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

Distinguish between ethylamine, diethylamine, and triethylamine by using Hinsberg’s reagent?

Choose the most correct option.

The prefix 'nano' comes from ____________.

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Which nanomaterial is used for tyres of the car to increase the life of tyres?

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Name the scientist who discovered a scanning tunneling microscope (STM) in 1980.

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Give the full form (long form) of the name for following instrument.

XRD

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Give the full form (long form) of the name for the following instrument.

TEM

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Give the full form (long form) of the name for the following instrument.

STM

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Give the full form (long form) of the name for the following instrument.

FTIR

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Give the full form (long form) of the name for the following instrument.

SEM

Answer the following in one sentence :

Classify the following buffers into different types :

NH₄OH + NH₄Cl

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Classify the following buffers into different types :

Sodium benzoate + benzoic acid

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Classify the following buffers into different types :

Cu(OH)₂ + CuCl₂

Explain with diagram, the vacancy defect.

How are nonstoichiometric point defects classified? Explain with diagram the metal deficiency defect.

Give the classification of stoichiometric point defects.

What is a substitutional impurity defect?

Explain solid solutions of metals and vacancy through aliovalent cations.

Which of the following statements is applicable for 0.1 M urea solution and 0.1 M sucrose solution?

What are hypertonic solutions?

When 50 g of a nonvolatile solute is dissolved in a certain quantity of solvent, the elevation of boiling point is 2.0 K. What will be the elevation of a boiling point when 30 g of solute is dissolved in the same amount of the same solvent?