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

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"`?

Answer the following in brief.

How instantaneous rate of reaction is determined?

Which of the following has the highest electron gain enthalpy?

Select appropriate answers for the following.

Hydrides of group 16 are weakly acidic. The correct order of acidity is ______.

Select appropriate answers for the following.

Which of the following element does not show an oxidation state of +4?

Select appropriate answers for the following.

HI acid when heated with conc. H₂SO₄ forms _______.