An element with molar mass 2.7 x 10^-2 kg mol forms a cubic unit cell with edge length 405 pm. If its density is 2.7 x 10³ kg m^-3, What is the nature of the cubic unit cell?

A first order reaction completes 25% of the reaction in 100 mins. What are the rate constant and half life values of the reaction?

Derive Henderson - Hasselbalch equation

Derive a relationship between dissociation constant K_a and molar conductivity \({ \Lambda }_{ m }\)

Explain the various chemical methods by which colloids can be prepared.

An organic compound (A) C₆H₆O gives violet colour with neutral FeCl₃ solution. With NH₃ in the presence of anhydrous ZnCI₂, (A) gives (B) (C₆H₇N). (A) with dimethyl sulphate gives (C) (C₇H₈O). What are (A), (B) and (C)? Explain the reactions.

An organic compound (A) of molecular formula C₇H₈ on oxidation with air and in presence of V₂O₅ to form (B) of molecular formula C₇H₆O. (B) on reduction with lithium aluminium hydride to form (C) of molecular formula C₇H₈O. Identify (A), (B) and (C) and explain the reactions.

How do primary, secondary and tertiary amines react with nitrous acid?

Explain the classification of hormones.

Explain the classification of polymers based on their structure and mode of synthesis.