Science Form 2

Which technique stated below is incorrect in the use of a microscope?

• Place the microscope down gently

• clean the lenses with tissue paper

• always start viewing a specimen with both eyes open

• always view a specimen with both eyes open

The smallest organism known to man is made up of..

• one cell

• two cells

• three cells

• many cells

Which of the following is NOT a property of an acid?

• Tastes sour
• Corrosive
• Changes the colour of blue litmus paper to red
• Has a pH value higher than 7

What gas is released when an acid reacts with an reactive metal?

• Oxygen
• Hydrogen
• Helium
• Bromine

Which of the following is NOT a property of an alkali?

• Tastes bitter
• Corrosive
• Changes the colour of blue litmus paper to red
• Has a pH value higher than 7

Which of the following is a strong alkali?

• Sodium hydroxide
• Potassium nitrate
• Sodium nitrate
• Potassium sulphate

Which of the following is NOT a strong acid?

• Ethanoic acid
• Nitric acid
• Hydrochloric acid
• Sulphuric acid

What is the pH value of vinegar?

• 1
• 7
• 4
• 11

What is the pH value of toothpaste?

• 1
• 7
• 14
• 8

What is the pH value of pure water?

• 7
• 14
• 4
• 8