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

How are ethers classified?

Write features of a reversible process.

The process of extracting a soluble material from an insoluble solid by dissolving out in a suitable solvent is known as _________. 

What are 'd' and 'f' block elements?

What is the action of the following on isopropyl methyl ether? 
a. Cold HI
b. Hot HI

Define:
a. Analgesics 
b. Antimicrobials 

An antihistamine drug is _______.

Which of the following is n-type semiconductor?

Choose the most correct answer.

In Frenkel defect, _______.

Which of the following is not correct?

Pb has fcc structure with edge length of unit cell 495 pm. Radius of Pb atom is ______.

Answer the following in one or two sentences.

What is the unit cell?

Cryoscopic constant depends on ______.

Select the most appropriate option.

The correct thermodynamic conditions for the spontaneous reaction at all temperatures are _______.

Select the most appropriate option.

A gas is allowed to expand in a well-insulated container against a constant external pressure of 2.5 bar from an initial volume of 2.5 L to a final volume of 4.5 L. The change in internal energy, ΔU of the gas will be _______.

Select the most appropriate option.

6.24 g of ethanol are vaporized by supplying 5.89 kJ of heat. Enthalpy of vaporization of ethanol will be _______.

Select the most appropriate option.

Which of the following are not state functions?

1. Q + W
2. Q
3. W
4. H - TS

Select the most appropriate option.

For vaporization of water at 1 bar, ΔH = 40.63 kJ mol^–1 and ΔS = 108.8 J K^–1 mol^–1 . At what temperature, ΔG = 0?

Choose the most correct option.

The rate law for the reaction aA + bB → P is rate = k[A] [B]. The rate of reaction doubles if _________.

Answer the following in one or two sentences.

For the reaction,

\[\ce{N2_{(g)} + 3H2_{(g)} -> 2NH3_{(g)}}\],

what is the relationship among `("d"["N"_2])/"dt"`, `("d"["H"_2])/"dt"` and `("d"["NH"_3])/"dt"`?