Which of the following statements about a molar solution is correct? it

• A. is a supersaturated solution
• B. cannot dissolve more of the solute at that temperature
• C. contains any amount of solute in a given volume of solution
• D. contains one mole of the solute in 1 dm3 of solution

What is the concentration of H\(^+\) ions in moles per dm\(^3\) of a solution of pH 4.398?

• A)
  \(4.0 \times 10^{-5}\)
• B)
  \(0.4 \times 10^{-5}\)
• C)
  \(4.0 \times 10^{-3}\)
• D)
  \(0.4 \times 10^{-3}\)

Aromatic and aliphatic hydrocarbons can be distinguished from each other by the?

• A. action of bromine
• B. use of polymerization reaction
• C. action of heat
• D. use of oxidation reaction

The energy which accompanies the addition of an electron to an isolated gaseous atom is

• A. Atomization
• B. Electronegativity
• C. Electron affinity
• D. Ionization

56.00cm³ of a gas at S.T.P. weighed 0.11g. What is the vapour density of the gas? [Molar volume of a gas at S.T.P = 22.4dm³]

• A. 11.00
• B. 22.00
• C. 33.00
• D. 44.00

What is the mass of silver deposited when 24,125 C of electricity is passed through a solution or silver salt. [Ag = 108, IF = 96,500 C ]

• A. 432g
• B. 108g
• C. 54g
• D. 27g

An element Q forms a compound QCI₅. In which group of the periodic table is Q?

• A. l
• B. lll
• C. V
• D. VII

A compound commonly used for sterilization and preservation of specimens and food is

• A) ethanol
• B) benzene
• C) ether
• D) ammonia

The haloalkanes used in dry-cleaning industries are

• A) trichloromethane and tetrachloromethane
• B) chloroethene and dichloroethene
• C) trichloroethene and tetrachloroethene
• D) chloroethane and dichloroethene

The cleansing action of soap in hard water is not satisfactory because soap

• A. forms insoluble calcium and magnesium salts
• B. is made from fats and oils
• C. has an organic component
• D. alters the surface tension of water