MCQs on Surface Chemistry
- Which one of the following is an example of adsorption?
- ammonia in contact with water
- anhydrous CaCl2 with water
- silica gel in contact with water vapours
- all of these
- At 15oC out of H2, CH4, CO2, NH3, which gas will be adsorbed maximum by charcoal?
- Which of the following colloids are solvent hating?
- none of these
- If the dispersed phase is a liquid and the dispersion medium is solid, the colloid is known as
- The process of separating a crystalloid, from a colloid by filtration is called
- The movement of colloidal particles towards the oppositely charged electrodes on passing electric current is known as
- Tyndall effect
- Brownian movement
- None of these
- An emulsifier is a substance which
- stabilizes the emulsion
- coagulates the emulsion
- retards the dispersion of liquid in liquid
- causes homogenesis of emulsion
- Homogeneous catalysis does mean
- Reactants and goods have to be at the same level
- Catalyst and reactants must be in the same phase
- The reaction mixture must be formed homogeneously during
- The reaction mixture distribution must be homogeneous
- Which of the following kinds of catalysis can be explained by the adsorption theory?
- enzyme catalysis
- homogeneous catalysis
- acid base catalysis
- heterogeneous catalysis
- The volume of gases H2, CH4, CO2 and NH3 adsorbed by 1 gm charcoal at 293 K can be given in the order?
- CH4 > CO2 > NH3 > H2
- CO2 > NH3 > H2 > CH4
- NH3 > CO2 > H2 > CH4
- NH3 > CO2 > CH4 > H2