Chemistry Question Bank

An aqueous solution of boric acid is found to be weakly acidic in nature. This acidic character arises due to the following reasons.

H3BO3 is:

Boric acid H3BO3 and BF3 have the same number of elec- trons. The former is a solid and the latter is a gas. The reason is:

What happens when a mixture of cobalt oxide and borax is heated in a flame on a loop of platinum wire ?

Identify X and Y in the following reaction. NaBH 140ºC C H Cl BCl NH Cl X Y + ¾¾¾¾® ¾¾¾¾®

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)

Which of the following is incorrect statement? (NEET 2019)

The correct order of atomic radii in group 13 elements is (NEET 2018)

MF which one of the following elements is unable to form ion? (NEET 2018)

It is because of inability of ns2 electrons of the valence shell to participate in bonding that (NEET 2017)

The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration ? (NEET 2017)

Boric acid is an acid because its molecule (NEET 2016)

The basic structural unit of silicates is (NEET 2013)

Which of the following structure is similar to graphite? (NEET 2013)

Name the type of the structure of silicate in which one oxygen atom of [SiO4]4– is shared? (AIPMT 2011)

Which of the following is not hydrolysed easily? (OJEE 2010)

Which type of silicate is shown in the given figure (Guj. CET 2010)

Which of the following is not attacked by hot sodium hydroxide solution? (Manipal 2010)

Graphite is a good conductor of electricity. Its electrical conductivity is due to the fact that (CPMT 2010)

Chemical formula of phosgene is (AFMC 2010)

Inorganic benzene is (PMT 2010)

Borax is used as a cleansing agent because on dissolving in water, it gives (RPMT 2010)

BF3 is (RPMT 2010)