Chem Tests A

A lighted splint is held to the mouth of the test tube containing a gas which explodes with a squeaky ‘pop’.

What is this gas?

• Oxygen

• Hydrogen

• Ammonia

• Carbon dioxide

• Chlorine

Hold a piece of damp red litmus paper near the mouth of the test tube containing a gas which turns the red litmus paper blue.

What is this gas?

• Oxygen

• Hydrogen

• Ammonia

• Carbon dioxide

• Chlorine

A gas released from an experiment is collected and bubbled through limewater which turns the limewater chalky/milky.

What is this gas?

• Oxygen

• Hydrogen

• Ammonia

• Carbon dioxide

• Chlorine

A gas released from an experiment is collected in a test tube. A piece of damp litmus paper is bleached (turns white) when in contact with this gas.

What is this gas?

• Oxygen

• Hydrogen

• Ammonia

• Carbon dioxide

• Chlorine

When a glowing splint is put into a test tube containing a gas, it relights/rekindles the glowing splint.

What is this gas?

• Oxygen

• Hydrogen

• Ammonia

• Carbon dioxide

• Chlorine

When a platinum / nichrome wire is FIRST dipped into HCl acid and THEN dipped into the salt being tested, which contains the cation being tested for. What is the name of this test?

• Fire test

• Exhaust test

• Hot test

• Spicy test

• Flame test

In a "Flame test", a wire is FIRST dipped into HCl acid and THEN dipped into the salt being tested, which contains the cation being tested for).

What is the wire made of?

( Check two answers )

• platinum

• nickle

• nichrome

• chromium

• Flame test

In a flame test, a platinum/nichrome wire is FIRST dipped into HCl acid and THEN dipped into the salt which contains copper (II) ions.

What colour is the flame when the wire is then held in a flame?

• red

• blue green

• lilac

• orange-red

• yellow

In a flame test, a platinum/nichrome wire is FIRST dipped into HCl acid and THEN dipped into the salt which contains calcium ions.

What colour is the flame when the wire is then held in a flame?

• red

• blue green

• lilac

• orange-red

• yellow

In a flame test, a platinum/nichrome wire is FIRST dipped into HCl acid and THEN dipped into the salt which contains lithium ions.

What colour is the flame when the wire is then held in a flame?

• red

• blue green

• lilac

• orange-red

• yellow