Addition of 2% gypsum in cement________________?
Addition of 2% gypsum in cement________________? A. Triggers hydration B. Triggers hydrolysisC. Prevents rapid hardening D. all of the above
Addition of 2% gypsum in cement________________? A. Triggers hydration B. Triggers hydrolysisC. Prevents rapid hardening D. all of the above
Which one can form complex ? A. Na B. CrC. Li D. K
Second ionization potential of alkali metals are very high due to_______________? A. being s-block elementsB. 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 O2D. Ne
Sodium is not observed in +2 oxidation state because of its__________________? A. high first ionization potentialB. 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 LithiumB. 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 PC. 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)2CO3D. CaCO3