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	Which metal has the lowest melting point?	Li Na Rb K
2	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
3	Which form of carbon is used as a lubricant?	Coal Diamond Charcoal Graphite
4	Which of the following bond s is expected to b the weakest.	Cl-Cl<sup>-</sup> C-C F-F O -O
5	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
6	Which element is capable of forming all the three types of bonds, covalent coordinate covalent or ionic.	Carbon Silicon Magnesium Oxygen
7	When molten copper and olten zinc are mixed together , they give rise to a new substnce called brass. Predict what type of bond is formed between copper and zinc.	Ionic bond Coordinate Covalent bond Metallic bond Covalent Bond