Cyanide or Macarthur Forrest Process

Q. Ine synthesise off phosphorus trichloride by mixing 12 gram of phosphorus with 35.0 gram of chlorine gas 45.2 gram of solid Phosphorus trichloride obtained 2P(s)+3Cl2(g) gives 2PCl3(s) (1) cl2 is the limiting reagent (2) percentage of yield of the reaction is 90 percentage (3) 10 gram of phosphorus is remained unreacted (4) all are right

Q. What is the hybridization of every element in HNO2?

Q. hybridization of N in NO2+ , NO3- and NH4+ are

Q. Consider metal(s) + oxygen(g) ------- metal oxides(s) Here the entropy decreases. give reasons.

Q. Complexes formed in the cyanide process are:

1. $\left[Au\right(CN{)}_2{]}^{-}$
2. $\left[Ag\right(CN{)}_2{]}^{-}$
3. $\left[Au\right(CN{)}_4{]}^{2-}$
4. $\left[Zn\right(CN{)}_4{]}^{2-}$

Q. The cyanide process of gold extraction involves leaching out gold from its ore with $C{N}^{-}$ in the presence of Q in water to form R. Subsequently, R is treated with T to obtain $Au$ and Z. Choose the correct option(s).

1. Z is $\left[Zn\right(CN{)}_4{]}^{2-}$
2. T is $Zn$
3. R is $\left[Au\right(CN{)}_4{]}^{-}$
4. Q is $O_2$

Q. In cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents are respectively.

Q. Cyanide process is used for the extraction of:

1. Au
2. Ag
3. Al
4. Both Au and Ag