SS1 CHEMISTRY 2ND TERM 2023/2024 SESSION

The suitable method for the separation of a mixture of miscible liquids with close temperature range is

• decantation
• filtration
• fractional distillation
• simple distillation

The suitable indicator for titration of strong base against weak acid is

• litmus
• methyl orange
• methyl red
• phenolphthalein

Which of the following is not a physical change?

• Burning of dry leaf to ashes
• Crushing of a piece of chalk to powder
• Dissolution of common salt in a beaker
• Melting of candle wax to form liquid

Blood cells can be separated from its plasma

• centrifugation
• chromatography
• crystallisation
• distillation

An example of a co – ordinate covalent compound is

• Cl₂
• Cu²⁺
• H₂O
• H₃O⁺

The type of bond that exists in ammonia is

• covalent
• dative
• electrovalent
• hydrogen

Elements X and Y have electronic configuration 2, 1 and 2, 8, 7 respectively. Which of the following statements is correct?

• The bond between X and Y will be a coordinate bond
• The bond between X and Y will be covalent
• The bond between X and Y will be electrovalent
• X and Y are in the same period of the periodic table

The IUPAC name for NaHCO₃ is

• sodium bicarbonate
• sodium hydrogen carbonate
• sodium hydrogen trioxocarbonate(IV)
• sodium trioxocarbonate(IV)

What defines the pH of a solution?

• Calcium ion
• Hydrogen ion
• Copper ion
• Oxygen ion

The number of valence electrons in an oxygen atom is

• 1
• 4
• 6
• 8