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Chemical Reactions Unit Test A

Authored by Dawn Collins

Chemistry

9th - 12th Grade

Used 1+ times

Chemical Reactions Unit Test A
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24 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

A physical change...

Changes the physical properties of an object, but does not create a new substance.

Creates a new substance and cannot be undone.

2.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

A chemical change...

Changes the physical properties of an object, but does not create a new substance.

Creates a new substance and cannot be undone.

3.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Which of the following options provides evidence of a CHEMICAL change?

Wood is burned releasing ash and smoke

Rocks separate when soil is sifted

Water turns to ice when you put it in the freezer

Salt dissolves in water

4.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Which of the following examples provides evidence of a PHYSICAL change?

Wood is burned and releases ash and smoke

Iron rusts over time

When mixed, baking soda and vinegar form gas bubbles

A piece of paper changes shape when you rip it up

5.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

What did Rutherford discover about atoms?

An atom is always negatively charged.

An atom is mostly empty space, but has a dense positively charged center(nucleus).

An atom is always positively charged.

All particles will pass straight through gold foil with no change in path.

6.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

James Chadwick discovered the

neutron

proton

electron

nucleus

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The following is what type of reaction:
PbCl2 + AgNO3 → Pb(NO3)2 + AgCl

Synthesis

Decomposition

Single Displacement

Double Displacement

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