In diaphragm cell hydrogen is discharged by the reduction of__________________?

A. Water
B. Hci
C. Na+
D. Nacl

Gypsum is applied to the soil as a source of________________?

A. Ca and p
B. S and p
C. Ca and s
D. We could not apply

Which one of the following alkali metals forms only normal oxide when it reacts with O2 ?

A. Lithium
B. Sodium
C. Potassium
D. Rubidium

Which one of the following pairs shown diagonal relationship in the periodic table ?

A. Sodium and lithium
B. Lithium and magnesium
C. Lithium and beryllium
D. Boron and beryllium

Sodium is not observed in +2 oxidation state because of its__________________?

A. High first ionization potential
B. High second ioniation potential
C. High ionic radius
D. High electronegativity

Magnesium metal does not burn in the vessel containing_______________?

A. N2
B. O2
C. N2 and o2
D. Ne

Second ionization potential of alkali metals are very high due to_______________?

A. Being s-block elements
B. Inert gas configurations
C. Ns1 electronic configuration
D. Being metals

Which one is least ionic in nature and decompose on heating ?

A. Lioh
B. Naoh
C. Koh
D. Csoh

The word Alkali means__________________?

A. Base
B. Basic salt
C. Ashes
D. Spirit

Which element is necessary for normal leaf development ?

A. Si
B. Ba
C. Mg
D. Ca