Science (English Medium) इयत्ता ११ - CBSE Question Bank Solutions

Distinguish between a sigma and a pi bond.

Give a brief description of the principle of the following technique taking an example.

Crystallisation 

Describe the method, which can be used to separate two compounds with different solubilities in a solvent S.

What do you understand by the term hydrogen economy?

What do you understand by the term hydrogenation?

What is the total number of sigma and pi bonds in the following molecules?

C₂H₄

The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction \[\ce{2A + 4B -> 3C + 4D}\], when 5 moles of A react with 6 moles of B, then which is the limiting reagent?

The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction \[\ce{2A + 4B -> 3C + 4D}\], when 5 moles of A react with 6 moles of B, then calculate the amount of C formed? 

Calcium carbonate reacts with aqueous \[\ce{HCl}\] to give \[\ce{CaCl2}\] and \[\ce{CO2}\] according to the reaction given below:

\[\ce{CaCO3(s) + 2HCl (aq) -> CaCl2 (aq) + CO2(g) + H2O (l)}\]

What mass of \[\ce{CaCl2}\] will be formed when 250 mL of 0.76 M \[\ce{HCl}\] reacts with 1000 g of \[\ce{CaCO3}\]? Name the limiting reagent. Calculate the number of moles of \[\ce{CaCl2}\] formed in the reaction.

Arrange s, p and d sub-shells of a shell in the increasing order of effective nuclear charge (Z_eff) experienced by the electron present in them.

Isostructural species are those which have the same shape and hybridisation. Among the given species identify the isostructural pairs.

The types of hybrid orbitals of nitrogen in \[\ce{NO^{+}2}\] , \[\ce{NO^{-}3}\] and \[\ce{NH^{+}4}\] respectively are expected to be ______.

Which of the following angle corresponds to sp² hybridisation?

Predict the shapes of the following molecules on the basis of hybridisation.

\[\ce{BCl3, CH4 , CO2, NH3}\]

Match the species in Column I with the type of hybrid orbitals in Column II.

Match the shape of molecules in Column I with the type of hybridisation in Column II.

Discuss the concept of hybridisation. What are its different types in a carbon atom.

What is the type of hybridisation of carbon atoms marked with star.

\[\begin{array}{cc}
\phantom{.....}\ce{O}\\
\phantom{.....}||\\
\ce{\overset{∗}{C}H2 = CH - \overset{∗}{C} - O - H}
\end{array}\]

What is the type of hybridisation of carbon atoms marked with star.

\[\ce{CH3 - \overset{∗}{C}H2 - OH}\]

What is the type of hybridisation of carbon atoms marked with star.

\[\begin{array}{cc}
\phantom{..........}\ce{O}\\
\phantom{..........}||\\
\ce{CH3 - CH2 - \overset{∗}{C} - H}
\end{array}\]