Class 10 Exam > Class 10 Questions > Which of the following metals does not displa...
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Which of the following metals does not displace H2 gas from dilute HCl or dilute H2SO4?
- a)Mg
- b)Cu
- c)Zn
- d)Al
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which of the following metals does not displace H2 gas from dilute HCl...
The correct option is b) copper.
Copper does not reacts with dilute sulphuric acid, liberating hydrogen because copper is lower in the electromotive series than hydrogen. A more reactive element can displace a less reactive element from its salt solution. The metals above hydrogen in the activity series react with dilute sulphuric acid and dilute hydrochloric acid to liberate hydrogen. The metals below hydrogen in the activity series cannot do that. Copper fall below hydrogen in series.
Copper does not reacts with dilute sulphuric acid, liberating hydrogen because copper is lower in the electromotive series than hydrogen. A more reactive element can displace a less reactive element from its salt solution. The metals above hydrogen in the activity series react with dilute sulphuric acid and dilute hydrochloric acid to liberate hydrogen. The metals below hydrogen in the activity series cannot do that. Copper fall below hydrogen in series.
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Which of the following metals does not displace H2 gas from dilute HCl...
Explanation:
When a metal reacts with an acid like dilute hydrochloric acid (HCl) or sulfuric acid (H2SO4), it displaces hydrogen gas (H2) from the acid. This is because metals have a higher reactivity than hydrogen and can displace it from its compounds.
Let's analyze each option to determine which metal does not displace hydrogen gas from dilute HCl or dilute H2SO4.
a) Mg (Magnesium)
Magnesium is an active metal and can displace hydrogen gas from dilute acids. When magnesium reacts with dilute HCl or H2SO4, it forms magnesium chloride (MgCl2) or magnesium sulfate (MgSO4) and hydrogen gas is evolved.
b) Cu (Copper)
Copper is a less reactive metal and cannot displace hydrogen gas from dilute acids. It does not react with dilute HCl or H2SO4. Therefore, copper does not displace hydrogen gas from these acids.
c) Zn (Zinc)
Zinc is an active metal and can displace hydrogen gas from dilute acids. When zinc reacts with dilute HCl or H2SO4, it forms zinc chloride (ZnCl2) or zinc sulfate (ZnSO4) and hydrogen gas is evolved.
d) Al (Aluminum)
Aluminum is also an active metal and can displace hydrogen gas from dilute acids. When aluminum reacts with dilute HCl or H2SO4, it forms aluminum chloride (AlCl3) or aluminum sulfate (Al2(SO4)3) and hydrogen gas is evolved.
Therefore, out of the given options, copper (Cu) is the metal that does not displace hydrogen gas from dilute HCl or dilute H2SO4.
When a metal reacts with an acid like dilute hydrochloric acid (HCl) or sulfuric acid (H2SO4), it displaces hydrogen gas (H2) from the acid. This is because metals have a higher reactivity than hydrogen and can displace it from its compounds.
Let's analyze each option to determine which metal does not displace hydrogen gas from dilute HCl or dilute H2SO4.
a) Mg (Magnesium)
Magnesium is an active metal and can displace hydrogen gas from dilute acids. When magnesium reacts with dilute HCl or H2SO4, it forms magnesium chloride (MgCl2) or magnesium sulfate (MgSO4) and hydrogen gas is evolved.
b) Cu (Copper)
Copper is a less reactive metal and cannot displace hydrogen gas from dilute acids. It does not react with dilute HCl or H2SO4. Therefore, copper does not displace hydrogen gas from these acids.
c) Zn (Zinc)
Zinc is an active metal and can displace hydrogen gas from dilute acids. When zinc reacts with dilute HCl or H2SO4, it forms zinc chloride (ZnCl2) or zinc sulfate (ZnSO4) and hydrogen gas is evolved.
d) Al (Aluminum)
Aluminum is also an active metal and can displace hydrogen gas from dilute acids. When aluminum reacts with dilute HCl or H2SO4, it forms aluminum chloride (AlCl3) or aluminum sulfate (Al2(SO4)3) and hydrogen gas is evolved.
Therefore, out of the given options, copper (Cu) is the metal that does not displace hydrogen gas from dilute HCl or dilute H2SO4.
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Which of the following metals does not displace H2 gas from dilute HCl or dilute H2SO4?a)Mgb)Cuc)Znd)AlCorrect answer is option 'B'. Can you explain this answer?
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