The salt copper(II) sulfate can be made from which of the following pairs of chemicals?
Copper(II) nitrate and sulfuric acid.
Copper(II) carbonate and sodium sulfate.
Copper(II) oxide and sulfuric acid.
Which statement is not true about a pH meter?
A pH meter is more accurate than a chemical indicator.
A pH meter can read the pH of a solution to 1 decimal place.
A pH meter gives a range of 14 different colours depending on the pH of a solution.
Which statement is true about different acids?
Acids have a pH between 8 and 14.
Hydrochloric acid is an example of a strong acid.
Sodium hydroxide is an example of a weak acid.
Which statement is true about the pH scale?
pH 6 is an alkaline solution.
pH 7 is a neutral solution.
pH 8 is an acidic solution.
Universal indicator is used to determine the pH of a solution. Which statement is correct?
Universal indicator turns red in strong alkali.
Universal indicator turns blue in strong acid.
Universal indicator turns orange in weak acid.
If sodium hydroxide is added slowly to hydrochloric acid containing Universal Indicator until it is in excess - what will be the correct sequence of colour changes?
Purple to green to red.
Red to green to purple.
Green to red to purple.
Which of the following is not an example of neutralisation?
Taking an indigestion medicine.
Using toothpaste.
Boiling a kettle.
Which is the correct formula for sodium hydroxide?
NaOH
NAOH
Naoh
Which word equation representing reactions of acids is incorrect?
Acid + alkali → salt + water
Acid + metal carbonate → salt + water + carbon dioxide
Acid + metal → salt + water
Which of the following sequences is correct for making an indicator from beetroot?
Chop the beetroot, add to water in a beaker, boil gently, then pour off the liquid so it can be used as an indicator.
Chop the beetroot and use it as the indicator.
Chop the beetroot, add to water in a beaker, boil gently, then remove the beetroot. Use the beetroot as an indicator.