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

Explain the given terms: Homopolymers

Give IUPAC name of :

Write the different oxidation states of iron

Distinguish between isothermal process and adiabatic process.

Explain, why lanthanum (Z = 57) forms La³⁺ ion, while cerium (Z = 58) forms Ce⁴⁺ ion?

Which one of the following oxidation state of Manganese is unstable?

(a) + 2

(b) + 4

(c) + 5

(d) + 7

What are the sources of Vitamin C and Vitamin K?

How are the following conversions carried out?

2-methylbutan-1-ol into 2 -methylbutanoic acid.

Write two uses of formaldehyde

Define isotonic solutions.

When KOH solution is added to potassium dichromate solution the colour of solution
changes to yellow, because _______

(A) chromate ion changes to dichromate ion

(B) dichromate ion changes to chromate ion

(C) oxidation number of chromium changes from + 6 to + 4

(D) oxidation number of chromium changes from + 4 to +6

But-1-ene on reaction with HCl in the presence of sodium peroxide yields _______.

IUPAC name of is C₆H₅ − CH₂ − C − CH₂ − CH₂ − CH₂ − CH₃ is _______

(A) 1-Phenylhexan-2-one

(B) 6-Phenylhexan-5-one

(C) 1-Benzylhexan-5-one

(D) Dodecan-5-one

How is nitromethane prepared from the following?

alkyl halide

How is nitromethane prepared from the following?

α-nitroalkene

How are polymers classified on the basis of polymerisation process?

Explain effects of lanthanoid contraction.

What are the consequences of lanthanoid contraction?

How does calcination differ from roasting?

Write resonating structures of ozone.