CBSE Class 11 (Science) Alkenes — practice questions
55 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 11 (Science) Alkenes in the app →According to VSEPR theory, the shape of a molecule is determined byThe hybridisation of carbon in methane (CH₄) isWhich molecule is non-polar despite having polar bonds?The bond order of the oxygen molecule O₂ (by molecular orbital theory) isA coordinate (dative) bond differs from a normal covalent bond in thatWhich species has sp hybridisation on the central atom?As bond order increases, bond lengthAn ionic bond forms byThe shape of NH₃ is pyramidal rather than planar becauseWhich has the highest dipole moment?Among the following, which is paramagnetic?Formal charge on an atom = As per your syllabus, the general formula of an alkane (saturated open-chain hydrocarbon) is which?As per your syllabus, + Fig 9.1, the H-C-H bond angle in methane and the carbon hybridisation are which?As per your syllabus, (ii), the Wurtz reaction uses which reagent + solvent for coupling alkyl halides?As per your syllabus, (i), heating CH₃COONa with NaOH + CaO (soda-lime) produces which gas?As per your syllabus, (ii), in Kolbe electrolytic synthesis of alkanes, the alkane gas is liberated at which eAs per your syllabus, the rate of HALOGENATION of alkanes (F₂, Cl₂, Br₂, I₂) decreases in which order?As per your syllabus, the rate of substitution of HYDROGENS in alkane halogenation goes in which order (by carAs per your syllabus, Mechanism, the FIRST step of methane chlorination under sunlight is best described as whAs per your syllabus, the STAGGERED form of ethane is more stable than ECLIPSED for which reason?As per your syllabus, hydrogenation of an alkene to an alkane uses dihydrogen with which kind of catalyst?As per your syllabus, in ethene the C-C bond consists of which σ/π combination, and the carbons are which hybrAs per your syllabus, geometrical (cis-trans) isomerism in alkenes arises because of which feature of the doubAs per your syllabus, the dipole moment of cis-but-2-ene (0.33 D) and trans-but-2-ene (≈ 0 D) shows which formAs per your syllabus, partial reduction of an alkyne to a CIS alkene uses which catalyst?As per your syllabus, reduction of an internal alkyne with Na in LIQUID NH₃ gives which kind of alkene?As per your syllabus, HBr addition to propene gives mainly which product?As per your syllabus, the peroxide (Kharasch) effect on HBr addition to propene gives mainly which product?As per your syllabus, the peroxide effect is observed only with which hydrogen halide?As per your syllabus, the rate-determining intermediate in HBr + propene addition is which species?As per your syllabus, mild oxidation of an alkene with cold dilute KMnO₄ (Baeyer's reagent) gives which producAs per your syllabus, reductive ozonolysis of an alkene with O₃ followed by Zn/H₂O gives which class of producAs per your syllabus, addition of conc. H₂SO₄ to an alkene followed by water gives mainly which class of compoAs per your syllabus, the carbon-carbon triple bond in ethyne (HC≡CH) consists of which σ/π combination?As per your syllabus, the C-H bond in ethyne is unusually ACIDIC because of which factor?As per your syllabus, calcium carbide (CaC₂) reacts with water to give which gas?As per your syllabus, terminal alkynes react with sodium metal to liberate which gas + sodium acetylide?As per your syllabus, addition of water to ethyne in dilute H₂SO₄ with HgSO₄ catalyst gives which final producAs per your syllabus, addition of water to propyne under HgSO₄/H₂SO₄ gives mainly which product (Markovnikov)?As per your syllabus, three molecules of ethyne polymerise over a hot red-hot tube to give which compound?As per your syllabus, HBr addition to propyne gives which Markovnikov product?As per your syllabus, reduction of an alkyne to a TRANS alkene uses which reagent system?As per your syllabus, the general molecular formula of an open-chain alkyne is which?As per your syllabus, the THREE criteria for aromaticity (Hückel) are which set?As per your syllabus, for benzene the value of n in Hückel's (4n+2) π electron formula is which?As per your syllabus, all six C-C bond lengths in benzene are equal to approximately which value?As per your syllabus, the carbon atoms of benzene are which hybridisation?As per your syllabus, nitration, the actual ELECTROPHILE that attacks benzene in HNO₃ + H₂SO₄ mixture is whichAs per your syllabus, halogenation, the role of anhydrous AlCl₃ (or FeCl₃) in benzene chlorination is which?As per your syllabus, Friedel-Crafts ALKYLATION of benzene uses which reagent system?As per your syllabus, Friedel-Crafts ACYLATION of benzene uses an acyl halide + AlCl₃ to generate which electrAs per your syllabus, which of the following groups is a META-directing substituent on benzene?As per your syllabus, halogens (-Cl, -Br) on benzene are which kind of directors despite their deactivating -IThe general formula for alkanes is: