Fe2O3(s) + 2 AI (s) ➝ 2Fe (s) + Al2O3 (s) The reaction is interpreted as
Fe203is getting oxidised and AI is getting reduced
Fe2.O3 is getting reduced and AI is getting oxidised
Only Fe2.03is oxidised
Only Al is oxidised
An example for a displacement reaction is
Fe2.03+ 3C ➝ 2 Fe + 3CO
2NaCI+ F2 ➝ 2NaF + Cl2
AgN03+ KCI ➝ AgCI + KN03
both B and C
The metal which can displace Ag from its salt solution is
Cu
Au
Fe
both A and C
Zincgranulesare added to blue coloured CuS04 solution ina test tube. Which of the following observations is correct?
Blue colour of the solution fades
Blue colour of the solution intensifies
No change in the colour of the solution
Blue colour of the solution changes to green
In the reaction 3Mg + S02 ➝ 2MgO + MgS, Mg acts as
an oxidising agent
reducing agent
oxidising as well as reducing agent
It is not a redox reaction
Identify the correct colour change in the following displacement reaction. Fe (s) + CuS04 (aq) ➝ FeS04 (aq) + Cu (s)
Blue to white
Blue to black
Blue to pale green
White to blue
Compound (X) on thermal decompositon produces a brown coloured gas (X) is
Fe2(S04)3
Mg C03
NaN03
Pb(NO3)2
White washing with slaked lime gives a shiny appearance to the walls after two to three days. It is due to the formation of
CaO
CaCO3
Ca(OH)2
None of the above
Metal X forms a chloride Y,which is used in black and white photography. Yturns grey in sunlight, to give X and a gas Z. X, Yand Z respectively are
AgCI. Ag, Cl2
AgCl, Cl2.Ag
Ag, AgCI. Cl2
Cl2, Ag, AgCI
The reaction between methane and oxygen can be represented as CH4(g) + 202(g) ➝ CO2(g) + 2H2O + Heat In which of t.he following type(s), the above reaction can be classified? i. Displacement reaction ii. Exotherraic reaction iii. Combusion iv. Combination reaction
(i) and (ii)
(i), (ii) and (iii)
(ii) and (iii)
(ii), (iii) and (iv)
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