Advertisements
Advertisements
Question
An acidic oxide is produced by the element:
(a) Na
(b) C
(c) Ca
(d) H
Advertisements
Solution
(b) C
Because C is a non-metal, its oxide CO2 is an acidic oxide.
APPEARS IN
RELATED QUESTIONS
Write equations for the reactions of calcium and potassium with water.
Write the chemical reaction when iron reacts with dilute H2SO4.
Write the electron-dot structures for sodium, oxygen and magnesium.
Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
From amongst the metals sodium, calcium aluminium, copper and magnesium, name the metal:
(i) which reacts with water only on boiling, and
(ii) another which does not react even with steam.
Write equation for the reaction of magnesium with oxygen.
Fill in the following blank with suitable word:
Calcium is a ................. reactive metal than sodium.
What happens when calcium reacts with chlorine? Write an equation for the reaction which takes place
Why does aluminium not react with water under ordinary conditions?
Can we keep sodium immersed under water? Why?
What is the action of water on sodium ? Write equation of the chemical reaction involved.
The elements whose oxides can turn phenolphthalein solution pink are:
(a) Na and K
(b) K and C
(c) Na and S
(d) K and P
You are given a solution of AgNO3. Which of the following do you think cannot displace Ag from AgNO3solution?
(a) Magnesium
(b) Zinc
(c) Gold
(d) Copper
The least reactive metal among the following is:
(a) sodium
(b) silver
(c) copper
(d) lead
The elements whose oxides can turn litmus solution blue are:
(a) carbon and sulphur
(b) sodium and carbon
(c) potassium and magnesium
(d) magnesium and sulphur
The elements whose oxides can turn litmus solution red are:
(a) lithium and sodium
(b) copper and potassium
(c) carbon and hydrogen
(d) phosphorus and sulphur
In a solution of lead acetate, a strip of metal M was dipped. After some time, lead from the solution was deposited on the metal strip. Which metal is more reactive, M or lead?
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.
Which one among the following is an acidic oxide?
