Free Printable CHEMICAL REACTIONS AND EQUATIONS

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CHEMICAL REACTIONS AND EQUATIONS

Total questions: 10

Worksheet time: 10mins

Name

Class

Date

When a scientist mixed two chemicals, an exothermic reaction takes place. Which of the following would be proof that the reaction was exothermic?

a change of color

a change of state

a temperature decrease

a temperature increase

In the reaction methane + oxygen turns into carbon dioxide + water, the methane and oxygen are called _______________.

reactants

products

neutrals

energizers

Which is an example of an endothermic reaction?

burning wood

airplane using fuel

plant leaves using photosynthesis

digesting food

What is the arrow in a chemical equation...
H_{2 +}O --> H₂O

Reactants

Products

Yields

Chemical Equation

Which of the following models best demonstrates a balanced chemical equation?

Which of the following is NOT evidence that that a chemical reaction has occurred?

produces light/heat

production of a gas

formation of a precipitate

melting

When starting material X is treated with water ,it produces Y solution , which is used in white washing is Y , identify the X & Y from the following

X is quick lime, Y is washing soda

X is quick lime, Y is slaked lime

X is slaked lime, Y is washing soda

X is quick lime, Y is slow lime

Which of the following is correct gas evolved when a marble powder is heated in a dry test tube?

SO₃

H₂

CO₂

NO₂

which of the following is correct balanced chemical equation? When barium chloride reacts with aluminium sulphate produces barium sulphate and aluminium chloride

4BaCl_{2 +} Al₂(SO₄)₃ gives 3BaSO_{4 +}AlCl₃

4BaCl_{2 +} 2Al₂(SO₄)₃ gives 5BaSO_{4 +}2AlCl

3BaCl_{2 +} Al₂(SO₄)₃ gives 3BaSO_{4 +}2AlCl₃

3BaCl_{2 +} Al(SO₃)₄ gives 3BaSO_{4 +}2AlCl₂

10.

Which of the following answers will balance the equation below?
__K + __Br₂ --> __KBr

2, 1, 1

2, 3, 2

2, 1, 2

1, 2, 3

100 %

CHEMICAL REACTIONS AND EQUATIONS

Total questions: 10

Worksheet time: 10mins

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