S2 Forensics

Which of these are NOT a job for a Crime scene Investigator?

• Preventing evidence being spoiled or destroyed by protecting the crime scene.

• Identifying evidence to collect and deciding what the best methods are for obtaining it.

• Recording the crime scene using photography and video.

• Carries out autopsies to find the cause of death

Which of these is not an acid

• Hydrochloric acid

• Sodium bicarbonate (baking powder)

• Vinegar

• Lemon Juice

An unknown solution was tested with universal indicator. It turned orange. It is:

• Alkaline

• Acidic

• Neutral

Complete the equation correctly: Acid + base -->

• salt + water

• salt + hydrogen

• metal + water

• metal + hydrogen

What type of reaction is an acid reacting with a base?

• Neutralisation

• Substitution

• Acidification

• Alkylation

How would you make the crystals of salt as big as possible?

• Cool them quickly

• Cool them slowly

When a metal carbonate reacts with an acid what gas does it form?

• Hydrogen

• Oxygen

• Carbon dioxide

In the following equation the reactants are:

magnesium + hydrochloric acid --> magnesium chloride + water

• magnesium + hydrochloric acid

• magnesium chloride + water

The gas that turns limewater cloudy is:

• carbon dioxide

• oxygen

• hydrogen

The gas that burns with a pop is:

• carbon dioxide

• oxygen

• hydrogen