Free Printable HIgher CIS knowledge check

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HIgher CIS knowledge check

Total questions: 16

Worksheet time: 1hrs 20mins

Name

Class

Date

Use the information in your databook to calculate the enthalpy change for the following reaction:

H_2(g) + Cl_2(g) --> 2HCl_(g)

172

200

-185

450

1. 0.22g of propane (C₃H₈) was used to heat 200cm³ of water. The temperature of water was raised by 35^oC. Calculate the enthalpy of combustion of propane.

-5852

-3218

2297

3456

Use Hess's Law to calculate the enthalpy of combustion of methane

- 891 KJ mol^-1

- 605 KJ mol^-1

- 1041 KJ mol^-1

- 1435 KJ mol^-1

For the reaction...
SO₂ + O₂ <=> SO₃
If the concentration of SO₂is increased, the equilibrium position of the reaction will shift ___________.

to the left

to the right

to the left and right

neither left nor right

For the reaction...
N_{2 (g)}+ 3 H₂ _(g) <=> 2 NH_{3 (g)}
If the pressure in the system is increased, which substance(s) will increase in concentration?

N₂ (as 2 mol gas → 4 mol gas)

H₂ (as 2 mol gas → 4 mol gas)

N₂ and H₂(as 2 mol gas → 4 mol gas)

NH₃ (as 4 mol gas → 2 mol gas)

For the reaction...
N₂ + O₂ <=> 2NO: Δ H = +182 kJ mol^-1.
If the temperature is increased the equilibrium position will shift _______.

to the left

to the right

to the left and right

neither left nor right

When reacting Na with Cl₂, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

90.4%

104%

96.15%

1.04%

CH₄ + 2O₂ → CO₂ + 2H₂O
24 grams of CH₄ was added to the above reaction. Calculate the theoretical yield of CO₂.

66 grams

132 grams

33 grams

8.72

2Fe₂O₃ + C → Fe + 3CO₂

You add 28 grams of carbon. You find the actual yield to be 181.2 grams of CO₂. What is the percent yield of CO₂? (Hint: calculate theoretical yield of CO₂ first)

58.83%

308%

6435%

15.5

10.

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

AlCl₃

Cl₂

11.

Which of the following half reactions correctly represents a reduction half reaction?

Fe →Fe²⁺+ 2e^-

Pb⁴⁺ + 2e^- →Pb²⁺

2O^-2→O₂ + 4e^-

Fe + 3e^- →Fe³⁺

12.

I have 25mLof 1M HCl which neutralises 20mL of NaOH. What is the concentration of the NaOH?

0.8 M

1 M

1.25 M

13.

C₆H₈O₇ + 3NaOH → C₆H₅O₇Na₃ + 3H₂O

Calculate the percentage atom economy for the production of sodium citrate, C₆H₅O₇Na₃.

82.7%

90%

93.5%

14.

In a redox titration with potassium permanganate, no indicator was added, why?

a pH meter is used

It is a self-indicating reaction

15.

In a redox titration, what is the purpose of adding concentrated sulphuric acid to the reaction mixture?

to increase the pH

to provide H⁺ ions

to slow down the reaction

to heat it up

16.

This chromatogram from a gas chromatography shows that there is a higher concentration of sucrose than glucose

true

false

100 %

HIgher CIS knowledge check

Total questions: 16

Worksheet time: 1hrs 20mins

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