S4N Science Chemistry Paper 1

Which apparatus would be most suitable to measure out 25.0cm3 of solution?

• beaker

• burette

• measuring cylinder

• pipette

Which of the following statements correctly describes the states of substances I to IV at room temperature?

• substance I is a gas

• substance II is a solid

• substance III is a gas

• substance IV is a liquid

Four samples of canned food, apricots, beans, corns and tomatoes, were tested for additices using chromatography. The chromatograms were compared with three artificial additives, P1, P2 and P3.

Which canned food does not contain any artificial additives?

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• apricots

• beans

• corn

• tomatoes

An atom of an element X has 5 neutrons and 4 protons.

Which of the particle is an isotope of element X?

• A

• B

• C

• D

The electronic structures of atoms P and Q are shown.

P and Q react to form a covalent compound. What is the formula?

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How does molten sodium chloride conduct electricity?

• The movement of positive ions only

• The flow of mobile electrons

• The movement of sodium chloride molecules

• The movement of both positive and negative ions

The equation shows the reaction that occurs when ethanol burns in air.

What values of x, y, and Z would balance the equation?

• x: 2

  y: 2

  z: 2

• x: 3

  y: 2

  z: 3

• x: 3

  y: 2

  z: 2

• x: 3

  y: 3

  z: 2

Which diagram shows a mixture of two compounds?

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The diagram below shows the structural formula of a molecule of methanol.

What is the relative molecular mass, Mr, of methanol?

• 9

• 26

• 32

• 46

A coal-burning heater is inefficient and badly sealed. The limestone (calcium carbonate) walls near the heater are being gradually worn away.

Which gas, when escapes from the heater, causes the walls to be worn away?

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