Which brief statement most accurately describes why alkenes react the way
they do?
(a) C=C double bonds are weak.
(b) A π bond is lost but a stronger σ bond is gained.
(c) C=C double bonds are unstable.
(d) C=C π bonds are attacked by nucleophiles.

1 Answer

Answer :

A π bond is lost but a stronger σ bond is gained.

Related questions

Description : Carbon-carbon double bonds consist of : (a) one σ bond, one π bond (b) two σ bonds, one π bond (c) one σ bond, two π bonds (d) two σ bonds, two π bonds

Last Answer : one σ bond, one π bond

Description : Which of the following statements correctly describes the general reactivity of alkynes? (a) An alkyne is an electron-rich molecule and therefore reacts as a nucleophile. (b) The σ bonds ... fail to undergo electrophilic addition reactions. (d) Alkynes are generally more reactive than alkenes.

Last Answer : Alkynes are generally more reactive than alkenes.

Description : Acetone contains (a) nine σ bonds plus one π bond (b) ten σ bonds (c) eight σ bonds plus two π bonds (d) nine π bonds plus one σ bond

Last Answer : nine σ bonds plus one π bond

Description : 1-Buten-3-yne has (a) six σ and four π bonds (b) seven σ and three π bonds (c) eight σ and two π bonds (d) nine σ and one π bond

Last Answer : seven σ and three π bonds

Description : In propyne there are (a) six σ bonds and two π bonds (b) seven σ bonds and one π bond (c) six σ bonds and one π bond (d) eight σ bonds

Last Answer : six σ bonds and two π bonds

Description : In propene there are (a) eight σ bonds and one π bond (b) seven σ bonds and two π bonds (c) six σ bonds and three π bonds (d) nine σ bonds

Last Answer : eight σ bonds and one π bond

Description : Acetylene has a total of : (a) one σ bond, two π bonds (b) two σ bonds, four π bonds (c) three σ bonds, two π bonds (d) one σ bond, four π bonds

Last Answer : three σ bonds, two π bonds

Description : What are alkenes having two double bonds separated by one single bond known as?

Last Answer : ANSWER: CONJUGATED DIENES 

Description : Catenation is a property of the carbon atom which describes its ability to (a) bond with other carbon atoms (b) form double and triple bonds (c) exist in plant and animal form (d) form bonds in its ground state

Last Answer : bond with other carbon atoms

Description : Alkenes show geometrical isomerism due to : (a) Asymmetry (b) Rotation around a single bond (c) Resonance (d) Restricted rotation around a double bond

Last Answer : Restricted rotation around a double bond

Description : How is double bond formed in alkenes?

Last Answer : In alkenes, two hydrogen atoms are less when compared to the saturated hydrocarbons. The two of the carbon atoms in the molecule is joined together by two covalent bonds. Thus a double bond is formed.

Description : Which statement about the structure of benzene is not true? (a) The two Kekule structures of benzene are in equilibrium. (b) The carbon-carbon bond lengths in benzene are greater than the carbon- ... (d) The stability of benzene ring is much greater than the stability of 1,3,5- cycloheptatriene

Last Answer : The two Kekule structures of benzene are in equilibrium

Description : Explain the following : (i) Low spin octahedral complexes of nickel are not known. (ii) The π-complexes are known for transition elements only. (iii) CO is a stronger ligand than NTL, for many metals. -Chemistry

Last Answer : (i) The electronic configuration of Ni is [Ar] 3d8 4s2 which shows that it can only form two types of complexes i.e. square planar (dsp2) in presence of strong ligand and tetrahedral (sp3) in ... more splitting of d-orbitals and moreover it is also able to form π bond due to back bonding.

Description : A family of organic compounds containing only carb and hydrogen and having only single bonds are the: w) alkenes and alkanes x) alkanes and cycloalkanes y) alkynes (pron: AL-kines) and alkenes z) cycloalkanes and alkenes

Last Answer : ANSWER: B -- ALKANES AND CYCLOALKANES

Description : How many σ (sigma) bonds are there in CH2=CH—CH=CH2? (a) 3 (b) 6 (c) 9 (d) 12

Last Answer : 9

Description : What is the weak bond holding the nucleic acids together in DNA? a. ionic bonds b. covalent bonds bonds c. polar bond d. hydrogen bond

Last Answer : d. hydrogen bond

Description : Ethers react with cold concentrated H2SO4 to form (a) Oxonium salts (b) Alkenes (c) Alkoxides (d) Zwitterions

Last Answer : Oxonium salts

Description : The bats can fly in the dark because – (1) They can see the objects in darkness (2) They have weak legs and are likely to be attacked by predators (3) They generate flashes of light (4) They generate ultrasonic sound waves

Last Answer : (3) They generate flashes of light

Description : As compared to English bond, double Flemish bond is (A) Stronger (B) More compact (C) Costly (D) None of these

Last Answer : Answer: Option B

Description : In 2-butene, which of the following bonds prevents the atoms at each end of the bond from rotating with respect to each other. Is it an: w) ionic bond x) sigma bond y) strong bond z) double bond

Last Answer : ANSWER: Z -- DOUBLE BOND

Description : Which of the following describes a triple bond? (a) two sigma bonds and two pi bonds (b) one sigma bond and one pi bond (c) two sigma bonds and one pi bond (d) one sigma bond and two pi bonds

Last Answer : one sigma bond and two pi bonds

Description : Hydrocarbons that contain a triple bond between carbon atoms are known as: w) alkenes x) alkanes y) alkynes z) polymers

Last Answer : ANSWER: Y -- ALKYNES

Description : Which statement about the carbonyl group of ketones and aldehydes is true? I. It can attract nucleophiles. II. It can attract electrophiles. III. It tends to undergo addition reactions. IV. It tends to undergo substitution reactions. (a) I and III (b) II and IV (c) I, II, and III (d) I, III, and IV

Last Answer : I, II, and III

Description : What two atomic orbitals or hybrid atomic orbitals overlap to form the carbon-carbon σ bond in ethyne? (a) sp3–sp3 (b) sp2–sp2 (c) s–s (d) sp–sp

Last Answer : sp–sp

Description : Immiscible liquids: w) are not mutually soluble x) dissolve in each other y) dissolve in more than one liquid z) are unstable and chemically react e) do not exist

Last Answer : ANSWER: W -- ARE NOT MUTUALLY SOLUBLE

Description : The bats can fly in the dark because – (1) They can see the objects in darkness (2) They have weak legs and are likely to be attacked by predators (3) They generate flashes of light (4) They generate ultrasonic sound waves

Last Answer : (3) They generate flashes of light

Description : The bats can fly in the dark because (1) they can see the objects in darkness (2) they have weak legs and are likely to be attacked by predators (3) they generate flashes of light (4) they generate ultrasonic sound waves

Last Answer : they generate ultrasonic sound waves

Description : Which of the following statements is false about cyclohexane? (a) It is a saturated cyclic hydrocarbon (b) All C–C–C bond angles are 109°28' (c) It is very unstable, strained compound. (d) It can exist in two conformations which are designated as the boat-form and the chair-form

Last Answer : It is very unstable, strained compound

Description : Assertion: The O - O bond lengths in ozone molecule are intermediate between single and double bonds. Reason: `O_(3)` molecule is a resonance hybrid.

Last Answer : Assertion: The O - O bond lengths in ozone molecule are intermediate between single and double bonds. ... I is not correct and Statement-II is correct

Description : In double bond, how many sigma and Pi bonds are present in it ?

Last Answer : Double bond = 1 Sigma bond and one Pi bond Among sigma and Pi bonds which is the stronger one Sigma bond is Stronger than pi bond

Description : Which statement describes the political state of Africa after most countries gained their independence?

Last Answer : Answer this question…The continent was divided into many small states based onregional differences.

Description : Which of the following statements is correct regarding nucleophiles? (a) They have an overall positive charge (b) They have a lone-pair of electrons (c) They have an unpaired electron (d) They have empty orbitals

Last Answer : (b) They have a lone-pair of electrons

Description : Which statement most accurately describes one way that either Judeo-Christian principles or Greco-Roman principles have influenced modern democracy?

Last Answer : Judeo-Christian principles have led to the idea that laws shouldbe based on a moral code.

Description : Why are ionic bonds stronger ?

Last Answer : Ionic bonds are strengthened by static electrical attraction.

Description : Characteristic reactions of aromatic hydrocarbons are initiated by (a) Electrophiles (b) Nucleophiles (c) Free radicals (d) Uncharged molecules

Last Answer : Electrophiles

Description : Pick up the correct statement from the following: (A) Illite bond is weaker than Kaolinite bond (B) Illite bond is stronger than montmorillonite bond (C) Illite does not swell when wet (D) All the above

Last Answer : Answer: Option D

Description : Steam distillation is not recommended to be used, if the (A) Azeotropic mixture is to be separated and the final product is miscible with water (B) Liquids decompose, if ... unstable or has the tendency to react with other components associated with it, at the boiling temperature

Last Answer : (A) Azeotropic mixture is to be separated and the final product is miscible with water

Description : White phosphorous is stored under water, because (A) It does not react with water (B) It is poisonous (C) Its kindling temperature in dry air is very low (D) It is unstable

Last Answer : (C) Its kindling temperature in dry air is very low

Description : Firewall: (a) Amplifies weak outgoing signals to stronger ones -Technology

Last Answer : (d) A firewall can either be software based or hardware based and is used to prevent intruders from accessing your system.

Description : which statement accurately describes the Virginia plan?

Last Answer : There would be 2 houses in Congress and representatives one be assigned a based on state population

Description : What statement accurately describes a difference between the Declaration of Independence and the U.S. Constitution?

Last Answer : The US Constitution established rules for the US government, well the Declaration of Independence did not

Description : What statement accurately describes how a historical society influenced the development of democracy?

Last Answer : Citizens in ancient Greek city states developed ideas about representation that established direct democracy

Description : What statement accurately describes the influence of petition of right?

Last Answer : What is the answer ?

Description : What statement most accurately describes special district?

Last Answer : They are especially useful in rural areas.

Description : What statement accurately describes how a historical society influenced the development of democracy?

Last Answer : Citizens in ancient Greek city states developed ideas about representation that established direct democracy

Description : Which statement accurately describes the concept of a social contract?

Last Answer : An agreement between people to follow laws and be governed by aleader or leaders

Description : What statement accurately describes the U.S. government's handling of Japanese Americans during World War 2?

Last Answer : You did not include the choices.

Description : What statement accurately describes the supremacy clause of the constitution?

Last Answer : It says that Federal Laws are superior to state laws -Apex

Description : Which statement accurately describes a long-term cost of the Atlantic slave trade?

Last Answer : Entire African societies were destroyed in conflicts with slave traders. APEX

Description : which statement accurately describes u.s foreign policy intentions during the signing of both the oslo accords and the camps david accords?

Last Answer : The United States tried to broker peace between Israeli and Arab leaders.