Physical Science

4 questions available

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All Physics 6 Chemistry 268 Elements & Compounds 4 Atoms & Molecules 6 Chemical Reactions 3 Acids & Bases Metals & Non-Metals 2 Scientific Laws 1
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Q1.Which of the following is not the Crystalline?

Medium
A Plastic
B Table Salt
C Diamond
D Quartz
Elements & Compounds PPSC 2026

Correct Answer: A

Plastic is amorphous, not crystalline, unlike table salt, diamond, and quartz.

Q2.Chemical Formula of Quartz is?

Hard
A SiO4
B SiO3
C SiO2
D SiO1
Elements & Compounds PPSC 2026

Correct Answer: C

Q3.Third most common gas that is found in the air we breathe is called:

Medium
A Hydrogen
B Neon
C Argon
D None of these
Elements & Compounds CSS 2026

Correct Answer: C

After nitrogen and oxygen, argon is the third most abundant gas in the air we breathe.

Q4.Besides chlorine, seawater contains traces of which element?

Easy
A Carbon
B Phosphorous
C Iodine
D None of these
Elements & Compounds PPSC 2021

Correct Answer: C

Besides chlorine (as part of dissolved salts), sea water contains trace amounts of Iodine, which is why seafood is a natural source of dietary iodine.