9th Class Chemistry Chapter 3 Online MCQ Test With Answers PDF English Medium (Periodic Table and Periodicity of Properties)

Chemistry 9th Class English Medium Unit 3 Online Test

Sr. #	Questions	Answers Choice
1	Octet rule is	Attainign of eight electrons in its valence shell Discription of eight electrons Pictur eof electronic configuration Pattern of electronic configuration
2	Whcih of the following is not true about the formationof Na₂S	Each sodium atom loses one electron Sodium forms cation Each sulphur atom gains one electron Sulphur form anion
3	Whcih of the following atoms obey duplet rule.	O<sub>2</sub> Cl<sub>2</sub> H<sub>2</sub> Li<sub>2</sub>
4	Hydrogen and Helium follow.	Octet rule Triple rule Duplet rule None of these
5	Every atom has a natural tendency to accommodate electrons in its valence shell	2 or 6 2 or 4 2 or 8 2 or 10
6	Noble gases are non -reactive, because they do not.	Gain electrons Lose electrons Share electrons All of these
7	All the noble gases have their valence electrons.	Incomplete Partialy filled Completely filled None of the above
8	Attaining two electrons in the valence shell is called.	Octet rule Duplet rule Triplet rule All of these
9	Atoms achieve stability by attainign electonic configuration of.	Alkali metals Coinage metals Inert Gases Alkaline earth metals
10	Which among of the followign has a double covalent bond.	Ethane Methane Acetylene Ethylene
11	Whcih compound contains both covalent and ionic bonds.	MgCl<sub>2</sub> PCl5 NH<sub>4</sub>Cl CaO
12	Which ionic compound has the highest melting point.	RbCl KCl LiCl NaCl