Iron II Chloride

Q.

Which gas is produced when a mixture of iron filling and sulphur powder is treated with dilute sulphuric acid at room temperature? Which gas would be produced if the same mixture is heated strongly cooled and then treated with dilute sulphuric acid? What is the cause of difference in this property

Q.

does copper sulphate and blue vitriol are same ?

Q. Reaction between magnesium ribbon and oxygen gas to produce magnesium oxide is given by .

1. $Mg$ + $O$ → $MgO$
2. Mg + $O_2$ → ${MgO}_2$
3. $Mg$ + $O_2$ → $MgO$
4. $Mg$ + $O_2$ → ${Mg}_{2}O$

Q. At a certain temperature, the saturated solution of silver chloride has electrolytic conductivity of 1.12. The ionic conductances of Ag+ and Cl- ions at infinite dilution are 54.3 and 65.5 respectively at same temperature. Find solubility of Agcl at this temperature.

Q.

___ is insoluble in cold water but soluble in excess of ammonia solution.

Q.

nitrating mixture is obtained by mixing concentrated $HN{O}_3$ and concentrated $H_{2}S{O}_4$. The role of the latter - $H_{2}S{O}_4$ is:

1. To force $HN{O}_3$ to act as a base.

2. To suppress dissociation of $HN{O}_3$.

3. To produce $N{O}_2^{+}$ ions.

4. $H_{2}S{O}_4$ is a medium only; it is a spectator and doesn't partake in the reaction!

Q.

The brown ring in the detection of $N{O}_3^{-}$ ion is due to the formation of

1. $N{O}_2$

2. $N_2{O}_3$

3. $N_2{O}_5$

4. $FeS{O}_4.NO$

Q. When Iron scraps are heated in a current of Hydrogen Chloride, the product is $FeC{l}_2$. This compound is soluble in:

1. Alcohol
2. Ether
3. Water
4. THF

Q. Which is not easily soluble in water?

1. $H_2$
2. $O_2$
3. $S{O}_2$
4. $C{O}_2$
5. none of the above

Q.

Anhydrous ferric chloride is prepared by:

1. Heating hydrated ferric chloride at a high temperature in a stream of air.

2. Heating metallic iron in a stream of dry chlorine gas.

3. Reaction of ferric oxide with hydrochloric acid.

4. Reaction of metallic iron with hydrochloric acid.

Q. In general, hydogen gas reacts with metals to form respective metal hydoxide.

1. True
2. False

Q. In general, hydogen gas reacts with metals to form respective metal hydoxide.

1. True
2. False

Q. Choose the solution with lowest pH value:

1. $C{H}_{3}COONa$
2. $Ca(OH{)}_2$
3. $CaC{O}_3$
4. $CaC{l}_2$