Aluminium Chloride

Q. $Al{F}_3$ is soluble in HF only in presence of KF. It is due to the formation of

1. $Al{H}_3$
2. $K\left[Al{F}_{3}H\right]$
3. $K_3\left[Al{F}_3{H}_3\right]$
4. $K_3\left[Al{F}_6\right]$

Q.

In $A{l}_{2}C{l}_6$, which statement is incorrect-

1. Six Al - Cl bonds are of same length and two of different length

2. The angle Cl - Al - Cl is ${110}^0$ and ${93}^0$

3. The angle Al - Cl - Al is ${87}^0$

4. Four Al - Cl bonds are of same length and two of different length

Q. Which one of the following is the correct statement?

1. $B_2{H}_6.2N{H}_3$ is known as ${}^{\prime }inorganicbenzen{e}^{\prime }$.
2. Boric acid is a protonic acid
3. Beryllium exhibits coordination number of six
4. Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase

Q.

$AlC{l}_3$ exists as a dimer

1. True

2. False

Q. Which of the following is/are method(s) to prepare aluminium chloride?

1. Passing dry $HCl$ gas over heated aluminium
2. Heating a mixture of alumina and carbon under chlorine gas at atmospheric pressure
3. Dissolving aluminium metal in dilute hydrochloric acid
4. Dissolving aluminium hydroxide in dilute hydrochloric acid