315852
Statement A : \({\rm{Be}}\) and \(\mathrm{Mg}\) do not impart characteristic colour to the flame. Statement B : Both Be and Mg have high ionization energy.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Due to high I.E., Be & Mg do not impart colour to the flame. So, the option (3) is correct.
CHXI10:THE S-BLOCK ELEMENTS
315853
Assertion : \(\mathrm{Mg}\) does not impart characteristic colours to the Bunsen-burner flame. Reason : Ionisation potential of \(\mathrm{Mg}\) is very high.
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:
Both assertion and reason are true and the reason is the correct explanation of the assertion.
CHXI10:THE S-BLOCK ELEMENTS
315854
A chloride dissolves appreciably in cold water. When placed on a platinum wire in Bunsen flame, no distinctive colour is noticed. The cation is
1 \(\mathrm{Mg}^{2+}\)
2 \(\mathrm{Ba}^{2+}\)
3 \(\mathrm{Pb}^{2+}\)
4 \(\mathrm{Ca}^{2+}\)
Explanation:
\(\mathrm{MgCl}_{2}\) is soluble in cold water but \(\mathrm{PbCl}_{2}\) is insoluble. Both \(\mathrm{Mg}^{2+}\) and \(\mathrm{Pb}^{2+}\) do not impart any colour to Bunsen flame.
CHXI10:THE S-BLOCK ELEMENTS
315855
For Group -2 elements, which one of the following trends is incorrect?
Density (in g/cc) order: \(\mathrm{Be}(1.84)>\mathrm{Mg}\) (1.74) \(>\mathrm{Ca}(1.55) < \mathrm{Sr}(2.63) < \mathrm{Ba}(3.59)[\mathrm{The}\) given values as per NCERT]
315852
Statement A : \({\rm{Be}}\) and \(\mathrm{Mg}\) do not impart characteristic colour to the flame. Statement B : Both Be and Mg have high ionization energy.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Due to high I.E., Be & Mg do not impart colour to the flame. So, the option (3) is correct.
CHXI10:THE S-BLOCK ELEMENTS
315853
Assertion : \(\mathrm{Mg}\) does not impart characteristic colours to the Bunsen-burner flame. Reason : Ionisation potential of \(\mathrm{Mg}\) is very high.
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:
Both assertion and reason are true and the reason is the correct explanation of the assertion.
CHXI10:THE S-BLOCK ELEMENTS
315854
A chloride dissolves appreciably in cold water. When placed on a platinum wire in Bunsen flame, no distinctive colour is noticed. The cation is
1 \(\mathrm{Mg}^{2+}\)
2 \(\mathrm{Ba}^{2+}\)
3 \(\mathrm{Pb}^{2+}\)
4 \(\mathrm{Ca}^{2+}\)
Explanation:
\(\mathrm{MgCl}_{2}\) is soluble in cold water but \(\mathrm{PbCl}_{2}\) is insoluble. Both \(\mathrm{Mg}^{2+}\) and \(\mathrm{Pb}^{2+}\) do not impart any colour to Bunsen flame.
CHXI10:THE S-BLOCK ELEMENTS
315855
For Group -2 elements, which one of the following trends is incorrect?
Density (in g/cc) order: \(\mathrm{Be}(1.84)>\mathrm{Mg}\) (1.74) \(>\mathrm{Ca}(1.55) < \mathrm{Sr}(2.63) < \mathrm{Ba}(3.59)[\mathrm{The}\) given values as per NCERT]
315852
Statement A : \({\rm{Be}}\) and \(\mathrm{Mg}\) do not impart characteristic colour to the flame. Statement B : Both Be and Mg have high ionization energy.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Due to high I.E., Be & Mg do not impart colour to the flame. So, the option (3) is correct.
CHXI10:THE S-BLOCK ELEMENTS
315853
Assertion : \(\mathrm{Mg}\) does not impart characteristic colours to the Bunsen-burner flame. Reason : Ionisation potential of \(\mathrm{Mg}\) is very high.
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:
Both assertion and reason are true and the reason is the correct explanation of the assertion.
CHXI10:THE S-BLOCK ELEMENTS
315854
A chloride dissolves appreciably in cold water. When placed on a platinum wire in Bunsen flame, no distinctive colour is noticed. The cation is
1 \(\mathrm{Mg}^{2+}\)
2 \(\mathrm{Ba}^{2+}\)
3 \(\mathrm{Pb}^{2+}\)
4 \(\mathrm{Ca}^{2+}\)
Explanation:
\(\mathrm{MgCl}_{2}\) is soluble in cold water but \(\mathrm{PbCl}_{2}\) is insoluble. Both \(\mathrm{Mg}^{2+}\) and \(\mathrm{Pb}^{2+}\) do not impart any colour to Bunsen flame.
CHXI10:THE S-BLOCK ELEMENTS
315855
For Group -2 elements, which one of the following trends is incorrect?
Density (in g/cc) order: \(\mathrm{Be}(1.84)>\mathrm{Mg}\) (1.74) \(>\mathrm{Ca}(1.55) < \mathrm{Sr}(2.63) < \mathrm{Ba}(3.59)[\mathrm{The}\) given values as per NCERT]
315852
Statement A : \({\rm{Be}}\) and \(\mathrm{Mg}\) do not impart characteristic colour to the flame. Statement B : Both Be and Mg have high ionization energy.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Due to high I.E., Be & Mg do not impart colour to the flame. So, the option (3) is correct.
CHXI10:THE S-BLOCK ELEMENTS
315853
Assertion : \(\mathrm{Mg}\) does not impart characteristic colours to the Bunsen-burner flame. Reason : Ionisation potential of \(\mathrm{Mg}\) is very high.
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:
Both assertion and reason are true and the reason is the correct explanation of the assertion.
CHXI10:THE S-BLOCK ELEMENTS
315854
A chloride dissolves appreciably in cold water. When placed on a platinum wire in Bunsen flame, no distinctive colour is noticed. The cation is
1 \(\mathrm{Mg}^{2+}\)
2 \(\mathrm{Ba}^{2+}\)
3 \(\mathrm{Pb}^{2+}\)
4 \(\mathrm{Ca}^{2+}\)
Explanation:
\(\mathrm{MgCl}_{2}\) is soluble in cold water but \(\mathrm{PbCl}_{2}\) is insoluble. Both \(\mathrm{Mg}^{2+}\) and \(\mathrm{Pb}^{2+}\) do not impart any colour to Bunsen flame.
CHXI10:THE S-BLOCK ELEMENTS
315855
For Group -2 elements, which one of the following trends is incorrect?
Density (in g/cc) order: \(\mathrm{Be}(1.84)>\mathrm{Mg}\) (1.74) \(>\mathrm{Ca}(1.55) < \mathrm{Sr}(2.63) < \mathrm{Ba}(3.59)[\mathrm{The}\) given values as per NCERT]
