Deliquescence and Alkaline Earth Metal Halides

Q. Of the following the commonly used in a laboratory desiccator is

1. dry NaCl
2. none
3. anhy.
4. anhy

Q. Choose the correct statement(s):

1. $BeC{O}_3$ is kept in the atmosphere of $C{O}_2$ since, it is least thermally stable
2. $Be$ dissolves in an alkali solution forming $\left[Be\right(OH{)}_4{]}^{2-}$
3. $Be{F}_2$ forms complex ion with $NaF$ in which $Be$ goes with cation
4. $Be{F}_2$ forms complex ion with $NaF$ in which $Be$ goes with anion

Q.

Dehydration of hydrates of halides of calcium, barium and strontium i.e., $CaC{l}_2.6H_{2}O,BaC{l}_2.2H_{2}O,SrC{l}_2.2H_{2}O,$
can be achieved by heating these become wet on keeping in the air. Which of the following statements. Is correct about these halides?
(a) Act as dehydrating agent
(b) Can absorb mositure from air
(c) Tendency to form hydrate decrease from calcium to barium
(d) All of the above

Q.

Identify the correct formula of halides of alkaline earth metals from the following .
(a) $BaC{l}_2.2H_{2}O$ (b) $BaC{l}_2$ (c) $CaC{l}_2.6h_{2}O$ (d) $SrC{l}_2.4H_{2}O$

Q. Of the following the commonly used in a laboratory desiccator is

1. none
2. dry NaCl
3. anhy
4. anhy.

Q. Among the alkaline earth metals, the element forming predominantly covalent compound is:

1. Barium
2. Beryllium
3. Strontium
4. Calcium

Q. Among the alkaline earth metals, the element forming predominantly covalent compound is:

1. Barium
2. Beryllium
3. Strontium
4. Calcium

Q. Among the alkaline earth metals, the element forming predominantly covalent compound is:

1. Barium
2. Beryllium
3. Strontium
4. Calcium

Q. Among the alkaline earth metals, the element forming predominantly covalent compound is:

1. Barium
2. Beryllium
3. Strontium
4. Calcium

Q. Which of these is/are methods of charging?

1. Charging by friction
2. Charging by induction
3. Charging by rotation
4. Charging by motion