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Chemistry XB

Dr.Rani.S.D, PGT (CHEMISTRY)

Date of submission: 28 June 2011

CHEMICAL REACTIONS AND EQUATIONS

(Home work book)

1. What is Rancidity? Write 4 methods to prevent it.

2. What is corrosion? What are the methods to prevent corrosion?

3. Name the substance oxidized reduced, oxidising agent, and reducing agent in the following reactions-.

2Al + 6HCl —-> 2 AlCl 3 + 3 H 2.

2H2S +SO 2 ——> 3 S + 2 H2 O.

4. Classify each of the following reaction as combination, decomposition, displacement or double displacement.

* 2KNO3 —> 2 KNO2 +O2.

* Z n + 2AgNO3 —>Zn (NO3)2+ 2Ag.

* Ni (NO3)2 +2NaOH—>Ni (OH)2 + 2 Na NO3.

* Zn + 2HCl —–> ZnCl2 + H2.

*2CuO —>2Cu + O2.

*Cl2 + 2NaBr—–>Br2 + 2NaCl.

*MgO + C—>CO + Mg.

* 2KClO3—> 2KCl+ 3O2

*CaO + H2O—> Ca (OH) 2

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