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

What are alkenes having two double bonds separated by one single bond known as?
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ANSWER: CONJUGATED DIENES 
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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.

Description : 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.

Last Answer : A π bond is lost but a stronger σ bond is gained.

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

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

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

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

How is double bond formed in alkenes?

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.

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

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

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

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

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 of alkynes are higher in energy than the bonds and are thus more reactive. (c) Unlike alkenes, alkynes fail to undergo electrophilic addition reactions. (d) Alkynes are generally more reactive than alkenes.

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.

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-carbon double bonds in aliphatic compounds. (c) The molecular geometry of benzene is best described as planar. (d) The stability of benzene ring is much greater than the stability of 1,3,5- cycloheptatriene

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

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

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

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

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

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

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

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

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

Which of the following statements are correct concerning benzene? (a) Benzene is a planar molecule. (b) The six carbon-carbon bonds have the same length. (c) Benzene has alternating single and double bonds. (d) (a) and (b)

Description : Which of the following statements are correct concerning benzene? (a) Benzene is a planar molecule. (b) The six carbon-carbon bonds have the same length. (c) Benzene has alternating single and double bonds. (d) (a) and (b)

Last Answer : (a) and (b)

Compounds of carbon having double or triple bonds between their carbon atoms are called (1) Saturated compounds (2) Unsaturated compounds (3) Reactive compounds (4) None of the above

Description : Compounds of carbon having double or triple bonds between their carbon atoms are called (1) Saturated compounds (2) Unsaturated compounds (3) Reactive compounds (4) None of the above

Last Answer : (2) Unsaturated compounds Explanation: Compounds of carbon, which are linked by only single bonds between the carbon atoms are called saturated compounds. Compounds of carbon having double or triple bonds between their carbon atoms are called unsaturated compounds.

An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the distance between adjacent carbon atoms is 1.39Å (intermediate between single and double bond lengths). The evidence suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane

Description : An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the ... suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane

Last Answer : Benzene

An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the distance between adjacent carbon atoms is 1.39Å (intermediate between single and double bond lengths). The evidence suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane

Description : An organic compound (A) has a molecular weight 78 and an empirical formula CH. (A) is resistant to attack by oxidizing agents but undergoes substitution and addition reactions. X-ray analysis shows that the ... suggests that compound (A) is (a) Benzene (b) Cyclohexane (c) Toluene (d) n-Hexane

Last Answer : Benzene

The carbon-carbon bond lengths in rank of increasing bond length is (a) triple, double, single(b) single, double, triple(c) single, triple, double(d) triple, single, double:

Description : The carbon-carbon bond lengths in rank of increasing bond length is : (a) triple, double, single (b) single, double, triple (c) single, triple, double (d) triple, single, double

Last Answer : triple, double, single

In brick masonry the bond produced by laying alternate headers and stretchers in each course is known as (A) English bond (B) Double Flemish bond (C) Zigzag bond (D) Single Flemish bond

Description : In brick masonry the bond produced by laying alternate headers and stretchers in each course is known as (A) English bond (B) Double Flemish bond (C) Zigzag bond (D) Single Flemish bond

Last Answer : Answer: Option B

What are molecules that have alternating single and double bonds are called?

Description : What are molecules that have alternating single and double bonds are called?

Last Answer : These are molecules in a conjugated system.

A single covalent bond (a) Is formed by the transfer of two electrons (b) Exists between hydrogen and chlorine in an aqueous solution, of hydrochloric acid (c) Is longer than a double bond (d) Does not require energy to disrupt it unlike an ionic bond

Description : A single covalent bond (a) Is formed by the transfer of two electrons (b) Exists between hydrogen and chlorine in an aqueous solution, of hydrochloric acid (c) Is longer than a double bond (d) Does not require energy to disrupt it unlike an ionic bond

Last Answer : Ans:(c)

The type of bond provided in brick masonry for carrying heavy loads is (A) Single Flemish bond (B) Double Flemish bond (C) English bond (D) Zigzag bond

Description : The type of bond provided in brick masonry for carrying heavy loads is (A) Single Flemish bond (B) Double Flemish bond (C) English bond (D) Zigzag bond

Last Answer : Answer: Option C

Single Flemish bond consists of (A) Double Flemish bond facing and English bond backing in each course (B) English bond facing and double Flemish bond backing in each course (C) Stretcher bond facing and double Flemish bond backing in each course (D) Double Flemish bond facing and header bond backing in each course

Description : Single Flemish bond consists of (A) Double Flemish bond facing and English bond backing in each course (B) English bond facing and double Flemish bond backing in each course (C) Stretcher bond ... bond backing in each course (D) Double Flemish bond facing and header bond backing in each course

Last Answer : Answer: Option A

In an oxygen molecule, two atoms are united by - (1) one bond (2) two bonds (3) three bonds (4) four bonds

Description : In an oxygen molecule, two atoms are united by - (1) one bond (2) two bonds (3) three bonds (4) four bonds

Last Answer : (2) two bonds Explanation: Two oxygen atoms can both achieve stable structures by sharing two pairs of electrons as in the diagram. Two electrons of each of the atom in the oxygen molecule ... is shown conventionally by two lines joining the atoms. Each line represents one pair of shared electrons.

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

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

Explain why the water molecule has a bent shape and a bond angle less than 109.5°The electron repulsion between the two lone pairs of electrons on the oxygen of water causes the O–H bonds to squeeze close together

Description : Explain why the water molecule has a bent shape and a bond angle less than 109.5° The electron repulsion between the two lone pairs of electrons on the oxygen of water causes the O–H bonds to squeeze close together

Last Answer : The electron repulsion between the two lone pairs of electrons on the oxygen of water causes the O–H bonds to squeeze close together

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

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

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

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

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

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

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

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

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

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

A triple bond consists of: w) three sigma bonds x) three pi bonds y) two sigma bonds and one pi bond z) one sigma bond and two pi bonds

Description : A triple bond consists of: w) three sigma bonds x) three pi bonds y) two sigma bonds and one pi bond z) one sigma bond and two pi bonds

Last Answer : ANSWER: Z -- ONE SIGMA BOND AND TWO PI BONDS

In an oxygen molecule, two atoms are united by (1) one bond (2) two bonds (3) three bonds (4) four bonds

Description : In an oxygen molecule, two atoms are united by (1) one bond (2) two bonds (3) three bonds (4) four bonds

Last Answer :  two bonds

What happens when a chemical bond is formed? (1) energy is always absorbed (2) energy in always released (3) more energy is released than is absorbed (4) energy is neither released nor absorbed Correct (4) Answer – (1) energy is always absorbed Explanation: If a bond is broken, energy is released; and if a bond is formed, energy must have been absorbed. As these occur, a change in the chemical energy of the system also occurs. Within each bond of a molecule is an experimentally determined amount of enemy that upon the breaking of that bond is released into the chemical system. The energy within these bonds are 'stored' and can be easily thought of as potential energy. Upon the breaking of these bonds the energy is released thereby creating usable energy.

Description : What happens when a chemical bond is formed? (1) energy is always absorbed (2) energy in always released (3) more energy is released than is absorbed (4) energy is neither released nor ... as potential energy. Upon the breaking of these bonds the energy is released thereby creating usable energy.

Last Answer : Silver nitrate solution is kept in brown bottles in laboratory because - (1) it reacts with ordinary white bottles (2) brown bottles stops the passage of light through it (3) brown bottles do not react with it (4) brown bottles react with it

Is the bond energy of all the four C-H bonds in CH4 molecule equal? If not then why ? How is C-H bond energy then reported?

Description : Is the bond energy of all the four C-H bonds in CH4 molecule equal? If not then why ? How is C-H bond energy then reported?

Last Answer : Ans. No because after breaking of C-H bonds one by one, the electronic environments change. The reported value is the average of of the bond dissociation energies of the four C-H bonds.

Which of the bonds in Ethyl alcohol (CH3CH2OH) will undergo heterolytic bond fission most readily? (a) O–H (b) C–H (c) C–O (d) C–C

Description : Which of the bonds in Ethyl alcohol (CH3CH2OH) will undergo heterolytic bond fission most readily? (a) O–H (b) C–H (c) C–O (d) C–C

Last Answer : O–H

Which of the following statements is not true about propyne, HC–C≡CH3? (a) It contains six sigma bonds. (b) It contains three pi bonds. (c) The H–C–H bond angle is about 109.5°. (d) The C–C–C bond angle is 180°.

Description : Which of the following statements is not true about propyne, HC–C≡CH3? (a) It contains six sigma bonds. (b) It contains three pi bonds. (c) The H–C–H bond angle is about 109.5°. (d) The C–C–C bond angle is 180°.

Last Answer : It contains three pi bonds

A triple bond consists of (a) 2 sigma bonds and 1 pi bond (b) 3 sigma bonds (c) 1 sigma bond and 2 pi bonds (d) 3 pi bonds

Description : A triple bond consists of (a) 2 sigma bonds and 1 pi bond (b) 3 sigma bonds (c) 1 sigma bond and 2 pi bonds (d) 3 pi bonds

Last Answer : 1 sigma bond and 2 pi bonds

Which of the following statements about ethene, C2H4, is incorrect? (a) The H–C–H bond angles are approximately 109.5°. (b) There is a total of five sigma bonds. (c) The carbon atoms are sp2 hybridized. (d) The H–C–H bond angles are approximately 120°.

Description : Which of the following statements about ethene, C2H4, is incorrect? (a) The H–C–H bond angles are approximately 109.5°. (b) There is a total of five sigma bonds. (c) The carbon atoms are sp2 hybridized. (d) The H–C–H bond angles are approximately 120°.

Last Answer : The H–C–H bond angles are approximately 109.5°.

A bond in which there is an unequal attraction for the shared electrons and a resultant unbalanced distribution of charge is which one of the following types of bonds? w) ionic x) pure covalent y) nonpolar covalent z) polar covalent

Description : A bond in which there is an unequal attraction for the shared electrons and a resultant unbalanced distribution of charge is which one of the following types of bonds? w) ionic x) pure covalent y) nonpolar covalent z) polar covalent 

Last Answer : ANSWER: Z -- POLAR COVALENT 

A triple bond consists of how many pi bonds and how many sigma bonds?

Description : A triple bond consists of how many pi bonds and how many sigma bonds?

Last Answer : ANSWER: ONE SIGMA BOND AND TWO PI BONDS

Which of the following molecular formulas will correspond to an alkene with two double bonds? (a) C4H10 (b) C5H12 (c) C6H10 (d) C8H16

Description : Which of the following molecular formulas will correspond to an alkene with two double bonds? (a) C4H10 (b) C5H12 (c) C6H10 (d) C8H16

Last Answer : C6H10

How will you demonstrate that double bonds of benzene are somewhat different from that of olefins?

Description : How will you demonstrate that double bonds of benzene are somewhat different from that of olefins?

Last Answer : Ans. The double bonds of olefins decolorize bromine water and discharge the pink colour of Bayer‘s reagent while those of benzene not.

Who do double bonds in rubber molecules influence there structure and reactivity.

Description : Who do double bonds in rubber molecules influence there structure and reactivity.

Last Answer : Ans: Greater the number of double bound the rubber will be less reactive because of greater inter molecular forces of attraction among the monomers.

How do double bonds in the rubber molecule influence their structure and reactivity ?

Description : How do double bonds in the rubber molecule influence their structure and reactivity ?

Last Answer : Due to presence of double bond the rubber molecule show cis-configuration because which the polymer chains can not come close to each other and get boiled but as they have their ... Waals intraction between the molecules consequently they get elastic property, solubility in organic solvents etc.

Benzene undergoes substitution reaction more easily than addition reaction because (a) it has a cyclic structure (b) it has three double bonds (c) it has six hydrogen atoms (d) there is delocalization of electrons

Description : Benzene undergoes substitution reaction more easily than addition reaction because (a) it has a cyclic structure (b) it has three double bonds (c) it has six hydrogen atoms (d) there is delocalization of electrons

Last Answer : there is delocalization of electrons

Benzene undergoes substitution reaction more easily than addition reaction because (a) it has a cyclic structure (b) it has three double bonds (c) it has six hydrogen atoms (d) there is delocalization of electrons

Description : Benzene undergoes substitution reaction more easily than addition reaction because (a) it has a cyclic structure (b) it has three double bonds (c) it has six hydrogen atoms (d) there is delocalization of electrons

Last Answer : there is delocalization of electrons

The double helical structure of DNA is held together by (a) sulfur-sulfur linkages (b) peptide bonding (c) hydrogen bonding (d) glycosidic bonds

Description : The double helical structure of DNA is held together by (a) sulfur-sulfur linkages (b) peptide bonding (c) hydrogen bonding (d) glycosidic bonds

Last Answer : hydrogen bonding

Which of the following statements is not true about fatty acids? (a) Fatty acids are carboxylic acids with long hydrocarbon side chains. (b) The double bonds in unsaturated fatty acids are always conjugated. (c) Most naturally occurring fatty acids contain even numbers of carbons and are unbranched. (d) Fatty acids can be saturated or unsaturated

Description : Which of the following statements is not true about fatty acids? (a) Fatty acids are carboxylic acids with long hydrocarbon side chains. (b) The double bonds in unsaturated fatty acids are always ... contain even numbers of carbons and are unbranched. (d) Fatty acids can be saturated or unsaturated

Last Answer : The double bonds in unsaturated fatty acids are always conjugated

Liquid oils can be converted to solid fats by (a) Hydrogenation (b) Saponification (c) Hydrolysis (d) Oxidation of double bonds

Description : Liquid oils can be converted to solid fats by (a) Hydrogenation (b) Saponification (c) Hydrolysis (d) Oxidation of double bonds

Last Answer : Hydrogenation

The unsaturated hydrocarbons having double bond between carbon atom are

Description : The unsaturated hydrocarbons having double bond between carbon atom are

Last Answer : alkene.