Borax is used as a cleansing agent because on dissolving in water it gives
alkaline solution
acidic solution
bleaching solution
basic solution.
Which of the following organo - silicon compound on hydrolysis will give a three dimensional silicone ?
R3SiCl
RSiCl3
SiCl4
R2SiCl2
The energy gaps (Eg) between valence band and conduction band for diamond, silicon and germanium are in the order
Eg (diamond) > Eg (silicon) > Eg (germanium)
Eg (diamond) <Eg (silicon) <Eg (germanium)
Eg (diamond) = Eg (silicon)= Eg (germanium)
Eg (diamond)> Eg (germanium)> Eg (silicon).
Assertion: Silicones are hydrophobic in nature.
Reason: Si-O- Si linkages are moisture sensitive.
If both assertion and reason are true and reason is the correct explanation of the assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
If assertion is true, but reason is false.
Both assertion and reason are false statements.
Assertion : Borax bead test is not suitable for Al(III).
Reason : Al2O3 is insoluble in water.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
B.
If both assertion and reason are true but reason is not the correct explanation of assertion.
Borax bead test is not suitable for Al(III) because it is oxidising as well as reducing flame. It is colourless in both hot as well as cold. Alumina is insoluble in water as they exist in hydrated form like Al2O3, 2H2O2, Al2O3.H2O etc.