FREE CHEMISTRY AND STUDY GAMES ABOUT

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FREE CHEMISTRY AND STUDY GAMES ABOUT

SUBSTANCES AND STUFF EXAM QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -64 Questions and Answers -format set of multiple-choice -Expert- Explanation Question 1: Is a tablet being crushed into powder a chemical or physical change?

Answer:

Physical: Shape

Question 2: Is air a pure substance or a homogenous/heterogeneous mixture?

Answer:

Homogeneous (all looks the same except with pollen, etc.)

Question 3: Is grain being ground into flour a chemical or physical change?

Answer:

Physical: Shape

Question 4: A substance made up of more than one kind of atom chemical bonded together is called...

Answer:

A compound

Question 5: A substance made of only one chemical is called...

Answer:

A pure substance Question 6: Which of the types of matter can vary in composition between samples?

Answer:

Only mixtures can vary, because pure substances, compounds and elements all have the same ratios of elements in order to still be considered part of the original material.

Question 7: Is a goose roasting a chemical or physical change?

Answer:

Chemical: Color, Gas

Question 8: Is silver blackening a chemical or physical change?

Answer:

Chemical: Color

Question 9: Is oil burning a chemical or physical change?

Answer:

Chemical: Gas, Light

Question 10: What kind of changes can be used to separate mixtures?

Answer:

Physical

Question 11: Is cider fermenting a chemical or physical change?

Answer:

Chemical: Color, Gas

Question 12: Is glass a pure substance or a mixture?

Answer:

Pure substance (compound) (but reinforced glass is a mixture w/ boron)

Question 13: Is paint a pure substance or a homogenous/heterogeneous mixture?

Answer:

Homogeneous if latex, heterogeneous if oil

Question 14: Is a nail being magnetized a chemical or physical change?

Answer:

Physical: Well...not chemical...

Question 15: Is salt dissolving in water a chemical or physical change?

Answer:

Physical: Shape/Phase (S to L)

Question 16: Is carbon an element or a compound?

Answer:

Element (on periodic table)

Question 17: Is salt a pure substance or a homogenous/heterogeneous mixture?

Answer:

Pure substance (NaCL) (but table salt can be different because of iodine and drying agents)

Question 18: Is TNT exploding a chemical or physical change?

Answer:

Chemical: Light, Gas

Question 19: Is aluminum foil an element or a compound?

Answer:

Element (on periodic table) Question 20: Is sodium bicarbonate fizzing in acid a chemical or physical change?

Answer:

Chemical: Gas

Question 21: Is sugar a pure substance or a homogenous/heterogeneous mixture?

Answer:

Pure substance (it has a formula but I'm not looking it up...)

Question 22: Is gold foil a pure substance or a mixture?

Answer:

Pure substance (element)

Question 23: Is granite a pure substance or a homogenous/heterogeneous mixture?

Answer:

Heterogeneous (that's why it looks all flecked, etc.)

Question 24: Is water boiling a chemical or physical change?

Answer:

Physical: Phase (L to G)

Question 25: Is wood rotting a chemical or physical change?

Answer:

Chemical: Color, Gas (?)

Question 26: A substance made up of two or more elements not bonded together is called...

Answer:

A mixture

Question 27: Is food being digested a chemical or physical change?

Answer:

Chemical: Color...

Question 28: Is gasoline evaporating a chemical or physical change?

Answer:

Physical: Phase (L to G)