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

Calcium carbonate used in the extraction of iron acts as _______.

(A) oxidising agent

(B) reducing agent

(C) gangue

(D) flux

Construct a labelled diagram for the following cell:

`Zn|Zn^(2+)(1M)||H^+(1M)|H_(2(g,1atm))|Pt`

In the following 

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

(B) Propan–2–amine

(C) Isopropylamine

(D) Dimethylamine

Identify A and B in the following reaction:

`CH_3-Br+Mg"dry ether"/""A+CO_2"dry ether"/(H^+/(H_2O))B+Mg(Br)OH`

Identify A and B in the following reaction:

`CH_3-Br+Mg"dry ether"/""A+CO_2"dry ether"/(H^+/(H_2O))B+Mg(Br)OH`

How ligands are classified? Explain with suitable examples.

Explain the following term

Flux

The group 15 element having inner electronic configuration as of argon is-

(a) Phosphorous (z = 15)

(b) Antimony (z =51)

(c) Arsenic (z = 33)

(d) Nitrogen (z = 7)

Explain any two chemical methods of food preservation.

In Van Arkel method of refining metal, impure zirconium is converted to unstable volatile
compound by heating it with _______.

(A) oxygen

(B) chlorine

(C) bromine

(D) iodine

Define isotonic solutions.

Write electronic configuration and two uses of neon. (Z = 10)

Explain the mechanism of cleansing action of soaps.

Write balanced chemical equations for the action of hydrogen bromide on styrene in the presence of a peroxide

Write balanced chemical equations for the action of methyl bromide on silver propanoate

How soap is prepared?

Write the electronic configuration of the following element:

Krypton (Z = 36)

Write cathode and anode reaction in a fuel cell.

The oxidation state of nitrogen in dinitrogen trioxide is ____

(a) + 1

(b) + 2

(c) + 3

(d) + 4

Baeyer’s reagent is -'

(a) acidified potassium dichromate

(b) alkaline potassium dichromate

(c) alkaline potassium permanganate

(d) acidified potassium permanganate