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

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Write chemical equation for the following:
Gatterman - Koch formylation

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

Write chemical equation for the following:
Gatterman - Koch formylation

[12.01] Aldehydes and Ketones
Chapter: [12.01] Aldehydes and Ketones
Concept: undefined >> undefined

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How is potassium dichromate prepared from chrome iron ore?

[8.01] D-block Elements
Chapter: [8.01] D-block Elements
Concept: undefined >> undefined

What is the role of the following compound- 
SiO2 in the extraction of copper from copper pyrites?

[6] General Principles and Processes of Isolation of Elements
Chapter: [6] General Principles and Processes of Isolation of Elements
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Write chemical equation for the following :
Rosenmund reduction

[12.01] Aldehydes and Ketones
Chapter: [12.01] Aldehydes and Ketones
Concept: undefined >> undefined

Write chemical equation for the following :
Rosenmund reduction

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

How will you convert calcium acetate to acetaldehyde?

[12.01] Aldehydes and Ketones
Chapter: [12.01] Aldehydes and Ketones
Concept: undefined >> undefined

How will you convert calcium acetate to acetaldehyde?

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

Complete the following statement by selecting the correct alternative from the choices given: 

In a face-centered cubic lattice, atom (A) occupies the comer positions and atom (B) occupies the face centre positions. If one atom of (B) is missing from one of the face-centered points, the formula of the compound is:

[1] Solid State
Chapter: [1] Solid State
Concept: undefined >> undefined

How much quantity of electricity in coulomb is required to deposit 1.346 × 10-3 kg of Ag in 3.5 minutes from AgNO3 solution?
( Given: Molar mass of Ag is 108 × 10-3 kg mol-1 )

[4] Electrochemistry
Chapter: [4] Electrochemistry
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Which of the following compounds of chlorine is used as refrigerant? 

[7.03] Group 17 Elements
Chapter: [7.03] Group 17 Elements
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What is the action of lithium aluminum hydride in the presence of ether on the following compounds? 
a. Nitroethane 
b. 2-Methyl-1-nitropropane

[9] Coordination Compounds
Chapter: [9] Coordination Compounds
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What is the action of following reagents on glucose?
1. Bromine water
2. Hydroxylamine

[12.02] Carboxylic Acids
Chapter: [12.02] Carboxylic Acids
Concept: undefined >> undefined

The functional group present in triacylglycerol is _______.

[12.02] Carboxylic Acids
Chapter: [12.02] Carboxylic Acids
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Give reasons for the following:

The transition metals generally form coloured compounds.

[8.01] D-block Elements
Chapter: [8.01] D-block Elements
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What is the effect of temperature on solubility of solids in water? Give examples.

[2] Solutions
Chapter: [2] Solutions
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Answer the following in one or two sentences.

Comment on the statement:

no work is involved in an expansion of gas in a vacuum.

[4] Chemical Thermodynamics
Chapter: [4] Chemical Thermodynamics
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Answer in brief.

Derive the expression for PV work.

[4] Chemical Thermodynamics
Chapter: [4] Chemical Thermodynamics
Concept: undefined >> undefined

Answer the following question.

One mole of an ideal gas is compressed from 500 cm3 against a constant pressure of 1.2 × 105 Pa. The work involved in the process is 36.0 J. Calculate the final volume.

[4] Chemical Thermodynamics
Chapter: [4] Chemical Thermodynamics
Concept: undefined >> undefined

Answer the following question.

Calculate the work done during the synthesis of NH3 in which volume changes from 8.0 dm3 to 4.0 dm3 at a constant external pressure of 43 bar. In what direction the work-energy flows?

[4] Chemical Thermodynamics
Chapter: [4] Chemical Thermodynamics
Concept: undefined >> undefined
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