Hydrogenation...

Hydrogenation of Alkynes

Trending Questions

Q. 31. Which of the following carbocation is highly unstable? 1) CH2= CH -- CH2+ 2) CH3 -- CH+ -- CH3 3) CH3 -- C+ =O 4) CH2+ -- CH =O

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Q. when ethane is burnt in excess of oxygen the oxidation no of carbon changeb

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Q. How come benzen alcohol has 5 resonating structure?

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Q. Which of the following alkyne on catalytic hydrogenation does not give 3-ethylhexane?

All will give 3-ethylhexane on catalytic hydrogenation

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Q. In the following reaction:

C_{2} H_{2} H g S O_{4} / H_{2} S O_{4} - -------- \to 333 K (X) ⇌ C H_{3} C H O

What is (X) ?

$C H_{3} C H_{2} O H$
$C H_{2} = C H - O H$
$C H_{3} C H_{2} C H O$
$C H_{3} - O - C H_{3}$

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Which of the following expressions is the correct equilibrium-constant expression for the equilibrium between dinitrogen tetroxide and nitrogen dioxide?

N₂O₄ (g) ⇌ 2NO₂ (g)

[NO₂] [N₂O₄]

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Q. By which reagent alkyne converts to cis-alkene?
i.e.

C_{6} H_{11} - C \equiv C - C H_{3} R ⟶ cis-alkene

$C r_{2} O_{3} / A l_{2} O_{3}$
$H_{2}, P d / B a S O_{4}$
$N a / d r y e t h e r$
$N a / N H_{3} (l)$

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Q. Reaction of acetylene and propyne with

H g S O_{4}

in presence of

H_{2} S O_{4}

produces respectively.

Acetone and acetaldehyde
Acetaldehyde and acetone
Propanaldehyde and acetone
Acetone and propanaldehyde

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Q. Which one of the following alkenes will react fastey with H2 under catalytic hydrogenation conditions?\lbrack AIPMT (Prelims)-2005)12

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Q. Which of the following has minimum heat of hydrogenation?

trans-2-butene
ethene
Propene
cis-2-butene

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Q. Will alkenes show addition reaction according to Anti-Markownikov rule in presence of - (i) Hydrogen Peroxide (ii) Hydrogen Peroxide with sunlight( h neu) ?

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Q. when bromoethane is subjected to wurtz reaction , then how will the mixture so obtained consists of ethane and ethene

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Q. Consider the following reaction:

The correct set of reagents for these reactions

$R_{1}$ - $H_{2} / L i n d l a r^{'} s c a t a l y s t$
$R_{2}$ - $N a / l i q . N H_{3}$
$R_{3}$ - $(i) O_{3} (i i) H_{2} O$
$R_{4}$ - $H_{2} O, H_{2} S O_{4}, H g S O_{4}$
$R_{1}$ - $H_{2} / L i n d l a r^{'} s c a t a l y s t$
$R_{2}$ - $N a / l i q . N H_{3}$
$R_{3}$ - $H_{2} O, H_{2} S O_{4}, H g S O_{4}$
$R_{4}$ - $(i) O_{3} (i i) H_{2} O$
$R_{1}$ - $(i) O_{3} (i i) H_{2} O$
$R_{2}$ - $H_{2} O, H_{2} S O_{4}, H g S O_{4}$
$R_{3}$ - $N a / l i q . N H_{3}$
$R_{4}$ - $H_{2} / L i n d l a r^{'} s c a t a l y s t$
$R_{1}$ - $H_{2} O, H_{2} S O_{4}, H g S O_{4}$
$R_{2}$ - $H_{2} / L i n d l a r^{'} s c a t a l y s t$
$R_{3}$ - $(i) O_{3} (i i) H_{2} O$
$R_{4}$ - $N a / l i q . N H_{3}$

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