Advertisements
Advertisements
Question
The least reactive metal among the following is:
(a) sodium
(b) silver
(c) copper
(d) lead
Solution
(b) silver
Because silver lies below other metals in the reactivity series.
APPEARS IN
RELATED QUESTIONS
The reaction of an iron nail with copper sulphate solution is ........... reaction.
(a) Combination
(b) Displacement
(c) Double displacement
(d) Decomposition
A student added few pieces of aluminium metal to two test tubes A and B containing aqueous solutions of iron sulphate and copper sulphate. In the second part of her experiment, she added iron metal to another test tubes C and D containing aqueous solutions of aluminium sulphate and copper sulphate.
In which test tube or test tubes will she observe colour change? On the basis of this experiment, state which one is the most reactive metal and why.
Explain the following reaction with the help of a balanced chemical equation:
Magnesium reacts with hot water.
Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.
Zinc oxide is a metal oxide. Which of the following term best describes the nature of zinc oxide:
(a) an acidic oxide
(b) a basic oxide
(c) an amphoteric oxide
(d) a neutral oxide
An element E reacts with water to form a solution which turns phenolphthalein solution pink. The element E is most likely to be:
(a) S
(b) Ca
(c) C
(d) Ag
What is the cause of chemical bonding (or chemical combination) of atoms of elements?
Choose the correct alternative and rewrite the following:
Which of the following is lue in colour?
Explain the following:
Reactivity of aluminium decrease if it is dipped in nitric acid.
Where does the metal aluminium, used in the process, occurs in the reactivity series of metals?