ASLevel Physics Quiz #2

The table shows the numbers of protons, neutrons and electrons in four different particles, W, X, Y, and Z.

Which pair represents the atoms of two isotopes of the same element?

• A W and Y

• B W and Z

• C X and Y

• D X and Z

Where in the Periodic Table is the element that has an outer electron shell arrangement of 4s² 4p³ ?

• A

• B

• C

• D

Substance Q is a hydrocarbon. When 1.00 g of Q is completely burned, 3.22 g of carbon dioxide is produced.

What could be the identity of Q?

• A cyclohexene

• B cyclopentane

• C ethene

• D pentane

Originally, chemists thought indium oxide had the formula InO. By experiment they showed that

4.8 g of indium combined with 1.0 g of oxygen to produce 5.8 g of indium oxide. The Ar of oxygen was known to be 16.

Which value for the Ar of indium is calculated using these data?

• A 38

• B 77

• C 115

• D 154

In which substance are the only intermolecular forces temporary dipole-induced dipole attractions?

• A hydrogen chloride

• B methanol

• C octane

• D water

A solution contains 0.25 g of sulfur dioxide in 1.00 dm³ of water.

Which volume of sulfur dioxide, measured at 50 ^oC and a pressure of 1 x 10⁵Pa, must be added to 1.00 dm³ of water to produce this solution?

• A 0.0162 cm³

• B 0.105 cm³

• C 16.2 cm³

• D 105 cm³

An experiment was performed to determine the enthalpy of combustion of ethanol.

The data collected are shown.

mass of water = W g

mass of ethanol burned = X g

temperature rise = Y⁰C

molar mass of ethanol = Z g.mol^–1

specific heat capacity of water = 4.2 J.K^–1g^–1

Which expression can be used to calculate the enthalpy of combustion of ethanol in kJ.mol^–1?

• 
• 
• 
• 

VO₂Cl reacts with NaI under acidic conditions.

2VO₂Cl + 2H₂SO₄ + 2NaI --> VOCl₂ + VOSO₄ + I₂ + Na₂SO₄ + 2H₂O

The oxidation state of Cl is –1 in VO₂Cl and in VOCl₂.

Which row about this reaction is correct?

• A

• B

• C

• D

In which reaction is water behaving as a Brønsted–Lowry base?

• A H₂O + Na -> NaOH + ¹/₂H₂

• B H₂O + H₃PO₄ -> H₃O+ + H₂PO₄^–

• C H₂O + CaO -> Ca(OH)₂

• D NH₃ + [Cu(H₂O)₆] ²⁺ -> NH₄⁺ + [Cu(H₂O)₅(OH)]⁺

A large excess of marble chips is reacted with 25 cm³ of 1.0 mol.dm^–3 hydrochloric acid at 40 ^oC.

How is the result different when the reaction is repeated with 60 cm³ of 0.5 mol.dm^–3 hydrochloric acid at 40 ^oC?

• A The reaction is faster and more of the products are made when the reaction is complete.

• B The reaction is faster and less of the products are made when the reaction is complete.

• C The reaction is slower and more of the products are made when the reaction is complete.

• D The reaction is slower and less of the products are made when the reaction is complete.