# Chemistry Past Questions

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### Question 1

The minimum amount of energy required for effective collisions between reacting particles is known as

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### Question 2

The bond formed between $$H_2O$$ and $$H^+$$ to form the hydroxonium $$H_3O^+$$ is

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### Question 3

An element $$X$$ froms the following oxides $$X_2O, XO$$ and $$XO_2.$$ This phenomenon illustrates the law of ________?

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### Question 4

How many moles of oxygen would contain $$1.204 \times 10^24$$ molecules?NB: Avogadro's constant (NA) $$= 6.02 \times 10^23$$

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### Question 5

Which of the following statements about solids is correct?

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### Question 6

Which of the following apparatus can be used to measure a specific volume of a liquid accurately?

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### Question 7

The general gas equation $$\frac{PV}{T} = K$$ is a combination of

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### Question 8

The spreading of the scent of a flower in a garden is an example of_____?

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### Question 9

Propane carbon(IV)oxide diffuse at the same rate because [H = 1.00, C = 12.0, O = 16.0]

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### Question 10

The energy which accompanies the addition of an electron to an isolated gaseous atom is

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### Question 11

An aqueous solution of (NH4)2 SO4 is

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### Question 12

When NH4Cl(s) is dissolved in water, the container feels cold to touch. This implies

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### Question 13

The pH of four solutions M,N,Q and R are 2,6,8 and 11 respectively.Which of the following deductions about the solutions is correct?

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### Question 14

Consider the following reaction equationH3O+(aq) + OH(aq) → 2H2O(l)The reaction represents

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### Question 15

The refreshing characteristic taste of fizzy drinks is due ot the presence of

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