Ncert Solutions Chemistry Class 11th

The pressure of a moist gas at $27°C$ <!-- [if gte mso 9]><xml> </xml><![endif]--> is 0.04 atm. The volume of the container is doubled at the same temperature. The new pressure of the moist gas is _______ × 10^-1atm. (Nearest integer)

(Given: The vapour pressure of water at $27°C$ <!-- [if gte mso 9]><xml> </xml><![endif]--> is 0.4 atm)

The number of stereoisomers formed in a reaction of

$\left(\pm \right)Ph\left(C=O\right)C\left(OH\right)\left(CN\right)PhwithHCNis\_\_\_\_\_\_\_\_\_\_\_\_.$

‘x’ g of molecular oxygen(O₂) is mixed with 200g of neon (Ne). The total pressure of the non-reactive mixture of O₂ and Ne in the cylinder is 25 bar. The partial pressure of Ne is 20 bar at the same temperature and volume. The value of ‘x’ is_________.

When 600 mL of 0.2 M HNO₃ is mixed with 400 mL of 0.1 M NaOH solution in a flask, the rise in temperature of the flask is_________ × 10^-2 °C.

(Enthalpy of neutralization = 57 kJ mol^-1 and Specific heat of water = 4.2 JK^-1 g^-1)

(Neglect heat capacity of flask)

Ka for butyric acid (C₃H₇COOH) is 2 × 10^-5. The pH of 0.2 M solution of butyric acid is ____________× 10^-1 (Nearest integer)

[Given log2 = 0.30]

The standard free energy change $\left(\Delta G°\right)$ <!-- [if gte mso 9]><xml> </xml><![endif]--> for 50% dissociation of N₂O₄ into NO₂ at $27°C$ <!-- [if gte mso 9]><xml> </xml><![endif]--> 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]

The standard entropy change for the reaction $4Fe\left(s\right)+3O_2\left(g\right)\to 2F{e}_2{O}_3\left(s\right)is-550J{K}^{-1}at298K$ <!-- [if gte mso 9]><xml> </xml><![endif]--> 

[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)