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Acetophenone is a_____________________?
A. Ether B. Ketone C. Aldehyde D. Ester Submitted by :- Jamil Ahmed
Which of the following will decompose to produce litharge_________________?
A. Pb2O B. Pb3O4 C. PbO2 D. All of the above Submitted by :- Jamil Ahmed
If temperature of gallium arsenide is increased then its conductivity will___________________?
A. decrease B. increase C. remains constant D. first decreases then increases Submitted by :- Jamil Ahmed
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 Submitted by :- Jamil Ahmed
Boron is non metal while other elements of IIIA group are metals. This is because______________?
A. it has small size B. it has high nuclear charge C. it forms molecular addition compounds D. all of…
Silicon differ from silica by a group of__________________?
A. Ch3 B. OH C. OCH3 D. O2 Submitted by :- Jamil Ahmed
Because of its ability to combine with both oxygen and nitrogen aluminium metal is used_____________?
A. As nitro meter B. To remove air bubbles from molten metal C. To produce alloy D. As insulator Submitted…
Orthoboric acid is 2.6% soluble in water at 4?C and ___________at 17°C.
A. 26% B. 27% C. 37% D. <2.6% Submitted by :- Jamil Ahmed
In network of silica (SiO2) each silicon atom is surrounded by _____________ atoms of Oxygen ?
A. 4 B. 2 C. 1 D. 6 Submitted by :- Jamil Ahmed
Which electronic configuration corresponds to an element of group IIIA ?
A. 1s2 2s2 2p3 B. 1s2 2s2 2p6 3s2 3p1 C. 1s2 2s2 2p4 D. 1s2 2s2 2p6 3s2 3p6…