HSC Science (General) इयत्ता १२ वी - Maharashtra State Board Question Bank Solutions

10.0 grams of caustic soda when dissolved in 250 cm³ of water, the resultant gram molarity of solution is _______.

(A) 0.25 M

(B) 0.5 M

(C) 1.0 M

(D) 0.1 M

Classify the following solids into different types:

a. Ammonium phosphate

b. Brass

c. S₈ molecule

d. Diamond

In the following 

The compound ‘B’ is _______.
(A) Propan–1–amine

(B) Propan–2–amine

(C) Isopropylamine

(D) Dimethylamine

Ethylidene dichloride when boiled with aqueous solution of NaOH yields _______.

(A) formaldehyde

(B) acetaldehyde

(C) acetone

(D) ethyl methyl ketone

How is phenol prepared from cumene?

How is peptide linkage formed?

How is nitroethane converted into ethylamine.

How will you prepare ethanol, propan-2-ol and 2-methylpropan-2-ol from Grignard’s reagent?

Which among the following reactions is an example of a zero order reaction?

a) `H_(2(g)) + I_(2(g)) -> 2HI_(g)`

b) `2H_2O_(2(l)) -> 2H_2O_(l) + O_(2(g))`

c) `C_12H_22O_(11(aq)) + H_2O_(l) -> C_6H_12O_(6(aq)) + C_6H_12O_(6(aq))`

d) `2NH_(3g)`   `N(2g) + 3H_(2(g))`

The conductivity of 0.02M AgNO₃ at 25°C is 2.428 x 10^-3 Ω^-1 cm^-1. What is its molar
conductivity?

Natalite is a mixture of

(a) diethyl ether and methanol

(b) diethyl ether and ethanol

(c) dimethyl ether and methanol

(d) dimethyl ether and ethanol

What is effective atomic number of Fe (z = 26) in [Fe(CN)₆]^4-?

(a) 12

(b) 30

(c) 26

(d) 36

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

Write four points of distinction between Lanthanoids and Actinoids.

Write the formulae of the raw materials used for preparation of Dextran.

Write a note on Sandmeyer's reaction.

What is the action of benzene diazonium chloride on phenol in alkaline medium?

What is the action of benzene diazonium chloride on Aniline

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

What is the action of hot HI on it?