EASY
10th CBSE
IMPORTANT
Earn 100

Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in the reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can he identify the gas produced. Write chemical equations for both the reactions.

Important Questions on Metals And Non-Metals

EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 7
When a metal X is treated with cold water, it gives a basic salt Y with molecular formula XOH (Molecular mass = 40) and liberates a gas Z, which easily catches fire. Identify X, Y and Z and also write the reaction involved.
EASY
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 8
Explain the following: Reactivity of Al decreases if it is dipped in HNO3
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?