CHEM BRAIN

Propanone can be prepared from propyne by MDCAT2023

\( CH3COOH \)  is reacted with \( CH \equiv CH \) in presence of , Hg⁺⁺ the product is [DPMT 2004; BHU 1998]

Ozonolysis of acetylene gives [RPMT 1999]

Which of the following is used to distinguish ethylene and acetylene [MP PET 20CPMT 1977; NCERT 1973] 

KMnO4 will oxidize acetylene to [CPMT 1999]

Which of the following catalyst is used in the polymerisation of \( CH \equiv CH \  to \  C_6H_6 \) [CPMT 1999]

When treated with ammoniacal cuprous chloride, which one among the following forms copper derivative [CBSE PMT 1989; MP PMT 1993]

Propyne on polymerisation gives [CPMT 1999, 2002]

When propyne reacts with aqueous H₂ SO₄ in the presence of HgSO₄ , the major product is [IIT-JEE 1983; AFMC 1991; KCET 1993]

When acetylene reacts with HCl in the presence of HgCl₂ , the product is [MNR 1985; MP PET 1996; UPSEAT 2000]

A gas decolourises bromine in CCl ₄ and forms a precipitate with ammoniacal silver nitrate. The gas is [EAMCET 1998]

The product(s) obtained via oxymercuration ( HgSO₄ + H₂ SO₄ ) of 1-butyne would be [IIT-JEE 1999]

An unknown compound A has a molecular formula C₄ H₆ When A is treated with an excess of Br₂ a new substance B with formula C₄ H₆Br₄ is formed. A forms a white precipitate with ammoniacal silver nitrate solution. A may be [MP PET/PMT 1998]

The compound C₃H₄ has a triple bond, which is indicated by its reaction with [MP PMT 1999]

What is the end product of the following sequences of operations  [CPMT 1978; MP PMT 1996]

\( CaC_2  \xrightarrow{H2O} A \xrightarrow[Hg++]{dil.H2SO4} B \xrightarrow[H2]{Ni} C \) 

Which of the following will be the final product when C₂H₂ reacts with HCl          [DPMT 1984; AFMC 1982; Bihar MEE 1982]

When propyne is treated with dilute H₂SO₄ and HgSO₄ , the major product is [CEE 2002]

When propyne is treated with dilute H₂SO₄ and HgSO₄ , the major product is [CEE 2002]

Products of the following reaction

\( CH_3-C \equiv C-CH_2- CH_3 \xrightarrow[Hydrolysis]{O3}  \)    are     [CBSE PMT 2005]

Which is the most suitable reagent among the following to distinguish compound (iii) from rest of the compounds [CBSE PMT 1989]

(i) \( CH_3 - C \equiv C - CH_3 \)

(ii) \( CH_3 - CH_2 - CH_2 - CH_3 \) 

(iii) \(CH_3 - CH_2 - C \equiv CH \)

(iv) \( CH_3 -CH = CH_2 \)

The product formed when acetylene is passed through red hot tube is [BHU 1989; RPMT 2003] 

The product formed when acetylene is passed through red hot tube is [BHU 1989; RPMT 2003] 

1-butyne reacts with cold alkaline KMnO4 to produce [AIIMS 1997]

What is suitable catalyst for the reaction given below ? ETEA2016

\( HC\equiv CH  + H_2O \longrightarrow CH_2=CH-OH \longrightarrow CH_3-CHO \)

\( CH_3-CH_2-C \equiv CH  + H_2O  \longrightarrow \ ? \)         ETEA2016 med