EASY
10th CBSE
IMPORTANT
Earn 100

Explain the following: Reactivity of Al decreases if it is dipped in HNO3

Important Questions on Metals And Non-Metals

EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 8
Explain the following: Carbon cannot reduce the oxides of Na or Mg
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 8
Explain the following: NaCl is not a conductor of electricity in the solid state whereas it conducts electricity in the aqueous solution as well as in molten state.
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 9
An element A reacts with water to form a compound B that is used in white washing. The compound B on heating forms an oxide C that on treatment with water gives back B. Identify A, B and C and give the reactions involved.
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 1
Name two metals that react violently with cold water. Write any three observations you would make, when such a metal is dropped in water. How would you identify the gas evolved, if any, during the reaction.
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 2
What is an "activity series" of metals? Arrange the metals Zn, Mg, Al, Cu and Fe in a decreasing order of reactivity.
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 2
What would you observe when you put :
(i) Some zinc pieces into blue copper sulphate solution?
(ii) Some copper pieces into green ferrous sulphate solution?
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 2
Name a metal that combines with hydrogen gas. Name the compound formed.
HARD
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 3

Sample pieces of five metals, A, B, C, D and E were added to the tabulated solutions separately. The results observed were as shown in the table below.

Metal Solution
FeSO4 CuSO4 ZnSO4 AgNO3 Al2SO43

 

Question Image
Based on the observations recorded in the table answer following questions
(i) Which is the most reactive metal?
(ii) Which is the least reactive metal?
(iii) What would be observe if metal D were added to the solution of copper (II) sulphate?
(iv) What would be observed if metal E were added to a solution of iron (II) sulphate?
(v) Arrange the metals A, B, C, D and E in the order of their decreasing reactivity.