Class 7 Science MCQs - Chapter 17
Physical and Chemical Changes Trivia Questions & Answers PDF Download - 24
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The Physical and chemical changes Trivia Questions and Answers PDF (Physical and Chemical Changes Quiz Answers PDF e-Book) download Ch. 17-24 to study Grade 7 Science Course. Practice Physical Changes MCQ PDF, Physical and Chemical Changes Quiz Questions and Answers for homeschool certification courses. The Physical and Chemical Changes Trivia App Download: Grade 7 Science Study App [Free] for physical changes, making ammonia, chemical changes, solids liquids and gases test prep for online schools.
The Quiz: When the liquid is cooled down, it changes into solid, this process is known as; "Physical and Chemical Changes" App APK Download with answers: freezing, melting, condensation, and sublimation for homeschool certification courses. Practice Physical Changes MCQ Questions, download Kindle eBook (Free Sample) for distance learning.
Physical and Chemical Changes Test Questions and Answers PDF Download: MCQ 24
When the liquid is cooled down, it changes into solid, this process is known as
- melting
- freezing
- condensation
- sublimation
To make high temperature for formation of ammonia, the substance which is used, is
- steel
- iron
- aluminum
- copper
One or more new substances are formed due to
- physical change
- chemical change
- biological change
- state variation
The first thing that happens during chemical reaction is that
- a new substance is formed
- a substance is reversed to its components
- energy is given out
- atoms remain same
The density of liquids is
- lower than solids but higher than gases
- lower than solids and gases both
- higher than solids and gases both
- higher than solids but lower than gases
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Physical and Chemical Changes MCQ Book Questions
- Name of physicist who discovered nucleus of atom was
- Sodium ion has
- As compare to air, sound travels faster in
- A force which occurs when two surfaces come in contact and slows down motion while acting in
- Formula that shows number and kind of atoms which a substance of a molecule contained, is known as