Reactivity Towards Halogens

Q.

Which reaction will occur at the fastest rate?

1. 

2. 

3. 

4. 

Q. in which of the following element +3 oxidation state is more stable than +5 a] P b] As c] N d] Bi

Q. 4BCl3(g) + 3LiAlH4(s)  2B2H6(g) + 3LiCl(s) + 3 AlCl3 (s), here in B2H6, oxidation number of B is -3 but in NaBH4, it is +3, how? When should we take oxidation number of H as +1 and when as -1?

Q. 5 moles of Na2S2O3 losses 10 moles of the electron. What will be the oxidation number of sulphur?

Q. 33 What is the oxidation number of S in Na2S2O3? Explain using its struture

Q. The stability of dihalides of Si, Ge.Sn, and Pb increases steadily in the sequence :

1. $Ge{X}_2<Si{X}_2<Sn{X}_2<Pb{X}_2$
2. $Si{X}_2<Ge{X}_2<<Pb{X}_2<Sn{X}_2$
3. $Si{X}_2<Ge{X}_2<Sn{X}_2<Pb{X}_2$
4. $Pb{X}_2<Ge{X}_2<Sn{X}_2<Si{X}_2$

Q.

Which of the following is/are correct for group 14 elements?

1. The (general) tendency for catenation decreases down the group

2. They all form oxides of the form $E{O}_2$

3. The ability of an element to form p$\pi -$p$\pi$ bond with itself increases down the group

4. The stability of the di-haldies is in the order $C{X}_2<Si{X}_2<Ge{X}_2<Sn{X}_2<Pb{X}_2$

Q. Which of the following statements is incorrect regarding the compounds of carbon family elements?

1. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6
2. The stability order of group 14 dihalides is $Si{X}_2>Ge{X}_2>Sn{X}_2>Pb{X}_2$
3. The order of boiling points of hydrides of group 14 elements is $C{H}_4<Si{H}_4<Ge{H}_4<Sn{H}_4$
4. $MeSiC{l}_3$ on hydrolysis and subsequent condensation will produce $\left(Me\right)Si{\left(OH\right)}_3$

Q. to find oxidation no of central bromine atom in Br_3O_{

Q. Solve this :

Q. When potassium permanganate is titrated against ferrous ammonium sulphate, the equivalent weight of ferrous ammonium sulphate is :

(a) M (b) M/2 (c) M/5 (d) M/3

Q. The C-X bond energy order for the carbon tetra halides is:

1. $C{I}_4>CB{r}_4>CC{l}_4>C{F}_4$
2. $CC{l}_4>CB{r}_4>C{I}_4>C{F}_4$
3. $C{F}_4>CC{l}_4>CB{r}_4>C{I}_4$
4. None of above

Q. Solve this

Are the oxidation state and covalency of Al in [AlCl(H₂O)₃]²⁺ same . Give reasons also for the answer with explanation of how to find the oxidation state and covalency of an element in a compound.

Q. How to calculate oxidation number of two unknown atoms in a compound? For e.g. I dont know oxidation no of Carbon and Iron atom in FeC2O4. How to calculate now?

Q. The oxidation number of Pt in [Pt(C2H4)Cl3] is

Q. why TlCl does not undergo disproportionation