Advertisements
Advertisements
Question
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
Advertisements
Solution
(c) an amphoteric oxide
Zinc oxide can react with both acids and bases to form salt and water.
APPEARS IN
RELATED QUESTIONS
Why is sodium kept immersed in kerosene oil?
Write the electron-dot structures for sodium, oxygen and magnesium.
Show the formation of Na2O by the transfer of electrons.
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
Name the metal which has been placed at the top of the reactivity series.
Which of the following elements would yield a basic oxide.
Na, S, C, K, H
Which of the following elements would yield a neutral oxide?
Na, S, C, K, H
How do metals react with hydrogen? Explain with an example.
What is the action of water on aluminium ? Write equation of the chemical reaction involved.
Write one reaction in which aluminium oxide behaves as a basic oxide and another in which it behaves as an acidic oxide.
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
Which non-metal has been placed in the reactivity series of metals?
An acidic oxide is produced by the element:
(a) Na
(b) C
(c) Ca
(d) H
An element X forms two oxides XO and XO2. The oxide XO has no action on litmus solution but oxide XO2 turns litmus solution red.
(a) What is the nature of oxide XO?
(b) What is the nature of oxide XO2?
(c) Would you call element X a metal or a non-metal? Give reason for your choice.
(d) Can you give an example of element like X?
CuSO4(aq) + Fe(s) → FeSO4(aq) + Cu(s)
FeSO4(aq) + Zn(s) → ZnSO4(aq) + Fe(s)
On the basis of the above reactions, indicate which is most reactive and which is least reactive metal out of zinc, copper and iron.
Name a metal which does not react with cold as well as hot water but reacts with steam.
Write a chemical equation to illustrate the use of aluminium for joining cracked railway lines.
Calcium floats over water during the reaction with water. Give reason.
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following.
