Topic Question Set
Q 1
:
Compound A formed in the following reaction reacts with B gives the product C. Find out A and B. [2024]
(1)
Q 2
:
The incorrect statement regarding ethyne is [2024]
Both carbons are hybridised
The C − C bonds in ethyne is shorter than that in ethene
Ethyne is linear
The carbon-carbon bonds in ethyne is weaker than that in ethene
(4)
More are number of bonds between two atoms, shorter and stronger is the bond. Thus, carbon-carbon bond in ethyne is shorter and stronger than that of ethene.
Q 3
:
The major product of the following reaction is P.
Number of oxygen atoms present in product ‘P’ is _______. (nearest integer) [2024]
(2)
Q 4
:
Given below are two statements: [2025]
Statement I: One mole of propyne reacts with excess of sodium to liberate half a mole of gas.
Statement II: Four gram of propyne reacts with to liberate gas which occupies 224 mL.
In the light of the above statements, choose the most appropriate answer from the options given below:
Statement I is correct but Statement II is incorrect
Both Statement I and Statement II are incorrect
Statement I is incorrect but Statement II is correct
Both Statement I and Statement II are correct
(1)
Statement I: One mole propyne gives half mole hydrogen gas as per the following stoichiometry:
Statement II:
Moles of propyne
By stoichiometry, moles of = moles of propyne = 0.1 mol.
Volume occupied by 0.1 mol gas at STP = = 2240 mL
Q 5
:
Identify product [A], [B] and [C] in the following reaction sequence. [2025]
(4)
Catalytic hydrogenation of alkyne with Pd/C reduces an alkyne to alkane. To stop the reduction at alkene stage poison such as is needed. However in this question as per given choices, we need to stop the reduction upto alkene stage.
Q 6
:
The compound with molecular formula , which gives only one monobromo derivative and takes up four moles of hydrogen per mole for complete hydrogenation has ______ electrons. [2025]
(8)
