Chemistry 9th Class English Medium Online Test With Answers

image
image
image

Chemistry 9th Class English Medium Online Test

Sr. # Questions Answers Choice
1 Noble gases are non -reactive, because they do not. Gain electrons Lose electrons Share electrons All of these
2 All the noble gases have their valence electrons. Incomplete Partialy filled Completely filled None of the above
3 Attaining two electrons in the valence shell is called. Octet rule Duplet rule Triplet rule All of these
4 Atoms achieve stability by attainign electonic configuration of. Alkali metals Coinage metals Inert Gases Alkaline earth metals
5 Which among of the followign has a double covalent bond. Ethane Methane Acetylene Ethylene
6 Whcih compound contains both covalent and ionic bonds. MgCl<sub>2</sub> PCl5 NH<sub>4</sub>Cl CaO
7 Which ionic compound has the highest melting point. RbCl KCl LiCl NaCl
8 Which metal has the lowest melting point? Li Na Rb K
9 Keeping in view the intermolecular forces of attraction, indicate which compound has the highest boiling point H<sub>2</sub>S HF NH<sub>3</sub> H<sub>2</sub>O
10 Which form of carbon is used as a lubricant? Coal Diamond Charcoal Graphite
11 Which of the following bond s is expected to b the weakest. Cl-Cl<sup>-</sup> C-C F-F O -O
12 Why is H2Oa liquid while H2S is a gas? Becuase in waer, the atomic size of oxygen in smaller than that of Sulphur Because water can easily freeze into ice Because water is a polar compound ad tere exists strong forces of attrction betwene its molecules Because H<sub>2</sub>O molecule is lighter than H<sub>2</sub>S
Download This Set
×