Boron is non-netal whereas A1 is metal. It is due to_______________________?
(A) Small size
(B) High nuclear charge
(C) Both A and B
(D) No authorized justification yet
Ozonolysis of benzene produces___________________?
(A) Glycol
(B) Glyoxal
(C) Vicinal diol
(D) Both B & C
The metal which is used in thermite process because of its activity is____________________?
(A) iron
(B) copper
(C) aluminium
(D) zinc
Substance which is found in dried up lakes of Tibet and California is_______________?
(A) Tincal
(B) Boric acid
(C) Calcium carbonate
(D) Colemanite
Boron in soil has been considered micronutrient for_________________?
(A) Soil porocity
(B) Proper growth of plants
(C) Alkalinity of soil
(D) All
Which of the following will decompose to produce litharge_________________?
(A) Pb2O
(B) Pb3O4
(C) PbO2
(D) All of the above
If temperature of gallium arsenide is increased then its conductivity will___________________?
(A) decrease
(B) increase
(C) remains constant
(D) first decreases then increases
The coloured glassy mass in borax bead test is due to the formation of___________________?
(A) metal borate
(B) metal meta borate
(C) metal boride
(D) metal silicate