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

What is the role of the following compound -
CaF₂ in metallurgy of aluminum?

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 _________. 

Explain the geometry of [Cu(NH₃)₄]²⁺ on the basis of hybridisation [ At. No. Cu = 29 ]. 

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?

Choose the most correct option.

The colligative property of a solution is _______.

Choose the most correct option.

Ebullioscopic constant is the boiling point elevation when the concentration of a solution is _______.

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Cryoscopic constant depends on _______.

Identify the CORRECT statement.

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Henry’s law constant for a gas CH3Br is 0.159 mol dm^-3 atm^-1 at 25 °C. What is the solubility of CH₃Br in water at 25 °C and partial pressure of 0.164 atm?

Choose the most correct option.

Which of the following statement is NOT correct for 0.1 M urea solution and 0.05 M sucrose solution?