Understanding chemical reactions

Understanding chemical reactions

KG - Professional Development

18 Qs

quiz-placeholder

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Understanding chemical reactions

Understanding chemical reactions

Assessment

Quiz

Chemistry

KG - Professional Development

Medium

Created by

Ali Alnakhli

Used 34+ times

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18 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Matter can undergo two types of reactions what are they ?

chemical and mental

physical and chemical

physical and mental

physical and directional

2.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

A physical change does not produce new substances ?

True

False

Answer explanation

A physical change does not produce new substances. The substances that exist before and after the change are the same, although they might have different physical properties

3.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

The starting substances and the substances produced have the same physical and chemical properties

True

False

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a chemical reaction?

A chemical reaction is a description of a reaction using element symbols and chemical formulas.

A chemical reaction is a process in which atoms bond to form a compound.

A chemical reaction is a process in which atoms of one or more substances rearrange to form one or more new substances.

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What are signs of a chemical reaction?

odor

state of matter

color

all of the above

6.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

If substances get warmer or cooler or if they give off light or sound, it is likely that a reaction has occurred.

true

false

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

you can be 100% sure, that a chemical reaction happens if the physical properties have changed

true

false

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