Science students 8 chapter imp questions for chemistry ⚗️🧪


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🔬 Chapter: Materials – Metals and Non-Metals


📚 Important Questions:


1. Define the following terms:


Metal


Non-metal


Malleability


Ductility


Lustre


Sonorous




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2. Differentiate between metals and non-metals on the basis of:


Physical properties


Chemical properties


Uses




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3. Give reasons:


Why is aluminium used for making cooking utensils?


Why is copper used in electric wires?


Why is sulphur a non-metal?


Why are metals good conductors of heat and electricity?


Why is iodine a non-metal even though it is lustrous?




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4. Name the metal or non-metal:


That is liquid at room temperature


That is the best conductor of electricity


That is the poorest conductor of heat


That is used in thermometers


That is essential for plants/animals




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5. Write chemical reactions of:


Metal with oxygen (e.g., Magnesium + Oxygen)


Metal with water (e.g., Sodium with water)


Metal with acids (e.g., Zinc + HCl)


Non-metal with oxygen (e.g., Sulphur + Oxygen)




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6. What happens when:


A metal reacts with acid?


A non-metal reacts with acid?


Iron nails are dipped in copper sulphate solution? Explain the observation with chemical equation.




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7. Fill in the blanks:


Metals are ___ conductors of electricity.


Non-metals are ___ (ductile / non-ductile).


___ is a metal that can be cut with a knife.


The gas produced when metals react with acids is ___.




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8. Assertion and Reason type questions (for practice):


Assertion: Metals are malleable.

Reason: They can be drawn into wires.


(Correct answer: A is true, R is false – Ductility is drawing into wires)




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9. MCQs (Multiple Choice Questions):


Q. Which of the following is a non-metal?

a) Iron

b) Aluminium

c) Sulphur

d) Copper

Ans: c) Sulphur



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10. Long Answer Type:


Explain the reactivity of metals with oxygen, water and acids with examples.


How do metals and non-metals play different roles in our daily lives?



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By study tools 🌟 🔥 


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