HSC Science (Electronics) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

The half-lives of a first-order reaction are 1.19s at 313 K and 15.45s at 293 K. Calculate the energy of activation.

Write the preparation of viscose rayon.

The unit of rate constant of zero order reaction is ______.

According to Lowry-Bronsted concept, base is a substance which acts as ______.

What is the SI unit of molar conductivity?

Give the primary and secondary valencies of cobalt in the coordination compound [Co(NH₃)₆]Cl₃.

Find out the oxidation state of cobalt ions in the complex [Co(NH₃)₅Br]S0₄.

How is phenol (carbolic acid) prepared from aniline (diazotization)?

Identify the compo ds A and B in the following reactions:

\[\ce{A ->[Nitrating mixture] B ->[(i) Sn/cone. HCI][(ii) NaOH] Aniline}\]

Explain Swartz reaction.

Mention the res of the following solid:

Ice

Mention the res of the following solid:

CO₂

How will you prepare propanone (acetone) from Grignard reagent?

What are intermolecular forces of attraction involved in molecular crystals?

Name and draw structure of the repeating unit in natural rubber.

Write the structure of isoprene and the polymer obtained from it.

Write a structure of 2-Iodo-3 - methylpentane.

Calculate pH of 0.01 M NaOH.

Explain the determination of molar conductivity of a weak electrolyte at infinite dilution or zero concentration using Kohlrausch's law.

Which of the following does not have d⁰s⁰ configuration?