A. As nitrometer
B. To remove air bubbles from molten metal
C. To produce alloy
D. As insulator
A. 26%
B. 27%
C. 37%
D. <2.6%
Orthoboric acid is 2.6% soluble in water at 40?C and ___________at 107°C. Read More »
Chemistry Mcqs, Group III A and IVA Elements A. 4
B. 2
C. 1
D. 6
A. 1s2 2s2 2p3
B. 1s2 2s2 2p6 3s2 3p1
C. 1s2 2s2 2p4
D. 1s2 2s2 2p6 3s2 3p6 4s2 3d1
Which electronic configuration corresponds to an element of group IIIA ? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. Acidic oxide
B. Basic oxide
C. Amphoteric oxide
D. It does not exists
Aluminium oxide is_________________? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. Heat resistant
B. Low melting
C. Used to prepare chemical garden
D. Green in colour
Special features of borate glass is that it is_________________? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. More soluble in cold water
B. More soluble in hot water
C. Insoluble in water
D. Soluble only in organic solvents
Borax is a white crystalline solid and it is_________________? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. Molecular addition compounds
B. Molecular crystals
C. Semiconductors
D. Ionic compounds
One of the outstanding features of boron is its ability to form__________________? Read More »
Chemistry Mcqs, Group III A and IVA Elements A. Small size
B. High nuclear charge
C. Both A and B
D. No authorized justification yet
Boron is non-netal whereas A1 is metal. It is due to_______________________? Read More »
Chemistry Mcqs, Group III A and IVA Elements