GCSE Chemistry - Monitoring and Controlling Chemical Reactions - 1 - Exam Style Questions with Answers

Created on February 16, 2023 By

paruppts12

GCSE_OCR_CHE_5_CHEMICAL_1

1 / 10

B

D

C

A

2 / 10

In a closed system a reversible reaction will form an equilibrium mixture.
Which of the following statements are true for a reversible reaction at equilibrium?

The position of equilibrium will not change if more product is added.

The concentration of the reactants does not change.

The concentration of the reactants is the same as the concentration of the products.

The position of equilibrium moves to the left when product is removed from the equilibrium

The rate of the forward reaction is faster than the rate of the backward reaction.

3 / 10

universal indicator is a mixed indicator

All of the above

colour changes slowly

universal indicator is made up of different components

universal indicator gives the pH rather than the end-point

4 / 10

Oskar’s actual yield of hydrogen peroxide is 1530 g.
He predicts he should make 1700 g of hydrogen peroxide.
Calculate Oskar’s percentage yield of hydrogen peroxide.
percentage yield = ..........................%

48%

90%

60%

75%

5 / 10

0.015

1.50

0.15

0.0015

6 / 10

0.06 g

6.0 g

0.6 g

60 g

7 / 10

157

315

134

239

8 / 10

no product is wasted

same number of atoms on each side of the equation

all reactants have been converted into products

all atoms in reactants end up in the product

9 / 10

0.25

0.025

0.0025

0.00025

10 / 10

Increases

Smaller

Decrease S

Your score is

The average score is 8%

0%