Hydrogen and its Compounds - Competitive Exam Level
Q. What type of bond is formed between hydrogen and chlorine in HCl?
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A.
Ionic bond
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B.
Covalent bond
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C.
Metallic bond
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D.
Hydrogen bond
Solution
HCl is formed by a covalent bond between hydrogen and chlorine, where they share electrons.
Correct Answer: B — Covalent bond
Q. Which of the following compounds is a strong acid?
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A.
H2O
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B.
H2SO4
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C.
H2O2
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D.
NH3
Solution
H2SO4 (sulfuric acid) is a strong acid, while H2O is neutral, H2O2 is a weak oxidizer, and NH3 is a weak base.
Correct Answer: B — H2SO4
Q. Which of the following is a reducing agent?
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A.
H2O2
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B.
H2
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C.
HCl
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D.
H2SO4
Solution
Hydrogen gas (H2) acts as a reducing agent by donating electrons in redox reactions.
Correct Answer: B — H2
Q. Which of the following statements about hydrogen is true?
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A.
It is a metal
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B.
It has the highest electronegativity
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C.
It can form cations
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D.
It is always diatomic
Solution
Hydrogen can form cations (H+) in reactions, especially in acid-base chemistry.
Correct Answer: C — It can form cations
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