Hydrogen gas is not evolved when metals react with: a) Water b) Nitric acid c) Dilute hydrochloric acid d) Both water and nitric acid Correct answer is option 'B'. Can you explain this answer?

Question

Answer

As per the option b says,

Hydrogen gas is not evolved when metals reacts with Nitric acid (HNO3). Because, Nitric acid is a strong Oxidising agent that can able to dissolve metal to form Metallic salt or simply the formation of Metal nitrates occurs. Due to the tendency of strong Oxidising agent for Nitric acid, it releases H2O and oxides of Nitrogen (NO, N2O, NO3).

But only two metals having a capacity to react even with dilute acids like Nitric acid to release Hydrogen gas. Those metals are:- Magnesium (Mg) and Manganese (Mn).

See the Reaction of Magnesium and Manganese with Nitric acid, they liberate Hydrogen gas and forms Metal nitrates. See the belowed chemical equation.

Mg + 2HNO3 -----> Mg(NO3)2 + H2↑.

Mn + 2HNO3 -----> Mn(NO3)2 + H2↑.

[Metal + Nitric acid ---> Metal nitrates (Salt) + Hydrogen gas].

Answer

When METAL react with NITRIC acid HYDROGEN gas is liberated.

Nitric acid is a very strong OXIDIZING agent.

So , it OXIDISES the HYDROGEN gas formed DURING the REACTION to form WATER and an oxide of NITROGEN.
..
........
... (NO,N2O,NO2 etc.).

The REACTION for it is:-

Zn+4HNO3→Zn(NO3)2+2NO2+2H2O

Exception:-
MAGNESIUM react with very DILUTE NITRIC ACID to liberate hydrogen gas.

The REACTION for it is:-

Mg+2HNO3→Mg(NO3)2+H2

Answer

When metal react with acid so hydrogen gas is evolved here nitric Acid (HNO3) and hydrochloric acid(HCl) are acid and water is neutral so when metal react with water hydrogen is not evolved.
Hope help u

Answer

Answer

When metal react with nitric acid it will not produce H2 gas bcz it is not a strong acid actually it is weak acid

Answer

Hydrogen gas is not evolved when a metal reacts with nitric acid because nitric acid is a strong oxidizing agent; it oxidizes the hydrogen to produce water.

When a metal reacts with nitric acid, no hydrogen gas is produced. It’s because HNO3 is a strong oxidizer.

It reduces itself to any of the nitrogen oxides (N2O, NO, NO2) after oxidizing the H2 released to water.

Magnesium (Mg) and manganese (Mn), on the other hand, react with very dilute HNO3 to produce H2 gas.

Answer

Because HNO3 IS STRONG AND GOOD OXIDIZING AZENT

Answer

With Hno3 because nitric is oxidising agent

Answer

Option B is correct as nitric acid (HNO3) is a very strong acid and is highly reactive.
Therefore , when it reacts with metals it oxidises the hydrogen to H2O(water) and itself is converted into oxides of nitrogen( NO2,...) .
But there are some exceptions like in the case of magnesium (Mg) and manganese (Mn) hydrogen gas is still released in the reaction with HNO3.

Answer

When hydrogen react with nitric acid it gives oxides of nitrogen

Answer

Because nitric acid is a strong oxidising agent and the hydrogen evolved convert to NO2,N2O, NO etc..

Answer

Explanation:

When metals react with different chemicals, the nature of the reaction and the products formed can vary. In the case of the given options, hydrogen gas is not evolved when metals react with nitric acid.

Reaction of metals with water:
- Reactivity of metals with water depends on their position in the reactivity series.
- Highly reactive metals like sodium and potassium react vigorously with water, producing hydrogen gas and a metal hydroxide.
- For example, when sodium reacts with water, it forms sodium hydroxide and hydrogen gas: 2Na + 2H₂O → 2NaOH + H₂.

Reaction of metals with dilute hydrochloric acid:
- Most metals react with dilute hydrochloric acid to produce hydrogen gas and a metal chloride.
- For example, when zinc reacts with hydrochloric acid, it forms zinc chloride and hydrogen gas: Zn + 2HCl → ZnCl₂ + H₂.

Reaction of metals with nitric acid:
- Nitric acid is a strong oxidizing agent and can undergo redox reactions with metals.
- Some metals, such as copper and silver, do not react with nitric acid due to the formation of a protective oxide layer on their surface.
- Other metals, such as magnesium and zinc, react with nitric acid to produce nitrogen dioxide gas, water, and a metal nitrate.
- For example, when magnesium reacts with nitric acid, it forms magnesium nitrate, water, and nitrogen dioxide gas: 3Mg + 8HNO₃ → 3Mg(NO₃)₂ + 4H₂O + 2NO₂.

Conclusion:
- When metals react with water, hydrogen gas is evolved.
- When metals react with dilute hydrochloric acid, hydrogen gas is evolved.
- However, when metals react with nitric acid, hydrogen gas is not evolved. Instead, the products formed are metal nitrates, water, and nitrogen dioxide gas.

Similar Class 10 Doubts

Hydrogen gas is not evolved when metals react with

Why magnesium and manganese react with very dilute HNO3 to evolve H2 gas whereas other metals doesnt react with nitric acid and form hydrogen gas as it is a strong oxidising agent?

Why does zinc liberate hydrogen gas when it reacts with dilute hydrochloric acid but copper does not ?

When dilute hydrochloride acid is added to granuleted zn placed in a test tube.the observation made (

y nitric acid reacts only with magnesium and manganese to produce hydrogen gas...it doesn't react like this with another metal ....I mean it doesn't produce H2 while react with other metals????

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