HSC Science Class 12 - Tamil Nadu Board of Secondary Education Question Bank Solutions

Arrange the following solutions in the decreasing order of specific conductance.

i) 0.01 M KCl

ii) 0.005 M KCl

iii) 0.1 M KCl

iv) 0.25 M KCl

v) 0.5 M KCl

Why is AC current used instead of DC in measuring the electrolytic conductance?

0.1 M NaCl solution is placed in two different cells having cell constant 0.5 and 0.25 cm⁻¹ respectively. Which of the two will have a greater value of specific conductance.

Ionic conductance at infinite dilution of Al³⁺ and \[\ce{SO^{2-}_4}\] are 189 and 160 mho cm² equiv⁻¹. Calculate the equivalent and molar conductance of the electrolyte Al₂(SO₄)₃ at infinite dilution.

For Freundlich isotherm a graph of log `"x"/"m"` is plotted against log p. The slope of the line and its y-axis intercept respectively corresponds to ____________.

Which of the following is incorrect for physisorption?

Which one of the following characteristics is associated with adsorption?

Adsorption of a gas on solid metal surface is spontaneous and exothermic, then ____________.

If x is the amount of adsorbate and m is the amount of adsorbent, which of the following relations is not related to adsorption process?

Give two important characteristics of physisorption.

Differentiate physisorption and chemisorption.

In case of chemisorption, why adsorption first increases and then decreases with temperature?

Which will be adsorbed more readily on the surface of charcoal and why? NH₃ or O₂?

Heat of adsorption is greater for chemisorptions than physisorption. Why?

What are the factors which influence the adsorption of a gas on a solid?

Why is desorption important for a substance to act as a good catalyst?

An alcohol (x) gives blue colour in Victormeyer’s test and 3.7 g of X when treated with metallic sodium liberates 560 mL of hydrogen at 273 K and 1 atm pressure what will be the possible structure of X?

Which of the following compounds on reaction with methyl magnesium bromide will give tertiary alcohol.

The X is

on treatment with Con. H₂SO₄ predominately gives