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.
A
Both Assertion (A) and Reason (R) is false
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Correct Answer: A
When a piece of copper metal is added to dilute sulphuric acid, then it shows no reaction at normal temperature. It is because, copper reacts only with heated sulphuric ac to form blue copper (W) sulphate solution and reason is false as copper cannot displace hydrogen , as it is less reactive than it
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Q2:
MULTIPLE CHOICE QUESTION
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): Metals are sonorous. Reason (R): They are generally brittle in the solid state; they break into pieces when hammered.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: C
- Assertion (A) states that metals are sonorous, which is true. Sonority refers to the ability to produce a ringing sound when struck. - Reason (R) claims that metals are generally brittle and break when hammered, which is false. In reality, metals are malleable and ductile, meaning they can be hammered into shape without breaking. - Therefore, the correct answer is that assertion (A) is true but reason (R) is false.
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Q3:
MULTIPLE CHOICE QUESTION
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): Gas bubbles are observed when sodium carbonate is added to dilute hydrochloric acid. Reason (R): Carbon dioxide is given off in the reaction.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: A
Gas bubbles are observed when sodium carbonate is added to dilute hydrochloric acid as CO2 gas is released.
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Q4:
MULTIPLE CHOICE QUESTION
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
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: A
The alumino thermite process involves the reaction:
Fe2O3 + 2Al → Al2O3 + 2Fe
This reaction generates a significant amount of heat, which is:
Enough to melt iron
Suitable for applications like welding
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Q5:
MULTIPLE CHOICE QUESTION
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): Usually the sulphide ore is converted to oxide before reduction.
Reason (R): Reduction of oxides occurs easier.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: A
Usually the sulphide ore is converted to oxide before reduction as oxides are easier to reduce.
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Q6:
MULTIPLE CHOICE QUESTION
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): 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.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
Correct Answer: B
Minerals are naturally occurring chemical substances in the earth’s crust obtained by mining. But a mineral is called an ore only when the metal can be extracted from it conveniently and economically. Thus, all ores are minerals but all minerals are not ores.
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Q7:
Q8:
Q9:
MULTIPLE CHOICE QUESTION
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: Different metals have different reactivities with water and dilute acids.
Reason: Reactivity of a metal depends on its position in the reactivity series.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
E
Both Assertion and Reason are false.
Correct Answer: A
Both assertion (A) and reason (R) are true, with reason (R) correctly explaining assertion (A). The position of metals in the reactivity series determines their reactivity with water and acids. Metals higher in the series are more reactive.
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Q10:
Q11:
MULTIPLE CHOICE QUESTION
Try yourself: Assertion: Metals have the quality of reflecting light from their surface and can be polished. Reason: Non-metals are not usually lustrous.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
B
Assertion is correct but Reason is incorrect.
C
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
D
Both Assertion and Reason are incorrect.
E
None of these
Correct Answer: C
Metals have the quality of reflecting light from their surface and can be polished e.g., gold, silver, and copper. Non-metals are usually not lustrous, except iodine and diamond - the most lustrous of all the substances. But the reason is not the correct explanation of assertion.
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Q12:
MULTIPLE CHOICE QUESTION
Try yourself: Assertion : Usually the sulphide ore is converted to oxide before reduction.
Reason : Reduction of oxides occurs easier.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
E
Both Assertion and Reason are false.
Correct Answer: A
Both assertion (A) and reason (R) are true explanations of assertion (A). Usually the sulphide ore is converted to oxide before reduction as oxides are easier to reduce.
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Q13:
MULTIPLE CHOICE QUESTION
Try yourself: Assertion : Iron pyrite is not useful in the extraction of Fe.
Reason : SO2 polluting gas is produced during extraction.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
E
Both Assertion and Reason are false.
Correct Answer: A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A). Pyrite is composed of iron and sulphur. The sulphur content during extraction may contaminate the metal and reduce the strength.
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Q14:
MULTIPLE CHOICE QUESTION
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.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
E
Both Assertion and Reason are false.
Correct Answer: D
Assertion (A) is false but reason (R) is true.
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Q15:
MULTIPLE CHOICE QUESTION
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.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
E
Both Assertion and Reason are false.
Correct Answer: A
Both assertion (A) and reason (R) are true and reason explanation of assertion (A). In the metallurgy of aluminium, purified Al2O3 is mixed with Na3AlF3 or CaF2 which lowers the melting point of the mix and brings conductivity.
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Q16:
MULTIPLE CHOICE QUESTION
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.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
E
Both Assertion and Reason are false.
Correct Answer: C
Assertion (A) is true but reason (R) is false. The cyanide dissolves gold by forming a complex.
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Q17:
MULTIPLE CHOICE QUESTION
Try yourself: Assertion : Magnesium chloride is an ionic compound.
Reason : Metals and non-metals react by mutual transfer of electrons.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
E
Both Assertion and Reason are false.
Correct Answer: A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
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Q18:
MULTIPLE CHOICE QUESTION
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.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
E
Both Assertion and Reason are false.
Correct Answer: C
Assertion (A) is true but reason (R) is false.
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Q19:
MULTIPLE CHOICE QUESTION
Try yourself: Assertion : Zinc oxide amphoteric in nature.
Reason : Zinc oxide reacts with both acids and bases.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Assertion (A) is true but reason (R) is false.
D
Assertion (A) is false but reason (R) is true.
E
Both Assertion and Reason are false.
Correct Answer: A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
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Q20:
MULTIPLE CHOICE QUESTION
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.
A
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
B
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
C
Both Assertion and Reason are false.
D
Assertion (A) is true but reason (R) is false.
E
Assertion (A) is false but reason (R) is true.
Correct Answer: C
Correct answer is C. Both Assertion and Reason are false. An alloy is a homogeneous mixture containing two or more metals in it. Bronze is an alloy made by mixing copper (Cu) and tin (Sn).
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The document Assertion & Reason Type Questions: Metals and Non-metals is a part of the Grade 10 Course Chemistry for Grade 10.
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