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When Al is added to KOH solution
2KOH+2Al+2H2O→2KAlO2+3H2
Which metal is protected bya layer of its own oxide
Boron forms covalent compound due to
Which of the following product is formed when SiF4 reacts with water?
In reaction with water, SiF4(like SiCl4) gets hydrolysed to form H4SiO4 (silicic acid).
SiF4+4H2O→ Si(OH)4 or H4SiO4+4HF
Which of the following metals burn in air at high temperature with the evolution of heat ?
4Al+3O2→2Al2O3ΔH=-ve
Non-oxide ceramics can be
Ceramics are inorganic , non-metallic, solid minerals.They come in a variety of forms, including silicates(silica, SiO2 with metal oxides), oxides (oxygen and metals), carbides (carbon and metals), aluminates(alumina, Al2O23 with metal oxides) and nitrides.The given ceramics are B4C (carbides), SiC (carbides),Si3N24(nitrides) and thus, none of these is an oxide . All of these are non-oxide ceramics.
In the reaction B2O7+C+Cl2→ACO.The A is
B2O7+3C+3Cl2→2BCl3+3CO
Aluminium reacts with caustic soda to form:
Aluminium reacts with caustic soda to form sodium meta aluminate
2Al + 2NaOH + 6H2O→2NaAlO2.2H2O + 3H2
Which of the following properties of aluminium makes it useful for food packaging ?
Due to the low density of aluminium it is useful for food packaging.
Borax is used as cleansing agent because on dissolving in water it gives
Borax is Na2B24O7.10H2O. It gives alkaline solution ondissolution in water as it is asalt of strong base and weak acid.
Na2B4O7+ 7H2O→4H3BO3+ 2NaOH