1. ASSERTION: The solubility of gases in water follows the order O2 < N2 < SO2 < CO2 < NH3. REASON: For appreciable solubility, the solute-solvent interactions should outweigh the solute-solute and solvent-solvent interactions. a. Assertion and reason both are correct statements and reason is the correct explanation for assertion. b. Assertion and reason both are correct statements but reason is not the correct explanation for assertion. c. Assertion is a correct statement but reason is a wrong statement. d. Assertion is a wrong statement but reason is a correct statement.
1. ASSERTION: The solubility of gases in water follows the order O2 < N2 < SO2 < CO2 < NH3.
REASON: For appreciable solubility, the solute-solvent interactions should outweigh the solute-solute and solvent-solvent interactions.
a. Assertion and reason both are correct statements and reason is the correct explanation for assertion.
b. Assertion and reason both are correct statements but reason is not the correct explanation for assertion.
c. Assertion is a correct statement but reason is a wrong statement.
d. Assertion is a wrong statement but reason is a correct statement.
2. ASSERTION: The solubility of all gases in water decreases with the rise in temperature.
REASON: The dissolution of gases in water is an endothermic process.
a. Assertion and reason both are correct statements and reason is the correct explanation for assertion.
b. Assertion and reason both are correct statements but reason is not the correct explanation for assertion.
c. Assertion is a correct statement but reason is a wrong statement.
d. Assertion is a wrong statement but reason is a correct statement.
3. ASSERTION: The random or zig-zag motion of the colloidal particles in the dispersion medium is referred to as Brownian Movement.
REASON: The zig-zag motion of colloidal particles is due to bombardment on colloidal particles by molecules of the dispersion medium.
a. Assertion and reason both are correct statements and reason is the correct explanation for assertion.
b. Assertion and reason both are correct statements but reason is not the correct explanation for assertion.
c. Assertion is a correct statement but reason is a wrong statement.
d. Assertion is a wrong statement but reason is a correct statement.
4. An unknown substance in a container is a single phase and the components were not separated using an ordinary filter paper. Under a microscope, only a transparent liquid is visible. What is the most likely classification of this unknown substance?
a. Emulsion
b. Solution
c. Suspension
d. Colloid
5. Which of the following statements is TRUE about the effect of 1 gram of ethanol and 1 gram of sodium chloride in elevating the vapor pressure of a solution?
a. One gram of ethanol has the same effect in boiling point as one gram of sodium chloride.
b. One gram of sodium chloride can elevate the boiling point more than the effect of ethanol.
c. One gram of ethanol can elevate the boiling point more than the effect of sodium chloride.
d. Both solutes cannot elevate the boiling point of a solution because they aggregate together.
6. lonic compounds and organic compounds usually undergo spontaneous
a. Chemical energy
b. Activation energy
c. Endothermic reaction
d. Exothermic reaction
7. He discovered that coal tar's major components were
a. William Henry Perkin
b. August Wilhelm Hofmann
c. Robert Koch
d. Michael Faraday
8. Among covalent bonds in organic compounds, which type of bond requires the greatest energy to be disrupted?
a. Ionic bond
b. Single bond
c. Double bond
d. Triple bond
9. Based on chemical reactivity, organic molecules which have free pi bonds are classified as
a. Positive
b. Negative
c. Electrophiles
d. Nucleophiles
10. What happens to organic molecules when they dissolve in water?
a. They undergo compete ionization and interact with the solvent system.
b. They occupy the surface of the resulting solution, elevating boiling point.
c. They form intermolecular forces of attraction with the solvent system.
d. They settle down at the bottom of the resulting solution, elevating vapor pressure.
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