A2 Chemistry Revision

Observations

100

What is the observation when Bromine water is added to But-2-ene?

Orange to colourless

200

What would be the observation of adding acidified manganate solution to 2-methylpropan-2-ol?

No observation

300

What would be the observations of adding bromine water to phenol?

white ppt

400

Excess HCl solution was added to copper hydroxide solid. What are the two key observations?

Solid dissolves 

Yellow solution forms

500

What are the organic reactants, catalyst and conditions required for yellow ppt formed?

Iodine with NaOH (aq) and methyl ketones

Reactions

100

What is the catalyst or condition required for the reaction between chlorine and butane?

UV light

200

How many organic products are produced when Hex-1-3-diene reacts with hot, acidified and concentrated manganate(VII) ion?

2

300

A concentrated aqueous solution of hydrochloric acid is electrolysed, what are the products in the cathode and anode?

cathode hydrogen gas

anode chlorine gas

400

What are the steps (including the reagents and conditions) to make diazonium ion from Benzene ring?

Step1: Conc HNO3 and Conc H2SO4 50-60 degrees

Step 2:Sn with conc HCl

Step 3: HNO2 and HCl under 10 degrees celciu

500

What are the sulfur containing products produced in reaction between sodium chloride and conc sulfuric acid?

NaHSO₄

SO₂

S

H₂S

Trends and Patterns

100

Describe the trend of thermal stability of hydrogen halides. 

decreases down the group

200

Identify two factors which affect the enthalpy change of lattice. 

1. Size of the ions 

2. Charge number

300

Explain why second electron affinity is always positive?

adding electron to already negative ion

400

Describe and explain the solubility of Group 2 hydroxides?

1. Solubility Increases down the group

2. Overall enthalpy of solution becomes more exo down the group.

3. Both Lattice and hydration enthalpy decreases down the group.

4. Lattice enthalpy decreases more significantly

500

Explain why oxygen has lower electron affinity than nitrogen.

Electron pair repulsion of paired electrons in the p orbital.

Chemistry Random

100

What is the pH of the solution when NaCl is mixed with water?

7

200

Define ionic bonding

electrostatic attraction between positive and negative ions.

300

What are the two gases formed when catalytic converter is used in a car?

nitrogen and carbon dioxide

400

What is the formula of the product when aluminium oxide reacts with hot concentration sodium hydroxide?

NaAl(OH)₄

500

1mol of HCl and 1 mol of CH₃COOH (pKa 4.76) are mixed in 1dm³ of water. 1 mol of NaOH is added. What is the pH of the solution?

2.38

Random

100

How many stars are there in NZ flag?

4

200

Which civilisation used cocoa beans as currency and built its capital city on a lake?

Aztec

300

Which organisation determines the interest rates of USA?

Federal Reserve Bank

400

Who is the last pharao of Egypt?

Cleopatra

500

What is the most recent PC game Mr Kim play?

Xcom 2