Chemistry

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Chemistry

You will be given 12 chemistry questions to solve in 20 minutes or 1 minute and 40 seconds (100 seconds) per question.

1 / 12

What is the total number of electrons in the ions of sodium chloride?

2 / 12

The final compound can be synthesised by the following route:

What types of reaction are used in stages 1, 2 and 3?

3 / 12

Which of the following shows how the atomic radius of the elements changes on crossing from left to right in the row of the Periodic Table from potassium to bromine?

4 / 12

The positions of some elements in the Periodic Table are shown below:

5 / 12

Which rows of the table correctly describe the reactions of the aqueous acids with amines and amides?

6 / 12

The positions of some elements in the Periodic Table are shown below:

Which one of the following pairs of elements is most likely to form a covalent bond?

7 / 12

One group of elements in the Periodic Table contains, in descending order, boron, aluminum, gallium, indium and thallium. Which of the following are correct about these elements?
1. Indium forms the oxide In2O3
2. Boron is the least reactive element in the group
3. Gallium forms the sulphate GaSO4

8 / 12

Which of the following statements are correct about the solvent properties of water?
1. All ionic substances dissolve in water.
2. All covalent substances are insoluble in water.
3. The solubility of solids usually increases with a rise in temperature.

9 / 12

Which one of the following is NOT the correct formula for a lithium compound?

10 / 12

Consider the following reactions:

Which one of the following types of reaction is NOT included in this list?

11 / 12

The positions of the main group elements in the Periodic Table are shown below:

Which one of the following formulae is NOT correct?

12 / 12

What is the total number of electrons in an ammonium ion, NH4+ ?

Your score is

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