HSC Science (General) 11th Standard - Maharashtra State Board Question Bank Solutions

Define Least count. 

Identify the α - carbons in the following species and give the total number of α-hydrogen in each.

\[\ce{CH3 - CH2 - \overset{\oplus}{C}H - CH2 - CH3}\]

Identify the α-carbons in the following species and give the total number of α-hydrogen.

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

Identify primary, secondary, tertiary and quaternary carbon in the following compound:

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

Which of the following will exhibit geometical isomerism?

Identify primary, secondary, tertiary and quaternary carbon in the following compound.

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

Identify primary, secondary, tertiary and quaternary carbon in the following compound. 

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

Identify primary, secondary, tertiary and quaternary carbon in the following compound.

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

Which of the following will exhibit geometrical isomerism? 

Define: Least count

Choose the correct option:

By decomposition of 25 g of CaCO₃, the amount of CaO produced will be ________

Two elements A (At. mass 75) and B (At. mass 16) combine to give a compound having 75.8 % of A. The formula of the compound is ______.

Choose the correct option:

The hydrocarbon contains 79.87% carbon and 20.13% of hydrogen. What is its empirical formula?

Choose the correct option:

How many grams of oxygen will be required to react completely with 27 g of Al? (Atomic mass: Al = 27, O = 16)

Choose the correct option:

In CuSO₄.5H₂O the percentage of water is ______
(Cu = 63.5, S = 32, O = 16, H = 1)

Explain the term percentage composition.

Explain the term empirical formula.

Explain the term molecular formula.

Solve the following problem:

Work out the percentage composition of constituent elements in the following compound:

Lead phosphate [Pb₃(PO₄)₂]

(At. mass: Pb = 207; P = 31; O = 16; K = 39; Cr = 52; Na = 23; N = 14)

Solve the following problem:

Work out the percentage composition of constituent elements in the following compound:

Potassium dichromate (K₂Cr₂O₇)

(At. mass: Pb = 207; P = 31; O = 16; K = 39; Cr = 52; Na = 23; N = 14)