 g/mol) (Nearest Integer)

If ${\left[Cu{\left(H_{2}O\right)}_4\right]}^{2+}$  absorbs a light of wavelength 600nm d-d transition, then the value of octahedral crystal field splitting energy for ${\left[Cu{\left(H_{2}O\right)}_6\right]}^{2+}$  will be_________* 10^-21J. (Nearest Integer)

(Given: h = 6.63 * 10^-34 Js and c = 3.08 * 10⁸ ms^-1)

For a given chemical reaction

${\gamma }_{1}A+{\gamma }_{2}B\to {\gamma }_{3}C+{\gamma }_{4}D$            

Concentration of C charges form 10 mmol dm^-3 to 20 mmol dm^-3 in 10 second. Rate of appearance of D is 1.5 times the rate of disappearance of B which is twice the rate of disappearance A. The rate of appearance of D has been experimentally determined to be 9 mmol dm^-3 s^-1. Therefore the rate of reaction is_____________mmol dm^-3 s^-1 (Nearest Integer)

In a cell, the following reactions take place

Fe²⁺ → Fe³⁺ $E_{F{e}^{3+}/F{e}^{2+}}^0=0.77V$                         

2I^- → I₂ + 2e^- $E_{I_2/I^{-}}^0=0.54V$                       

The standard electrode potential for the spontaneous reaction in the cell is x * 10^-2 V 298 K. The value of x is________(Nearest Integer)

The standard free energy change $\left(\Delta G°\right)$  for 50% dissociation of N₂O₄ into NO₂ at $27°C$  and 1 atm pressure is -xJ mol^-1. The value of x is_________. (Nearest Integer)

[Given: R= 8.31 J k^-1 mol^-1, log 1.33 = 0.1239, In 10 = 2.3]

1L aqueous solution of H₂SO₄ contains 0.02m mol H₂SO₄. 50% of this solution is dilutd with deionized water to give 1L solution (A). In solution (A), 0.01m mol of H₂SO₄ are added. Total m mols of H₂SO₄ in the final solution is ________* 10³ m mols

The standard entropy change for the reaction $4Fe\left(s\right)+3O_2\left(g\right)\to 2F{e}_2{O}_3\left(s\right)is-550J{K}^{-1}at298K$  

[Given: The standard enthalpy change for the reaction is -165 kJ mol^-1]. The temperature in K at which the reaction attains equilibrium is__________.

[Nearest Integer)

The longest wavelength of light that can be used for the ionization of lithium atom (Li) in its ground state is x * 10^-8m. The value of x is_________. (Nearest Integer)

The distance between Na⁺ and Cl^- ions in solid NaCl of density 43.1g cm^-3 is ________×10^-10m. (Nearest Integer)

The number of N atoms in 681 g of C₇H₅N₃O₆ is x * 10²¹. The value of x is___________.

(N_A = 6.02 * 10²³ mol^-1) (Nearest Integer)