Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Chemistry

Which of the following polymer can be formed by using the following monomer unit?

Which of the following monomers form biodegradable polymers?

(i) 3-hydroxybutanoic acid + 3-hydroxypentanoic acid

(ii) Glycine + amino caproic acid

(iii) Ethylene glycol + phthalic acid

(iv) Caprolactum

Convert the following: 

Propanenitrile to ethanol.

[Ni(H₂O)₆]²⁺ (aq) is green in colour whereas [Ni(H₂O)₄ (en)]²⁺ (aq)is blue in colour, give reason in support of your answer.

In a coordination entity, the electronic configuration of the central metal ion is t_2g³ e_g¹ 

Draw the crystal field splitting diagram for the above complex.

Complete the following:

\[\ce{C6H5NO2 ->[Sn/HCl] A ->[Br2/H2O] B ->[NaNO2/HCl][273 - 278 K] C ->[HBF4][Δ] D}\]

KMnO₄ is coloured due to ______.

The CFSE of [CoCl₆]^3– is 18000 cm^–1 the CFSE for [CoCl₄]^– will be ______.

Give reason for the following:

During the electrophilic substitution reaction of haloarenes, para-substituted derivative is the major product.

Give reasons for the following observation:

Aniline is acetylated before nitration reaction.

Give reasons for the following observation:

Aniline does not react with methyl chloride in the presence of anhydrous AlCl₃ catalyst.

Write the reaction occurring at anode and cathode and the products of electrolysis of aq KCl.

Why \[\ce{HCl}\] should not be used for potassium permanganate titrations?

What is the effect of pH on dichromate ion solution?

Using crystal field theory, write the electronic configuration of d⁵ ion, if Δ₀ > P.

What is the spectrochemical series?

What is the difference between a weak field ligand and a strong field ligand?

What is crystal field splitting energy?

Why tryptophan is an essential amino acid?

Complete the following ionic equation:

\[\ce{Cr2O^{2-}7 + 2OH^- ->}\]