Unit 1- pas paper question

Question 1

Name an element that has similar chemical properties to chlorine.

Answer 1

any group 7 elements

Question 1

State the numer of elements that exist as diatomic molecules

Answer 1

7

Question 2

Which of the following compounds forms molecules with an angular structure?
A.) CCl4
B.) NCl3
C.) SCl2
D.) FCl

Answer 2

C

Question 3

In which of the following compounds does the iron ion have a 3+ charge?
You may wish to use the data booklet to help you.
A FeO
B FeP
C Fe(NO3)2
D Fe3(PO4)2

Answer 3

B

Question 4

Which of the following substances, when shaken with water, would cause the pH of water to
increase?
You may wish to use the data booklet to help you.
A Aluminium oxide
B Barium oxide
C Nitrogen oxide
D Hydrogen oxide

Answer 4

B

Question 5

Nickel carbonate, nickel hydroxide and nickel metal all react with dilute sulfuric acid.
Which of the following statements is true for all three reactions?
A A gas is produced.
B Water is produced.
C Nickel sulfate is produced.
D A neutralisation reaction takes place.

Answer 5

C

Question 6

Methane is a covalent molecular substance.

It has a low boiling point and is a gas at room temperature.

Explain why methane is a gas at room temperature.

Answer 6

Weak intermolecular attractions

Question 7

The bonds between the molecules are weak/strong and the bonds within the molecules are weak/strong

Answer 7

weak, strong

Question 8

Glass is made from the chemical silica, SiO2, which is obtained from sand.
Silica has a melting point of 1713oC.

State the term used to describe the structure of silica.

Answer 8

Covalent network

Question 9

When liquid water changes to steam:

A weak forces of attraction between the water molecules are broken

B strong forces of attraction between the water molecules are broken

C weak forces of attraction between the atoms in the water molecules are broken

D strong forces of attraction between the atoms in the water molecules are broken