NECTA Chemistry – Tanzania

Question 11

Calculate the number of moles in 44 grams of carbon dioxide (CO2). (Atomic masses: C=12, O=16)

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Question 12

In an electrochemical cell, which electrode is the site of oxidation?

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Question 13

Which factor increases the rate of a chemical reaction?

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Question 14

For the equilibrium reaction N2(g) + 3H2(g) ⇌ 2NH3(g), what happens when the pressure is increased?

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Question 15

Which of the following compounds is an example of an ester?

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Question 16

If 12 grams of carbon-12 contain 1 mole of atoms, how many atoms are present in 6 grams of carbon-12?

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Question 17

Which of the following is a property characteristic of acids?

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Question 18

Which of the following is an example of an organic compound?

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Question 19

The rate of a chemical reaction can be increased by:

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Question 20

In chemical equilibrium, which statement is TRUE?

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