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Class 10 Science Chapter 3 Assertion and Reason Questions - Metals and Non-metals

Q1:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): When a piece of copper metal is added to dilute sulphuric acid, the solution turns blue.

Reason (R): Copper reacts with dilute sulphuric acid to form blue copper (II) sulphate solution.

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Q2:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion (A): Metals are sonorous.

Reason (R): They are generally brittle in the solid state; they break into pieces when hammered.

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Q3:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion (A): Gas bubbles are observed when sodium carbonate is added to dilute hydrochloric acid.

Reason (R): Carbon dioxide is given off in the reaction.

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Q4:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Directions: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion (A): In alumino thermite process, the metals like iron melts due to the heat evolved in the reaction.

Reason (R): The reaction is:

Fe2O3 + 2Al → Al2O3 + 2Fe

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Q5:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion (A): Usually the sulphide ore is converted to oxide before reduction.

Reason (R): Reduction of oxides occurs easier.

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Q6:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion (A): A mineral is called ore, when metal is extracted from it conveniently and economically.

Reason (R): All ores are minerals but all minerals are not ores.

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Q7:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion (A): While the extraction of copper, one of the steps involved is

Cu2S + 2Cu2 O → 6Cu + SO2

Reason (R): In this reaction Cu2S is the reducing agent whereas Cu2O is the oxidising agent.

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Q8:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself:Assertion (A): In the metallurgy of Al, purified Al2O3 is mixed with Na3AlF6 or CaF2.

Reason (R): It lowers the melting point of the mixture and brings conductivity.

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Q9:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:

Assertion: Different metals have different reactivities with water and dilute acids.

Reason: Reactivity of a metal depends on its position in the reactivity series.

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Q10:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion : Gas bubbles are observed when sodium carbonate is added to dilute hydrochloric acid

Reason : Carbon dioxide is given off in the reaction.

View Solution

Q11:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself:Assertion: Metals have the quality of reflecting light from their surface and can be polished.
Reason: Non-metals are not usually lustrous.
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Q12:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion : Usually the sulphide ore is converted to oxide before reduction.

Reason : Reduction of oxides occurs easier.

View Solution

Q13:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion : Iron pyrite is not useful in the extraction of Fe.

Reason : SO2 polluting gas is produced during extraction.

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Q14:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion : Zinc carbonate is heated strongly in the presence of air to form zinc oxide and carbon dioxide.

Reason : Calcination is the process in which a carbonate ore is heated strongly in the absence of air to convert into metal oxide.

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Q15:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion : In the metallurgy of Al, purified Al2O3 is mixed with Na3AlF6 or CaF2.

Reason : It lowers the melting point of the mixture and brings conductivity.

View Solution

Q16:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion : Gold is isolated from other impurities by the Arndt forrest cyanide process.

Reason : The cyanide which is used here dissolve all possible impurities.

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Q17:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion : Magnesium chloride is an ionic compound.

Reason : Metals and non-metals react by mutual transfer of electrons.

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Q18:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion : Zinc can easily displace Copper on reacting with a solution of copper sulphate.

Reason : Copper is more reactive metal as compared to Zinc.

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Q19:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself: Assertion : Zinc oxide amphoteric in nature.

Reason : Zinc oxide reacts with both acids and bases.

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Q20:

Question for Assertion & Reason Type Questions: Metals and Non-metals
Try yourself:Assertion : Bronze is an alloy of lead and tin.

Reason : Alloys are a heterogeneous mixture of metals with other metals and non-metals.

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