NECTA Chemistry – Tanzania

Question 1

Which type of chemical bond is formed by the sharing of electron pairs between atoms?

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Question 2

How many moles are present in 44 g of carbon dioxide (CO2)? (Atomic weights: C=12, O=16)

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Question 3

Which of the following is a characteristic of acids according to the Arrhenius theory?

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Question 4

In an electrochemical cell, what is the function of the salt bridge?

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Question 5

Which functional group is present in alcohols?

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Question 6

If the rate of a reaction doubles when the concentration of a reactant is doubled, what is the order of reaction with respect to that reactant?

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Question 7

In the equilibrium reaction: N2(g) + 3H2(g) ⇌ 2NH3(g), what is the effect of increasing pressure on the position of equilibrium?

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Question 8

Which of the following statements best describes metallic bonding?

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Question 9

What volume of hydrogen gas at STP is produced when 2 moles of zinc react with excess sulfuric acid according to Zn + H2SO4 → ZnSO4 + H2?

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Question 10

What is the number of protons in the nucleus of an atom with atomic number 12?

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