NCERT Activity 3.11 Class 10 Science Explanation

 Here you will find NCERT Activity 3.11 Class 10 Science Explanation that belongs to Chapter 3 Metals and Non-metals. After reading Solutions of chapter 3 Metals and Non-metals, you will be able to understand activity 3.11.

NCERT Activity 3.11 Class 10 Science Explanation

Activity 3.11 Class 10 Science

· Collect all the metal samples except sodium and potassium again. If the samples are tarnished, rub them clean with sandpaper.

Caution: Do not take sodium and potassium as they react vigorously even with cold water.

· Put the samples separately in test tubes containing dilute hydrochloric acid.

·   Suspend thermometers in the test tubes, so that their bulbs are dipped in the acid.

·     Observe the rate of formation of bubbles carefully.

·     Which metals reacted vigorously with dilute hydrochloric acid?

·     With which metal did you record the highest temperature?

· Arrange the metals in the decreasing order of reactivity with dilute acids.

Observations and Conclusion:

(i)         Mg reacts most vigorously followed by Al, Zn, and then Fe.

(ii)  Copper did not react at all so no bubbles were seen and the temperature remained unchanged.

(iii)   Temperature increased in cases of all the metals that react with dilute acid showing that the reactions are exothermic.

(iv)   The rise of temperature is maximum in the case of magnesium.

(v) The order of reactivity with dilute HCl is Mg > Al > An > Fe > Cu

Chemical Reaction of Metals with acid

Mg + 2HCl →MgCl₂ +H₂

2Al + 6HCl→ 2AlCl₃ + 3H₂

Zn + 2HCl→ZnCl₂ + H₂

 

Related Topics - 

1. Next activity - Activity 3.12

2. Previous activity -Activity 3.10

3. Solution of Chapter 3 Metals and Non-metals

4. MCQ Questions of Chapter 3

5. Extra Questions of Chapter 3

6. Solutions of Class 10 Science all chapters