Class 11 Exam > Class 11 Questions > Which of the following statements is false?a)...
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Which of the following statements is false?
- a)Alkali metals form covalent bonds with oxygen.
- b)Alkali metals have relatively low first ionization energies
- c)Alkali metals forms oxides that act as basic anhydrides.
- d)Alkali metals usually have a +1 oxidation state
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Which of the following statements is false?a)Alkali metals form covale...
Lithium, sodium and potassium all react vigorously with water. Hydrogen gas bubbles off and, in the case of potassium, this burns with a lilac flame. The metal hydroxide is formed which is a strong alkali. Alkali metals need to be stored under oil to prevent them reacting with the oxygen and water vapour in the air.
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Most Upvoted Answer
Which of the following statements is false?a)Alkali metals form covale...
False Statement: Alkali metals form covalent bonds with oxygen.
Explanation:
Alkali metals refer to the elements present in Group 1 of the periodic table, including lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). These metals are highly reactive due to their low ionization energies, which means they readily lose their outermost electron to form a positively charged ion.
Alkali metals have relatively low first ionization energies:
The first ionization energy is the energy required to remove the outermost electron from an atom in its gaseous state. Alkali metals have relatively low ionization energies, which means it takes less energy to remove their outermost electron compared to other elements. This is due to their large atomic size and the shielding effect of inner electron shells. Therefore, statement b) is true.
Alkali metals form oxides that act as basic anhydrides:
When alkali metals react with oxygen, they form oxides. These oxides are ionic compounds consisting of metal cations and oxide anions. Alkali metal oxides are highly basic and react with water to form metal hydroxides. This property makes them act as basic anhydrides. Therefore, statement c) is true.
Alkali metals usually have a 1 oxidation state:
Alkali metals have a single valence electron, which they readily lose to achieve a stable electron configuration. This results in the formation of alkali metal ions with a 1+ charge. Therefore, statement d) is true.
Conclusion:
The false statement among the given options is a) Alkali metals form covalent bonds with oxygen. Alkali metals do not typically form covalent bonds with oxygen, but rather ionic bonds to form oxides.
Explanation:
Alkali metals refer to the elements present in Group 1 of the periodic table, including lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). These metals are highly reactive due to their low ionization energies, which means they readily lose their outermost electron to form a positively charged ion.
Alkali metals have relatively low first ionization energies:
The first ionization energy is the energy required to remove the outermost electron from an atom in its gaseous state. Alkali metals have relatively low ionization energies, which means it takes less energy to remove their outermost electron compared to other elements. This is due to their large atomic size and the shielding effect of inner electron shells. Therefore, statement b) is true.
Alkali metals form oxides that act as basic anhydrides:
When alkali metals react with oxygen, they form oxides. These oxides are ionic compounds consisting of metal cations and oxide anions. Alkali metal oxides are highly basic and react with water to form metal hydroxides. This property makes them act as basic anhydrides. Therefore, statement c) is true.
Alkali metals usually have a 1 oxidation state:
Alkali metals have a single valence electron, which they readily lose to achieve a stable electron configuration. This results in the formation of alkali metal ions with a 1+ charge. Therefore, statement d) is true.
Conclusion:
The false statement among the given options is a) Alkali metals form covalent bonds with oxygen. Alkali metals do not typically form covalent bonds with oxygen, but rather ionic bonds to form oxides.
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Which of the following statements is false?a)Alkali metals form covale...
Alkali metals always form ionic bonds.
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Which of the following statements is false?a)Alkali metals form covalent bonds with oxygen.b)Alkali metals have relatively low first ionization energiesc)Alkali metals forms oxides that act as basic anhydrides.d)Alkali metals usually have a +1 oxidation stateCorrect answer is option 'A'. Can you explain this answer?
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Solutions for Which of the following statements is false?a)Alkali metals form covalent bonds with oxygen.b)Alkali metals have relatively low first ionization energiesc)Alkali metals forms oxides that act as basic anhydrides.d)Alkali metals usually have a +1 oxidation stateCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 11.
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Which of the following statements is false?a)Alkali metals form covalent bonds with oxygen.b)Alkali metals have relatively low first ionization energiesc)Alkali metals forms oxides that act as basic anhydrides.d)Alkali metals usually have a +1 oxidation stateCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for Which of the following statements is false?a)Alkali metals form covalent bonds with oxygen.b)Alkali metals have relatively low first ionization energiesc)Alkali metals forms oxides that act as basic anhydrides.d)Alkali metals usually have a +1 oxidation stateCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of Which of the following statements is false?a)Alkali metals form covalent bonds with oxygen.b)Alkali metals have relatively low first ionization energiesc)Alkali metals forms oxides that act as basic anhydrides.d)Alkali metals usually have a +1 oxidation stateCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following statements is false?a)Alkali metals form covalent bonds with oxygen.b)Alkali metals have relatively low first ionization energiesc)Alkali metals forms oxides that act as basic anhydrides.d)Alkali metals usually have a +1 oxidation stateCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 11 tests.
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