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

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Write preparation of acetic acid from:

acetyl chloride

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

Gold crystallises into face-centred cubic cells. The edge length of a unit cell is 4.08 × 10–8 cm. Calculate the density of gold. [Molar mass of gold = 197 g mol–1]

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

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Write preparation of acetic acid from:

dry ice

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

The boiling point of HCl is ______.

[7.03] Group 17 Elements
Chapter: [7.03] Group 17 Elements
Concept: undefined >> undefined

An element has a bee structure with unit cell edge length of 288 pm. How many unit cells and number of atoms are present in 200 g of the element?

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

The correct formula of a complex having IUPAC name Tetraamminedibromoplatinum (IV) bromide is ______.

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

The monomer of natural rubber is ______.

[15] Polymers
Chapter: [15] Polymers
Concept: undefined >> undefined

2000 mmol of an ideal gas expanded isothermally and reversibly from 20 L to 30 L at 300 K, calculate the work done in the process (R = 8.314 JK–1 mol–1).

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

Silver crystallizes in the fcc structure. If the edge length of the unit cell is 400 pm, calculate the density of silver (Atomic mass of Ag = 108).

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

Answer the following.

Name and draw structure of the repeating unit in natural rubber.

[15] Polymers
Chapter: [15] Polymers
Concept: undefined >> undefined

Answer the following.

Write the structure of isoprene and the polymer obtained from it.

[15] Polymers
Chapter: [15] Polymers
Concept: undefined >> undefined

Answer the following.

Name and draw structure of the repeating unit in natural rubber.

[15] Polymers
Chapter: [15] Polymers
Concept: undefined >> undefined

Answer the following.

Write the structure of isoprene and the polymer obtained from it.

[15] Polymers
Chapter: [15] Polymers
Concept: undefined >> undefined

Identify the chiral molecule from the following.

[10] Halogen Derivatives
Chapter: [10] Halogen Derivatives
Concept: undefined >> undefined

Identify chiral molecule/s from the following.

a.

\[\begin{array}{cc}
\ce{CH3 - CH - CH2 - CH3}\\
|\phantom{.........}\\
\ce{OH}\phantom{.......}
\end{array}\]

b.

\[\begin{array}{cc}
\ce{CH3 - CH2 - CH - CH2 - CH3}\\
|\phantom{..}\\
\ce{Br}\phantom{.}
\end{array}\]
c.

\[\ce{CH3 - CH2 - CH2 - CH2Br}\]

d.

\[\begin{array}{cc}
\ce{CH3 - CH - CH3 - CH3}\\
|\phantom{.........}\\
\ce{CH3}\phantom{.......}
\end{array}\]

[10] Halogen Derivatives
Chapter: [10] Halogen Derivatives
Concept: undefined >> undefined

Identify the chiral molecule from the following.

[10] Halogen Derivatives
Chapter: [10] Halogen Derivatives
Concept: undefined >> undefined

Identify chiral molecule/s from the following.

a.

\[\begin{array}{cc}
\ce{CH3 - CH - CH2 - CH3}\\
|\phantom{.........}\\
\ce{OH}\phantom{.......}
\end{array}\]

b.

\[\begin{array}{cc}
\ce{CH3 - CH2 - CH - CH2 - CH3}\\
|\phantom{.}\\
\ce{Br}\phantom{.}
\end{array}\]

c.

\[\ce{CH3 - CH - CH2 - CH2Br}\]

d.

\[\begin{array}{cc}
\ce{CH3 - CH - CH2 - CH3}\\
|\phantom{.........}\\
\ce{CH3}\phantom{......}
\end{array}\]

[10] Halogen Derivatives
Chapter: [10] Halogen Derivatives
Concept: undefined >> undefined

Identify the chiral molecule from the following.

[10] Halogen Derivatives
Chapter: [10] Halogen Derivatives
Concept: undefined >> undefined

Identify the chiral molecule from the following.

[10] Halogen Derivatives
Chapter: [10] Halogen Derivatives
Concept: undefined >> undefined

Identify chiral molecules from the following

a.

\[\begin{array}{cc}
\ce{CH3 - CH - CH2 - CH3}\\
|\phantom{.........}\\
\ce{OH}\phantom{.......}
\end{array}\]

b.

\[\begin{array}{cc}
\ce{CH3 - CH2 - CH - CH2 - CH3}\\
|\phantom{..}\\
\ce{Br}
\end{array}\]

c.

\[\begin{array}{cc}
\ce{CH3 - CH2 - CH2 - CH2Br}
\end{array}\]

d.

\[\begin{array}{cc}
\ce{CH3 - CH - CH3 - CH3}\\
|\phantom{.........}\\
\ce{CH3}\phantom{.......}
\end{array}\]

[10] Halogen Derivatives
Chapter: [10] Halogen Derivatives
Concept: undefined >> undefined
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