Group 0 and testing ions test questions - WJEC

1

What colour flame do sodium ions give?

Red

Yellow

Apple green

2

Which ion gives a lilac flame test?

Barium

Lithium

Potassium

3

Solid X is dissolved in water. Nitric acid is added and a few drops of silver nitrate. A yellow precipitate forms. Which ion is present in solid X?

Chloride

Bromide

Iodide

4

A white solid was left out after a class had tidied up their experiment. During the experiment, one of the pupils had removed the label on the white solid. The teacher knew the solid was a Group 1 metal halide, so they performed a flame test followed by a silver nitrate test. The flame test gave a red flame, and the silver nitrate test gave a cream precipitate. What is the white solid?

Lithium bromide

Potassium bromide

Lithium iodide

5

Which of the following is a use for argon?

As a shield gas when welding metals

To make the bubbles in fizzy drinks

To fill floating party balloons

6

Which of these could be the electronic structure of a noble gas?

2,8,2

2,8,8

2,8,6

7

What is the most characteristic property of the noble gases?

They are inert

They have high densities

They are good conductors of electricity

8

What is the electron structure of helium?

2,1

9

Why are the noble gases unreactive?

They all have one electron in their outer shell

They all have a full outer shell of electrons

They all have a low density

10

Which noble gas is used in weather balloons which carry measuring instruments high into the atmosphere?

Helium

Neon

Argon