Conductivity MP BP and Electronegativity (Group 2)

Q. The highest melting point among alkali metal is:

1. $Li$
2. $Na$
3. $K$
4. $Rb$

Q.

Among the alkaline earth metals, the element having the lowest melting point is:

1. Be

2. Mg

3. Ca

4. Ba

Q. Lake test of $A{l}^{3+}$ ion is based on adsorption of blue litmus on solid surface of

1. $A{l}_2(C{O}_3{)}_3$
2. $Al(OH{)}_3$
3. $AlC{l}_3$
4. $Al$ metal

Q. Lake test of $A{l}^{3+}$ ion is based on adsorption of blue litmus on solid surface of

1. $A{l}_2(C{O}_3{)}_3$
2. $Al(OH{)}_3$
3. $AlC{l}_3$
4. $Al$ metal

Q. An oxide which gives $H_2{O}_2$ on treatment with a dilute acid is:

1. $N{a}_2{O}_2$
2. $Pb{O}_2$
3. $Mn{O}_2$
4. $Ti{O}_2$

Q. The elements of group - 2 are called alkaline earth metals because

1. these are $s-$ block elements
2. they occur in earth's crust and form alkaline salts
3. their oxides are alkaline and occur in earth's crust
4. they are alkaline in nature

Q.

In view of their low ionization energies, the alkali metals are:

1. Weak reducing agents

2. Strong oxidizing agents

3. Weak oxidizing agents

4. Strong reducing agents