Snapquiz - Rate of Reaction

This is the Snapquiz on Rate of Reaction. Click here or use the embedded video if you haven't watched the lesson yet.


Question 1. When calculating the rate of change in chemistry, which variable could you be observing change?

Amount of reactant used up.
Amount of fizzing.
Time taken.
Colour.


Question 2. Which is the lowest rate of reaction?

1.08kg per hour.
20g per minute.
0.3g per second.
1000g per hour


Question 3. Why is a high rate of reaction usually more desirable to industrial chemists?

Producing more product in a given time is usually easier.
Producing more product in a given time is usually safer.
Producing more product in a given time is usually cheaper.
Producing more product in a given time is usually purer.


Question 4. 270g of calcium carbonate is heated to 900°C for 30 minutes until it has completely thermally decomposed. What is the rate of reaction?

9g per minute.
0.033 minutes per °C.
0.3g per °C.
0.11 minutes per gram.


Question 5. 120g of magnesium is added to a 0.5 molar solution of sulphuric acid. After 15 minutes it is still reacting and it has produced 60cm3 of hydrogen gas. What is its rate of reaction?

2g per cm3.
0.5cm3 per gram.
8g per minute.
4cm3 per minute.


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