HSC Science (Electronics) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

test q 1234

What are nucleic acids?

Answer the following.

List the uses of Neon and argon gases.

Explain magnetic separation process of ores with the help of a neat, labelled diagram.

Cisplatin compound is used in the treatment of _______.

(A) malaria

(B) cancer

(C) AIDS

(D) yellow fever

A gas when passed through K₂Cr₂O₇ and dil. H₂SO₄ solution turns it green, the gas is

(A) CO₂

(B) NH₃

(C) SO₂

(D) Cl₂

A gas when passed through K₂Cr₂O₇ and dil. H₂SO₄ solution turns it green, the gas is

(A) CO₂

(B) NH₃

(C) SO₂

(D) Cl₂

The alcohol used in thermometers is _______.
(A) methanol

(B) ethanol

(C) propanol

(D) butanol

How is diethyl ether prepared by continuous etherification process?

How is ethanoic acid prepared from dry ice?

How is ethanoic acid prepared from dry ice?

Write the molecular and structural formula of BHA and BHT.

What are ‘antacids’?

Write any ‘two’ side effects of tranquilizers.

Define carbolic acid.

How carbolic acid is prepared from benzene sulphonic acid ?

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`