Foundations in Chemistry Random Retrieval

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Foundations in Chemistry Random Retrieval

This quiz contains all the questions in the Foundations in Chemistry section. The website will pick 10 questions at random.

1 / 10

In the half equation: MnO4- (aq) + 8H+(aq) + ne- -> Mn2+(aq) + 4H2O(l) the value of n is:

2 / 10

Which of these compounds dissolve in water and react to form a solution containing hydroxide ions:

(i) sodium oxide

(ii) ammonium chloride

(iii) ammonia

(iv) sodium chloride

3 / 10

In which of these elements are the atoms or molecules closely packed but free to move around sliding past each other at room temperature?

(i) mercury

(ii) argon

(iii) bromine

(iv) iodine

4 / 10

In a close-packed metal structure:

(i) there are no spaces between the atoms

(ii) the atoms are arranged in layers

(iii) the crystal breaks if the layers slide past each other

(iv) each atom touches 12 nearest neighbours.

5 / 10

Typically metal elements, unlike most solid non-metal elements:

(i) are shiny

(ii) conduct electricity

(iii) bend and stretch without breaking

(iv) have low tensile strength.

 

6 / 10

Which of these statements are true for the hydrides of group 5: NH3, PH3, AsH3 and SbH3:

(i) the molecules decrease in size down the group

(ii) the boiling point of ammonia is higher than expected from the general trend in values down the group

(iii) none of the molecules is polar

(iv) only ammonia is affected by hydrogen bonding

7 / 10

What is the bond angle found in ammonia?

8 / 10

9 / 10

How many complete sub-shells are there in the phosphorus atom?

10 / 10

How many neutrons are there in an atom of boron with mass number 9 and atomic number 4?

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