List of top Chemistry Questions on Hydrocarbons asked in JEE Advanced

Treatment of buta-$1,3$-diyne with $\mathrm{NaNH_2}$ (2 equivalents), followed by reaction with excess of trans-$\mathrm{CH_3-CH=CH-CH_2-Br}$ gives $X$ as the major product. The maximum number of carbon atoms that are collinear (in a straight line) in $X$ is ____.

Match the compounds in LIST-I with the observations in LIST-II, and choose the correct option.

LIST-I			LIST-II
I	Aniline	P	Sodium fusion extract of the compound on boiling with FeSO₄, followed by acidification with conc. H₂SO₄, gives Prussian blue color.
II	o-Cresol	Q	Sodium fusion extract of the compound on treatment with sodium nitroprusside gives blood red color.
III	Cysteine	R	Addition of the compound to a saturated solution of NaHCO₃ results in effervescence.
IV	Coprolactam	S	The compound reacts with bromine water to give a white precipitate
		T	Treating the compound with neutral FeCl₃ solution produces violet color.

The number of isomeric tetraenes (NOT containing $s p$-hybridized carbon atoms) that can be formed from the following reaction sequence is ______.

The number of $- CH _2$ - (methylene) groups in the product formed from the following reaction sequence is_____

The reaction of x g of Sn with HCl quantitatively produced a salt. The entire amount of the salt reacted with y g of nitrobenzene in the presence of the required amount of HCl to produce 1.29 g of an organic salt (quantitatively).
(Use Molar masses (in g mol^–1) of H, C, N, O, Cl and Sn as 1, 12, 14, 16, 35 and 119, respectively).

The reaction sequence(s) that would lead to o-xylene as the major product is(are).

Which of the following plots is (are) correct for the given reaction? ([P] $_{0}$ is the initial concentration of $P$ )