Alcohols, \(\mathrm{NH}_{3}\) and \(\mathrm{H}_{2} \mathrm{O}\) all react with sodium but kerosene does not react.
CHXI10:THE S-BLOCK ELEMENTS
315881
Assertion : Alkaline earth metals have lower densities than alkali metals. Reason : Atomic radii of alkaline earth metals are smaller than that of corresponding alkali metals.
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:
Alkaline earth metals have higher densities than alkali metals.
CHXI10:THE S-BLOCK ELEMENTS
315882
The melting and boiling points of alkali metals decrease with the rise in atomic number due to weakening of
1 covalent bonding
2 ionic bonding
3 van der Waal's attraction
4 metallic bonding
Explanation:
As the size increases, the metallic bonding decreases.
CHXI10:THE S-BLOCK ELEMENTS
315883
Which of the following has density greater than water?
1 \(\mathrm{Li}\)
2 \(\mathrm{Na}\)
3 \(\mathrm{K}\)
4 \(\mathrm{Rb}\)
Explanation:
\(\mathrm{Li}, \mathrm{Na}, \mathrm{K}\) are lighter than water but \(\mathrm{Rb}\) is heavier than water.
Alcohols, \(\mathrm{NH}_{3}\) and \(\mathrm{H}_{2} \mathrm{O}\) all react with sodium but kerosene does not react.
CHXI10:THE S-BLOCK ELEMENTS
315881
Assertion : Alkaline earth metals have lower densities than alkali metals. Reason : Atomic radii of alkaline earth metals are smaller than that of corresponding alkali metals.
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:
Alkaline earth metals have higher densities than alkali metals.
CHXI10:THE S-BLOCK ELEMENTS
315882
The melting and boiling points of alkali metals decrease with the rise in atomic number due to weakening of
1 covalent bonding
2 ionic bonding
3 van der Waal's attraction
4 metallic bonding
Explanation:
As the size increases, the metallic bonding decreases.
CHXI10:THE S-BLOCK ELEMENTS
315883
Which of the following has density greater than water?
1 \(\mathrm{Li}\)
2 \(\mathrm{Na}\)
3 \(\mathrm{K}\)
4 \(\mathrm{Rb}\)
Explanation:
\(\mathrm{Li}, \mathrm{Na}, \mathrm{K}\) are lighter than water but \(\mathrm{Rb}\) is heavier than water.
Alcohols, \(\mathrm{NH}_{3}\) and \(\mathrm{H}_{2} \mathrm{O}\) all react with sodium but kerosene does not react.
CHXI10:THE S-BLOCK ELEMENTS
315881
Assertion : Alkaline earth metals have lower densities than alkali metals. Reason : Atomic radii of alkaline earth metals are smaller than that of corresponding alkali metals.
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:
Alkaline earth metals have higher densities than alkali metals.
CHXI10:THE S-BLOCK ELEMENTS
315882
The melting and boiling points of alkali metals decrease with the rise in atomic number due to weakening of
1 covalent bonding
2 ionic bonding
3 van der Waal's attraction
4 metallic bonding
Explanation:
As the size increases, the metallic bonding decreases.
CHXI10:THE S-BLOCK ELEMENTS
315883
Which of the following has density greater than water?
1 \(\mathrm{Li}\)
2 \(\mathrm{Na}\)
3 \(\mathrm{K}\)
4 \(\mathrm{Rb}\)
Explanation:
\(\mathrm{Li}, \mathrm{Na}, \mathrm{K}\) are lighter than water but \(\mathrm{Rb}\) is heavier than water.
NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXI10:THE S-BLOCK ELEMENTS
315880
Sodium is usually kept under
1 alcohol
2 kerosene oil
3 ammonia
4 water
Explanation:
Alcohols, \(\mathrm{NH}_{3}\) and \(\mathrm{H}_{2} \mathrm{O}\) all react with sodium but kerosene does not react.
CHXI10:THE S-BLOCK ELEMENTS
315881
Assertion : Alkaline earth metals have lower densities than alkali metals. Reason : Atomic radii of alkaline earth metals are smaller than that of corresponding alkali metals.
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:
Alkaline earth metals have higher densities than alkali metals.
CHXI10:THE S-BLOCK ELEMENTS
315882
The melting and boiling points of alkali metals decrease with the rise in atomic number due to weakening of
1 covalent bonding
2 ionic bonding
3 van der Waal's attraction
4 metallic bonding
Explanation:
As the size increases, the metallic bonding decreases.
CHXI10:THE S-BLOCK ELEMENTS
315883
Which of the following has density greater than water?
1 \(\mathrm{Li}\)
2 \(\mathrm{Na}\)
3 \(\mathrm{K}\)
4 \(\mathrm{Rb}\)
Explanation:
\(\mathrm{Li}, \mathrm{Na}, \mathrm{K}\) are lighter than water but \(\mathrm{Rb}\) is heavier than water.
