Download App

Chemical Reactions and Equations — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceChemical Reactions and Equations1 Mark
MCQ
Which of the  following equation is not correct?
  • A
    2AgBr(s)+ Sunlight → 2Ag(s) + Br2(g).
  • B
    FeSO4(s) + Cu(aq) → CuSO4(aq) + Fe(s).
  • C
    Pb(s) + CuCl2(aq) → PbCl2(aq) + Cu(s).
  • D
    Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s).
✓

Answer

  1. FeSO4(s) + Cu(aq) → CuSO4(aq) + Fe(s).

Explanation:

The equation FeSO4(s) + Cu(aq) → CuSO4(aq) + Fe(s) is incorrect.

Because fe is highly recative compared to Cu and hence Cu cannot replace Fe from its solution.

Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q-[Che-1M]" from Chemical Reactions and Equations→Chemical Reactions and Equations — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

Which of the following are exothermic processes?
  1. Reaction of water with quick lime.
  2. Dilution of an acid.
  3. Evaporation of water.
  4. Sublimation of camphor (crystals).
→
Which of the following is not a straight chain hydrocarbon?
→
Enzyme which converts starch into glucose is:
→
→
Sodium hydrogen carbonate when added to acetic acid evolves a gas. Which of the following statements are true about the gas evolved?
  1. It turns lime water milky.
  2. It extinguishes a burning splinter.
  3. It dissolves in a solution of sodium hydro.
  4. It has a pungent odour.
    →
    You have four test tubes, A, B, C and D containing sodium carbonate, sodium chloride, lime water and blue litmus solutions respectively. Out of these the material of which test tube/test tubes would be suitable for the correct test of acetic/ethanoic acid?
    →
    An unsaturated hydrocarbon having a triple covalent bond has 50 hydrogen atoms in its molecule. The number of carbon atoms in its molecule will be:
    →
    Wich of the following observations is true about dilute solution of acetic acid?
    →
    Which of the following are combination reactions?

    1. $2\text{KClO}_3\xrightarrow{\ \ \text{Heat}\ \ }2\text{KCl}\ +\ 3\text{O}_2$

    2. $\text{MgO}\ +\ \text{H}_2\text{O}\xrightarrow{ \ \ \ \ \ \ \ \ \ \ }\text{Mg(OH)}_2$

    3. $4\text{Al}\ +\ 3\text{O}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ }2\text{Al}_2\text{O}_3$

    4. $\text{Zn}\ +\ \text{FeSO}_4\xrightarrow{\ \ \ \ \ \ \ \ \ \ }\text{ZnSO}_4\ +\ \text{Fe}$

    →
    In order to prevent the spoilage of potato chips, they are packed in plastic bags in an atmosphere of:
    →