Tests 😕

Question 1

What’s the test for hydrogen?

Answer 1

A lighted splint makes a squeaky pop noise in a test tube of hydrogen

Question 2

What’s the test for oxygen?

Answer 2

A glowing wooden splint relights in a test tube of oxygen

Question 3

What’s the test for carbon dioxide?

Answer 3

It turns limewater milky (a lighted wooden splint goes out in a test tube of CO2 but this is also true for other gases, so the limewater one is a better choice)

Question 4

What’s the test for Ammonia?

Answer 4

Makes damp red litmus paper turn blue

Question 5

What’s the test for chlorine?

Answer 5

Makes damp blue litmus paper turn red

Question 6

Which ion turns a flame red/

Answer 6

Lithium

Li+

Question 7

Which ion turns a flame orange?

Answer 7

Sodium

Na+

Question 8

Which ion turns a flame lilac?

Answer 8

Potassium

K+

Question 9

Which ion turns a flame brick red?

Answer 9

Calcium

Ca2+

Question 10

Hydroxide ions

Answer 10

Iron(II), Fe2+ Green - turns orange-brown when left standing
Iron(III), Fe3+ Orange-brown
Copper(II), Cu2+ Blue

Question 10

Hydroxide ions

Answer 10

Iron(II), Fe2+ Green - turns orange-brown when left standing
Iron(III), Fe3+ Orange-brown
Copper(II), Cu2+ Blue