316921
\(\mathrm{Pb}\) is constituent of following alloy
1 Solder
2 Bronze
3 Elektron
4 Duralumin
Explanation:
Solder is an alloy of \(\mathrm{Pb}(50 \%)+\mathrm{Sn}(50 \%)\)
CHXI11:THE P-BLOCK ELEMENTS
316922
Assertion : Bending of Sn produces sound, phenomenon being known as tin cry. Reason : Cooling tin below \(15.2^{\circ} \mathrm{C}\), it changes to grey powder.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Below \(15.2^{\circ} \mathrm{C}\), it changes to grey powder known as \(\alpha\)-tin. On bending, tin produces cracking sound, this is called tin cry. So, option (2) is correct.
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CHXI11:THE P-BLOCK ELEMENTS
316921
\(\mathrm{Pb}\) is constituent of following alloy
1 Solder
2 Bronze
3 Elektron
4 Duralumin
Explanation:
Solder is an alloy of \(\mathrm{Pb}(50 \%)+\mathrm{Sn}(50 \%)\)
CHXI11:THE P-BLOCK ELEMENTS
316922
Assertion : Bending of Sn produces sound, phenomenon being known as tin cry. Reason : Cooling tin below \(15.2^{\circ} \mathrm{C}\), it changes to grey powder.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Below \(15.2^{\circ} \mathrm{C}\), it changes to grey powder known as \(\alpha\)-tin. On bending, tin produces cracking sound, this is called tin cry. So, option (2) is correct.