Carnalite has chemical formula__________________?
(A) KCI
(B) KCI.MgCl2.6H2O
(C) Na2B4O7.10H2O
(D) CaCO3.MgCO3
NaOH is named as caustic soda because________________?
(A) It corrodes the organic tissues
(B) It is used in soda water
(C) It reacts with chlorine gas
(D) It reacts with fats to form soap
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
Magnesium metal does not burn in the vessel containing_______________?
(A) N2
(B) O2
(C) N2 and O2
(D) Ne
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
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
Which one of the following alkali metals forms only normal oxide when it reacts with O2 ?
(A) Lithium
(B) Sodium
(C) Potassium
(D) Rubidium
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
In diaphragm cell hydrogen is discharged by the reduction of__________________?
(A) Water
(B) HCI
(C) Na+
(D) NaCl
Which one of the following carbonate is water insoluble ?
(A) Na2CO3
(B) K2CO3
(C) (NH4)2CO3
(D) CaCO3