19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
When aluminium hydroxide dissolves in NaOH solution, the product is:
The main factor responsible for weak acidic nature of B—F bonds in BF3 is:
Which of the following compounds are formed when boron trichloride is treated with water?
Boron is unable to form BF - ions due to
The element which exists in liquid state for a wide range of temperature and can be used for measuring high temperature is
Which of the following oxides is acidic in nature ?
Which of the following hydroxides is acidic ?
When aluminium is heated with conc. H2SO4
Aluminium does not react with:
Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because:
Electropositive charcter for the elements of group 13 follows the order
The reason behind the lower atomic radius of Ga as compared to Al is
Which one of the statements is incorrect for aluminium metals?
Aluminium exhibits +3 oxidation state. As we move down the group, +1 oxidation state gets more stable. This is a consequence of
Group 13 elements show +1 and +3 oxidation states. Relative stability of +3 oxidation state may be given as (a) Tl Ga Al B In + + + + + > > > > (b) B Al Ga In Tl + + + + + > > > > (c) Al Ga Tl In B + + + + + > > > > (…
The stability of +1 oxidation state increases in the se- quence:
Ionisation enthalpy i ( H kJ mol ) - D for the elements of Group 13 follows the order
Trimethylammonia is pyramidal whereas trisilylammonia is a planar molecule. Why ?
Specify the coordination geometry around and hybrid- ization of N and B atoms in 1:1 complex of BF3 and NH3:
Which of the following is a Lewis acid ?
The shapes and hybridisation of BF3 and BH- respectively are
The shapes and hybridisation of BF3 and BH- respectively are
Identify the correct statements from the following: (NEET 2020)
Which of the following compounds is used in cosmetic surgery? (Odisha NEET 2019)
Which of the following species is not stable? (NEET 2019)