CHEM BRAIN

Addition reaction of 2-butene with HBr produces. [MDCAT2023] 

Which reactions are most common in alkenes [Pb. CET 1989]

Which reactions are most common in alkenes [Pb. CET 1989]

Markownikoff's rule provides guidance of addition of HBr on [MNR 1994]

Markownikoff's rule provides guidance of addition of HBr on [MNR 1994]

Ethene gives with acidic KMnO4 solution [MP PMT 1997]

Which of the following is the most stable alkene [AIIMS 1998; KCET (Med.) 2000; CPMT 2003]

Cyclopentene on treatment with alkaline KMnO4 gives [CPMT 1987] 

Cyclopentene on treatment with alkaline KMnO4 gives [CPMT 1987] 

In a reaction, if half of the double bond is broken and two new bonds are formed, this is a case of [AMU 1983; NCERT 1978; CPMT 1983]

Oils are converted into fats by [Kerala (Med.) 2002]

Oils are converted into fats by [Kerala (Med.) 2002]

1, 3-butadiene reacts with ethylene to form [BHU 2001]

A hydrocarbon X adds on one mole of hydrogen to give another hydrocarbon and de-colourized bromine water. X reacts with KMnO4 in presence of acid to give two moles of the same carboxylic acid. The structure of X is [JIPMER 2001]

Which of the following is not used to distinguish ethene from ethane [KCET (Med.) 2001; UPSEAT 2002; CBSE PMT 2002]

One mole of each of the following alkenes is catalytically hydrogenated. The quantity of heat evolved will be the lowest in the case of [Roorkee 2000]

Which of the following compound is produced when \( CH_2 =CH - (CH_2 )_2-COOH \) reacts with HBr in presence of peroxides [AIIMS 2000]

Isopropyl alcohol is obtained by reacting which of the following alkenes with conc. H₂ SO₄ and H₂O [MP PMT 1999]

Baeyer's reagent is used in the laboratory for [CBSE PMT 1991, 92; AIIMS 1998; AFMC 1999]

Aqueous sulphuric acid reacts with 2-methyl-1-butene to give predominantly [Roorkee 1992]

Dilute aqueous KMnO₄ , at room temperature reacts with \( R -CH = CH - R \) to give [Roorkee 1992]

Which one of the following characteristics apply to both ethene and ethyne [NCERT 1990]

In which of the following, addition of HBr does not take place against Markownikoff's rule or Anti-Markownikoff addition of HBr is not observed for [IIT-JEE 1985; CBSE PMT 1994; MADT Bihar 1995; MP PMT 1999; AMU 2002]

Ozonolysis of which one of the following will give two molecules of acetaldehyde  [Bihar MEE 1997; MP PET 2000]

When 3, 3-dimethyl-2-butanol is heated with H2 SO4 the major product obtained is [CBSE PMT 1995]

The disappearance of the characteristic purple colour of KMnO4 in its reaction with an alkene is the test for unsaturation. It is known as [CPMT 1989, 94; CBSE PMT 1990]

 \( \xrightarrow[KOH/heat]{X} \) +   X in the above reaction is [CPMT 1985, 93]

The propene reacts with HBr to form [AIIMS 1999; RPET 1999]

Alkenes usually show which type of reaction [AIIMS 1999; MADT Bihar 1980]

Ethene when treated with Br₂ in the presence of CCl ₄ which compound is formed [RPMT 1997; DCE 2001; KCET (Med.) 1999]

Addition of bromine to 1, 3-butadiene gives [CPMT 1987, 93]

Propene reacts with hypochlorous acid to form ETEA2017

Choose the least stable of the following butene ETEA2017

Alkenes undergo MDCAT2019

Which of the following reactions is used for the production of alcohols on industrial scale MDCAT2019

In the reaction sequence: MDCAT2019 

\( H_3C-CH_2-CH_2-Br \xrightarrow{\text{AlcKOH}} C \xrightarrow[\text{H2O}]{\text{H2SO4}} D \) 

Product D will be 

Which of the options show all possible products of combustion of butene SET2019

Bromination of alkene is shown in the following reaction. the reaction is used for MDCAT2018

\( CH_2=CH_2 + Br_2 \rightarrow CH_3-CH_3 \) 

Chlorination and Bromination mostly uses MDCAT2017

Reactivity order of alkene with hydrogen halide is MDCAT2015

Addition of unsymmetrical reagent to unsymmetrical alkene is governed by MDCAT2014

Hydrogenation of unsaturated oils is done by using MDCAT2011

Ethene on polymerization, give the product polyethene, this reaction may be called as MDCAT2012

What is the product formed when propene reacts with HBr. MDCAT2013

Compound X on reaction with O₃ followed by Zn/H₂O gives formaldehyde and 2-methyl propanal NEET2022