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- 4N
- 4E5N
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4N MCQ Challenge

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Question 1 of 20

1. Question
1 What is the volume of the liquid and which apparatus is used to measure it accurately?

apparatus

volume/cm³

A

burette

11.75

B

burette

10.25

C

measuring cylinder

10.20

D

measuring cylinder

10.25
- A
- B
- C
- D
Correct

Incorrect
Question 2 of 20

2. Question
2 The melting and boiling points of four substances, R, S, T and U, are given in the table.

substance

melting point/ °C

boiling point/ °C

R

– 42

83

S

– 219

– 183

T

115 – 135

150

U

18

290

Which substances exist as liquids at 20 ^oC?
- R and S only
- S and U only
- R and U only
- R, S and U only
Correct

Incorrect
Question 3 of 20

3. Question
3           The diagram shows an experiment.



             What are the colours of the liquids in the flask and beaker at the end of the experiment?



flask

beaker

A

blue

blue

B

blue

colourless

C

colourless

blue

D

colourless

colourless
- A
- B
- C
- D
Correct

Incorrect
Question 4 of 20

4. Question
In the following diagrams, each circle represents an atom. Different sized circles represent different atoms. Which diagram best represents a compound?
- A
- B
- C
- D
Correct

Incorrect
Question 5 of 20

5. Question
Calcium fluoride has the formula CaF₂. Which statement best describes the bond formed between the atoms?
- Each atom of calcium shares two electrons, one with each of the two fluorine atoms.
- Each atom of calcium transfers two electrons, one to each of the two fluorine atoms.
- Each fluorine atom transfers two electrons to a calcium atom.
- Two fluorine atoms transfer one electron each to a calcium atom.
Correct

Incorrect
Question 6 of 20

6. Question
6 Two particles have the following composition, as shown in the table below.

particle

number of

electron

neutron

proton

X

12

12

12

Y

12

13

12

Particles X and Y
- are both negatively charged.
- are substances of the same element.
- have different chemical properties.
- have the same nucleon number.
Correct

Incorrect

Question 7 of 20

7. Question

Which substance is most likely to be a covalent molecule?

substance	boiling point / ^oC	solubility in water	electrical conductivity in liquid state
A	-85	soluble	none
B	-62	insoluble	none
C	1413	soluble	good
D	2977	insoluble	good

A
B
C
D

Correct

Incorrect

Question 8 of 20

8. Question
Sodium metal reacts with water to produce a solution of sodium hydroxide and hydrogen. Which equation is balanced and shows the correct state symbols

             A           Na(s) + H₂O(l) → NaOH(aq) + H₂(g)

             B          Na(s) + H₂O(aq) → NaOH(aq) + H₂(g)

             C          2Na(s) + 2H₂O(aq) → 2NaOH(aq) + H₂(g)

             D          2Na(s) + 2H₂O(l) → 2NaOH(aq) + H₂(g)
- A
- B
- C
- D
Correct

Incorrect
Question 9 of 20

9. Question
Which of the following oxides reacts with both hydrochloric acid and sodium hydroxide?
- lead(II) oxide
- carbon monoxide
- nitrogen dioxide
- magnesium oxide
Correct

Incorrect
Question 10 of 20

10. Question
Which two chemicals will react to make the salt, copper(II) sulfate?
- copper and sulfur
- copper and dilute sulfuric acid
- copper(II) oxide and dilute hydrochloric acid
- copper(II) oxide and dilute sulfuric acid
Correct

Incorrect
Question 11 of 20

11. Question
A drop of Universal Indicator is added to a solution of hydrochloric acid.

What colour change is observed?
- green to purple
- green to blue
- green to red
- green to orange
Correct

Incorrect
Question 12 of 20

12. Question
Which graph shows the trend in melting points of the Group I metals?
- A
- B
- C
- D
Correct

Incorrect
Question 13 of 20

13. Question
Code letters T, U, W, X, Y and Z of six different elements are placed in the Periodic Table shown below.

Which statement is true about the six elements?
- Y and T are elements with 6 valence electrons.
- W and X are elements in the same period.
- W is less reactive than X.
- U and Z are diatomic molecules.
Correct

Incorrect
Question 14 of 20

14. Question
Garden tools are often galvanised to prevent steel from rusting. Galvanising involves coating the steel by dipping it in a molten metal. Which metal is used?
- chromium
- lead
- tin
- zinc
Correct

Incorrect
Question 15 of 20

15. Question
The diagram shows the structure of brass.

Why is brass harder than pure copper?
- The zinc atoms form strong covalent bonds with copper atoms.
- The zinc atoms have more electrons than copper atoms.
- The zinc atoms prevent the layers of copper atoms from sliding over easily.
- The zinc atoms prevent the sea of delocalised electrons from moving freely.
Correct

Incorrect
Question 16 of 20

16. Question
Over 90% of all gold but less than 50% of iron is recycled.

What is the reason for this difference?
- Gold is very limited in nature.
- Iron does not cause land pollution.
- Iron ores will never run out.
- It is more expensive to purify gold.
Correct

Incorrect

Question 17 of 20

17. Question

The reaction of water with four metals P, Q, R and S, is given in the table below.

metal	reaction with water
P	Reacts very readily with cold water.
Q	Reacts very slowly with cold water. Hot metal burns in steam with a brilliant white flame.
R	Explodes with cold water.
S	No reaction with hot or cold water.

Arrange P, Q, R and S in descending order of their reactivity.

S, Q, P, R
R, P, Q, S
S, P, Q, R
R, Q, P, S

Correct

Incorrect

Question 18 of 20

18. Question
Magnesium phosphate has the chemical formula Mg₃(PO₄)₂.

[Relative atomic masses: A_r: O, 16; Mg, 24; P, 31]

How should the relative formula mass, M_r, of magnesium phosphate be calculated?
- 24 + 31 + 16
- (3 x 24) + 31 + (4 x 16)
- (3 x 24) + 31 + (8 x 16)
- (3 x 24) + (2 x 31) + (8 x 16)
Correct

Incorrect
Question 19 of 20

19. Question
An element Z, forms an ion Z -. The electronic configuration of this ion is 2.8. Which statement is true about the element Z?
- Z is in group I and period 2.
- Z is in group I and period 3.
- Z is in group VII and period 2.
- Z is in group VII and period 3.
Correct

Incorrect
Question 20 of 20

20. Question
Compound X is used to control soil acidity.

What is X?
- calcium chloride
- calcium nitrate
- calcium oxide
- calcium sulfate
Correct

Incorrect

	apparatus	volume/cm³
A	burette	11.75
B	burette	10.25
C	measuring cylinder	10.20
D	measuring cylinder	10.25

substance	melting point/ °C	boiling point/ °C
R	– 42	83
S	– 219	– 183
T	115 – 135	150
U	18	290

	flask	beaker
A	blue	blue
B	blue	colourless
C	colourless	blue
D	colourless	colourless

particle	number of
particle	electron	neutron	proton
X	12	12	12
Y	12	13	12

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