Which of the following oxide is amphoteric in nature?
It is because of inability of ns2 electrons of the valence shell to participate in bonding that (a) Sn2+ is oxidising while Pb4+ is reducing (b) Sn2+ and Pb2+ are both oxidising and reducing (c) Sn4+ is reducing while Pb4+ is oxidising (d) Sn2+ is reducing ...
Which among the following salt solutions is basic in nature? (1) Sodium acetate (2) Ammonium chloride (3) Ammonium sulphate (4) Ammonium nitrate
Aluminium is usually found in +3 oxidation stagte. In contarast, thallium exists in +1 and +3 oxidation states. This is due to : (1) lanthanoid contraction (2) lattice effect (3) diagonal relationship (4) inert pair effect
The one that is extensively used as a piezoelectric material is : (1) Quartz (2) Amorphous silica (3) Mica (4) Tridymite
Which of the following compound is most reactive in electrophilic aromatic substitution?
Among the following compounds how many are amphoteric in nature Be(OH)2, BeO, Ba(OH)2, Sr(OH)2 Numerical Value Type
Which of the following is an amphoteric hydroxide? (1) Sr(OH)2 (2) Ca(OH)2 (3) Mg(OH)2 (4) Be(OH)2
Which of the following statement is not true about glucose? (1) It is an aldopentose. (2) It is an aldohexose. (3) It contains five hydroxyl groups. (4) It is a reducing sugar.
Which of the following is a free radical substitution reaction? (1) Propene with HBr/(C6H5COO)2 (2) Benzene with Br2/AlCI3 (3) Acetylene with HBr (4) Methane with Br2/hv
Which of the following statement is NOT true about acid rain? (1) Its pH is less than 5.6 (2) It is due to reaction of SO2, NO2 and CO2 with rain water (3) Causes no damage to monuments like Taj Mahal (4) It is harmful for plants