Test: Adsorption - 2 - Chemistry MCQ

Variation of x/m vs. P are plotted for a gas at different temperature as shown below. The correct order of temperature is:

Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at 25°C. For this process, the correct statement is:

Adsorption of gas on solid surface depends upon:

Which of the following statements is correct for the spontaneous adsorption of a gas:

3 g of activated charcoal was added to 50 mL of acetic acid solution (0.06 N) in a flask. After an hour it was filtered and the strength of the filtrate was found to be 0.042 N. The amount of acetic acid adsorbed (per gram of charcoal) is:

For a linear plot of log (x/m) versus log P in a Freundlich adsorption isotherm, which of the following statements is correct (k and n are constants):

Charcoal (1 g) of surface area 100 m² per gram, adsorbs 60 mg of acetic from an aqueous solution at 25°C and 1 atmosphere pressure. The number of moles of acetic acid adsorbed per cm² of charcoal surface is:

Which statements are correct:

The correct statement(s) pertaining to the adsorption of a gas on a solid surface is (are):

The given graphs/data I, II, III and IV represent general trends observed for different physisorption and chemisorption process under mild conditions of temperature and pressure. Which of the following choice(s) about I, II III and IV is (are) correct:

Which of the followings is not correctly matched:

Which of the followings are favourable conditions for physical adsorption:

Which of the following interface can exist:

Select the correct statements:

True statement(s) about Langmuir isotherm is (are):

When O₂ is adsorbed on a metallic surface, electron transfer occurs from the metal to O₂. The true statement(s) regarding this adsorption is(are):

According to Freundlich adsorption isotherm which of the following is correct:

The adsorption of a gas follows the Langmuir isotherm with K = 1.25 kPa^–1 at 25°C. The pressure (in Pa) at which surface coverage is 0.2 is..............

Calculate the surface area of a catalyst that adsorbs 10³ cm³ of nitrogen reduced to STP per gram in order to form the monolayer. The effective area occupied by N₂ molecule on the surface is 1.62 × 10^–15 cm².

1 g of activated charcoal has a surface area 10³ m³. If complete monolayer coverage is assumed and effective surface area of NH₃ molecule is 0.129 cm², how much NH₃ in cm³ at STP could be adsorbed on 25 g of charcoal.

1 g of activated charcoal has a surface area 10³ m³. If complete monolayer coverage is assumed, how much NH³ in cm³ at STP would be adsorbed on the surface of 25 g of the charcoal. Given diameter of NH₃ molecule = 0.3 nm

20% surface sites have absorbed N₂. On heating N₂ gas is evolved from sites and were collected at 0.001 atm and 298 K in a container of volume 2.46 cm³. Density of surface sites is 6.023 × 10¹⁴ cm^–2 and surface area is 1000 cm². Find out the number of surface sites occupied per molecule of N₂.

1 g of charcoal adsorbs 100 mL of 0.5 MCH₃COOH to form a monolayer and thereby the molarity of CH₃COOH reduces to 0.49. Calculate the surface area of charcoal adsorbed by each molecule of acetic acid. Surface area of charcoal = 3.01 × 10² m²/g.

H₂ gas was adsorbed on 1 g powdered copper surface forming monolayer of molecules. On desorption total H₂ collected measured 1.36 cm³ at STP. Assuming volume of 1 molecule of H₂ 4.742 × 10^–23 cm³, calculate specific area of copper powder

A graph plotted between (P is pressure of gas in atm) shows a straight line with slope equal to 1 and intercept equal to 0.4771. The extent of adsorption (x/m) of gas at the pressure 2 atm is:

Adsorption of ethanoic acid on wood charcoal follows Freundlich isotherm. Calculate the mass of ethanoic acid adsorbed by 500 g of wood charcoal at 300 K form 3 litre of 0.65 M ethanol solution. The value of constant k = 0.16 and n = 2.35. Also report the molarity of left ethanol in solution.

After placing 9 g of charcoal in a one litre vessel containing gas at 300 K, the pressure of the gas decreases by 40% of the original pressure equal to 700 milli bar. Calculate the volume of gas at 1 bar and 273.15 K adsorbed per g of charcoal. Density of charcoal sample is 1.5 g cm^–3.