Which of the following statements is false?
 

1.	Ca2+ ions are important in blood clotting
2.	Ca2+ ions are not important in maintaining the regular beating of the heart
3.	Mg2+ ions are important in the green parts of plants
4.	Mg2+ ions form a complex with ATP

A compound that releases CO₂ most easily upon heating is?
1. $K_{2}C{O}_3$
2. $N{a}_{2}C{O}_3$
3. $MgC{O}_3$
4. $CaC{O}_3$

Which of the following biologically important ions is also a constituent of the sodium pump?

1. Ca²⁺
2. Mg²⁺
3. K⁺
4. Fe²⁺

Solubility of alkaline earth metal sulphates in water decreases in the sequence:

1. Mg > Ca > Sr >Ba
2. Ca > Sr > Ba > Mg
3. Sr > Ca > Mg > Ba
4. Ba > Mg > Sr > Ca

Which one of the following alkali metals forms only the normal oxide M₂O on heating in air?

1. Rb

2. K

3. Li

4. Na

 An active ingredient in bleaching powder that aids in the bleaching action is:

1.  $\mathrm{Ca}{\left(\mathrm{OCl}\right)}_2$

2.  ${\mathrm{CaO}}_2\mathrm{Cl}$

3.  ${\mathrm{CaCl}}_2$

4.  ${\mathrm{CaOCl}}_2$

Among the given options, what is the property of the alkaline earth metals that increases with their atomic number?
1. Solubility of their hydroxides in water
2. Solubility of their sulphates in water
3. Ionization energy
4. Electro-negativity

Which one of the following compounds is a peroxide?

1. $K{O}_2$

2. $Ba{O}_2$

3. $Mn{O}_2$

4. $N{O}_2$