The concentration of Ag⁺ ion in a given saturated solution of AgCl at 25°C is 1.06 x 10^-5 g ion L^-1 .Thus , the solubility product of AgCl is :

• 0.453 x 10^-10

• 0.530 x 10^-10

• 1.12 x 10^-10

• 2.12 x 10^-10

Heat of combustion of C and CO are -394 and -285 kJ respectively , so heat of formation of CO in kJ/mol is :

• - 218

• - 109

• + 109

• + 218

The product formed is an isobar , if there is :

• 1 $\mathrm{\alpha }$ emission

• 1 $\mathrm{\beta }$ emission

• 1 $\mathrm{\alpha }$ and 1 $\mathrm{\beta }$ emission

• 2 $\mathrm{\alpha }$ and 2 $\mathrm{\beta }$ emission

Solution of 0.l N NH₄OH and 0.1 N NH₄Cl has pH 9.25. Then , pK_b of NH₄OH is :

• 9.75

• 4.75

• 3.75

• 8.25

How many grams of CO₂ will be produced by the complete combustion of 2 moles of ethanol ?

• 132 g

• 44 g

• 176 g

• 88 g

For endothermic reaction :

• E_a > E_a^'

• E_a = E_a^'

• E_a < E_a^'

• None of these

Which of the following changes with change in temperature ?

• Mole fraction

• Formality

• % (w/W)

• Molality

When ${}_{13}{}^{27}\mathrm{Al}$ is bombarded with $\mathrm{\alpha }$ - particle , a radioactive isotope of phosphorus ${}_{15}{}^{30}\mathrm{P}$ is formed .Which particle is emitted along with ${}_{15}{}^{30}\mathrm{P}$ ?

• Deuteron

• Proton

• Electron

• Neutron

9.

The difference between heat of reaction at constant pressure and constant volume of the reaction :

2C₆H₆ (l) + 15O₂ (g) $\to$ 12CO₂ + 6H₂O (l)

at 25°C (in kJ) is :

• - 7.43

• 3.72

• - 3.72

• 7.43

For which reaction will $∆$H - $∆$E = 0 ? Assume that each reaction is carried out in an open container .

• 2CO₂ (g) + O₂ (g) $\to$ 2CO₂ (g)

• PCl₅ (g) $\to$ PCl₃ (g) + Cl₂ (g)

• H₂ (g) + Br₂ (g) $\to$ 2HBr (g)

• C (s) + 2H₂O (g) $\to$ 2H₂ (g) + CO₂ (g)