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

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Answer the following.

How are XeO3 and XeOF4 prepared?

[7] Elements of Groups 16, 17 and 18
Chapter: [7] Elements of Groups 16, 17 and 18
Concept: undefined >> undefined

Answer the following.

Describe the structure of the Ozone. Give two uses of ozone.

[7] Elements of Groups 16, 17 and 18
Chapter: [7] Elements of Groups 16, 17 and 18
Concept: undefined >> undefined

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Balance the following equation

\[\ce{KMnO4 + H2C2O4 + H2SO4 -> MnSO4 + K2SO4 + H2O + O2}\]

[8] Transition and Inner Transition Elements
Chapter: [8] Transition and Inner Transition Elements
Concept: undefined >> undefined

Answer the following question.

How stability of the coordination compounds can be explained in terms of equilibrium constants?

[9] Coordination Compounds
Chapter: [9] Coordination Compounds
Concept: undefined >> undefined

Answer the following question.

Name the factors governing the equilibrium constants of the coordination compounds.

[9] Coordination Compounds
Chapter: [9] Coordination Compounds
Concept: undefined >> undefined

Benzaldehyde does NOT show positive test with ______.

[12] Aldehydes, Ketones and Carboxylic Acids
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
Concept: undefined >> undefined

Answer in brief.

Observe the following equation of reaction of Tollens' reagent with aldehyde. How do we know that a redox reaction has taken place? Explain.

\[\ce{R-CHO + 2Ag(NH_{3})^{+}_{2} + OH^{-}->[\triangle] R-CO{O}^{-} + 2Ag↓ + 4NH3 + 2H2O}\]

[12] Aldehydes, Ketones and Carboxylic Acids
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
Concept: undefined >> undefined

Answer in brief.

What is the action of hydrazine on cyclopentanone in presence of KOH in ethylene glycol?

[12] Aldehydes, Ketones and Carboxylic Acids
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
Concept: undefined >> undefined

Write a note on Stephen reaction.

[12] Aldehydes, Ketones and Carboxylic Acids
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
Concept: undefined >> undefined

Answer in one sentence.

Write the reaction of p-toluenesulphonyl chloride with diethylamine.

[13] Amines
Chapter: [13] Amines
Concept: undefined >> undefined

Write reaction showing aldol condensation of cyclohexanone.

[12] Aldehydes, Ketones and Carboxylic Acids
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
Concept: undefined >> undefined

Answer in brief.

Write reaction showing conversion of Acetaldehyde into acetaldehyde dimethyl acetal.

[12] Aldehydes, Ketones and Carboxylic Acids
Chapter: [12] Aldehydes, Ketones and Carboxylic Acids
Concept: undefined >> undefined

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

[13] Amines
Chapter: [13] Amines
Concept: undefined >> undefined

Choose the most correct option.

The prefix 'nano' comes from ____________.

[16] Green Chemistry and Nanochemistry
Chapter: [16] Green Chemistry and Nanochemistry
Concept: undefined >> undefined

Answer the following

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

[16] Green Chemistry and Nanochemistry
Chapter: [16] Green Chemistry and Nanochemistry
Concept: undefined >> undefined

Answer the following

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

[16] Green Chemistry and Nanochemistry
Chapter: [16] Green Chemistry and Nanochemistry
Concept: undefined >> undefined

Answer the following

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

XRD

[16] Green Chemistry and Nanochemistry
Chapter: [16] Green Chemistry and Nanochemistry
Concept: undefined >> undefined

Answer the following

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

TEM

[16] Green Chemistry and Nanochemistry
Chapter: [16] Green Chemistry and Nanochemistry
Concept: undefined >> undefined

Answer the following

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

STM

[16] Green Chemistry and Nanochemistry
Chapter: [16] Green Chemistry and Nanochemistry
Concept: undefined >> undefined

Answer the following

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

FTIR

[16] Green Chemistry and Nanochemistry
Chapter: [16] Green Chemistry and Nanochemistry
Concept: undefined >> undefined
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