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

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

(a) + 2

(b) + 4

(c) + 5

(d) + 7

Which of the following compounds is NOT prepared by the action of alcoholic NI₃ on alkyl halide?

(a) CH₃NH₂

(b) CH₃- CH₂- NH₂

(c) CH₃ - CH₂ - CH₂ - NH₂

(d) (CH₃)₃ C- NH₂

Which of the following compounds is NOT prepared by the action of alcoholic NI₃ on alkyl halide?

(a) CH₃NH₂

(b) CH₃- CH₂- NH₂

(c) CH₃ - CH₂ - CH₂ - NH₂

(d) (CH₃)₃ C- NH₂

Which of the following compounds is NOT prepared by the action of alcoholic NI₃ on alkyl halide?

(a) CH₃NH₂

(b) CH₃- CH₂- NH₂

(c) CH₃ - CH₂ - CH₂ - NH₂

(d) (CH₃)₃ C- NH₂

What are the sources of Vitamin C and Vitamin K?

Write the structure and IUPAC name of 'methyl-n-propyl ether'.

Write the structure and IUPAC name of 'methyl-n-propyl ether'.

Write the structure and IUPAC name of 'methyl-n-propyl ether'.

What is the action of hot HI on it?

What is the action of hot HI on it?

What is the action of hot HI on it?

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 _______.

3-Methylbutane-2-ol on heating with HI gives ______

3-Methylbutane-2-ol on heating with HI gives ______

3-Methylbutane-2-ol on heating with HI gives ______

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