A change in the temperature of a saturated solution disturbs the equilibrium between the

• A. Undissolved solute and the solvent
• B. Dissolved solute and the solvent
• C. Dissolved solute and the undissolved solute
• D. Dissolved solute and the solution

What volume of oxygen at s.t.p is required for the complete combustion of one mole of CH₄?

• A) 61.5 1itres
• B) 24.2 1itres
• C) 44.8 litres
• D) 38.2 litres

Which of the following will shift to the left from dilute tetraoxosulphate (VI) acid?

• A) Lead
• B) Magnesium
• C) Cpper
• D) Gold

The weakest attractive force that can be observed between two molecules is

• A. ionic
• B. covalent
• C. coordinate covalent
• D. van der Waals

The above table shows the compositions of the atmosphere of planet X. Which of these gases are present in higher percentages on earth?

• A. CO\(_2\) and O\(_2\)
• B. N\(_2\) and CO\(_2\)
• C. CO\(_2\), O\(_2\) and N\(_2\)
• D. O\(_2\) and N\(_2\)

Biotechnology is applied in the following except

• A. baking industry
• B. wine production
• C. production of antibiotics
• D. manufacture of soap

Which of the following pH values indicates that a solution is a strong base?

• A. 1
• B. 5
• C. 9
• D. 13

Which of the following pH values is likely to be that of a slightly alkaline solution?

• A. 2
• B. 5
• C. 7
• D. 8

Which of the following statements on electrolytes and conductors is/are true?

• A. Electrolytes are compounds while conductors are elements.
• B. Electrolytes contain mobile ions while conductors consist of mobile electrons
• C. Electrolytes can be solution while conductors are usually solids
• D. Electrolytes and conductor can both be decomposed by an electric current

Which of the following statements is not true of halogens?

• A. they exist in different physical states
• B. they exist as diatomic molecules
• C. their ionic radii decrease down the group
• D. their melting and bolling points increase down the group