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
Description : Oleic acid is a fatty acid containing (a) 12 carbons (b) 14 carbons (c) 16 carbons (d) 18 carbons
Last Answer : 18 carbons
Description : The maximum number of double bonds present in essential fatty acid is (A) 2 (B) 3 (C) 4 (D) 5
Last Answer : Answer : C
Description : The maximum number of double bonds present in essential fatty acid is (A) 1 (B) 2 (C) 3 (D) 4
Last Answer : Answer : D
Description : Unsaturated fatty acid found in the cod liver oil and containing 5 double bonds is (A) Clupanodonic acid (B) Cervonic acid (C) Elaidic acid (D) Timnodonic acid
Description : How can an organic compound exist without single bonds between the carbons?
Last Answer : This is a question much asked on the internet which leads me to believe it is a homework question. I do not believe in just giving students the answer as that would be ... /quantico/qmhs/homeworkHotline/documents/elementsoflivingthings.pdf read the pages and find your answer there. Good luck!
Description : Both stearic acid and linoleic acid have 18 carbons. Linoleic acid is unsaturated, while stearic acid is saturated. The melting point of stearic acid : (a) is higher than linoleic acid (b) is lower than linoleic acid (c) is same as linoleic acid (d) can not predict, insufficient information
Last Answer : is higher than linoleic acid
Description : Give the IUPAC (pron: I - U - PAY) name for the straight chain, saturated organic acid containing 10 carbons in an unbranched structure.
Last Answer : ANSWER: DECANOIC ACID
Description : What is the name given to a compound containing only carbons and hydrogens and having the maximum number of hydrogens in the molecule? (a) alkene (b) unsaturated hydrocarbon (c) saturated hydrocarbon (d) alkyne
Last Answer : saturated hydrocarbon
Description : The suffix number in the names of prostaglandins gives the number of (A) OH groups (B) Double bonds (C) Acid groups (D) Ketoacids
Last Answer : Answer : B
Description : Arachidonic acid contains the number of double bonds: (A) 2 (B) 3 (C) 4 (D) 5
Description : The number of double bonds in arachidonic acid is (A) 1 (B) 2 (C) 4 (D) 6
Description : All active prostaglandins have atleast one double bond between positions: (A) 7 and 8 (B) 9 and 10 (C) 11 and 12 (D) 13 and 14 FATS AND FATTY ACID METABOLISM 95
Last Answer : Answer : A
Description : Human desaturase enzyme system cannot introduce a double bond in a fatty acid beyond (A) Carbon 9 (B) Carbon 6 (C) Carbon 5 (D) Carbon 3
Description : Which of the following is a green house gas other than CO2? (A) Methane (B) Nitrous oxide (C) Chlorofluoro carbons (CFC) (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Enzymes contain 1. Peptide bonds 2. Amino acids 3. Halogens 4. Fatty acids The correct answers are: (a) 1 and 4 (b) 1,3 and 4 (c) 1 and 2 (d) 2, 3 and 4
Last Answer : Ans:(c)
Description : How Many Carbons in Acetyl Co ?
Last Answer : : Acetyl Co-A has 2 carbons.
Description : What is the fate of the carbons that entered the cycle that were found within the original glucose molecule?
Last Answer : What is the answer ?
Description : Which one amongst the following is not a Green House gas? (1) Nitrogen (2) Carbon dioxide (3) Carbon Monoxide (4) Chloro fluoro carbons
Last Answer : (1) Nitrogen Explanation: A greenhouse has (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. The primary greenhouse gases in the Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone.
Description : Write Applications of Carbons Allotropes with examples?
Last Answer : Ans. 1.Graphite is used as a lubricant, soft and slippery. 2. Diamond is used as aabrasive, cutting tool and in jewellery. 3. Fullerene is used in nanotechnology.
Description : Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion ... rate? (A) CO (B) SO2 (C) NOx (D) CFC (chloro fluoro carbons)
Last Answer : (A) CO
Description : Which hydrocarbon molecule with eight carbons would produce the lowest octane number (i.e., the most knocking) when used as a fuel in automobile? (a) 2-Methyl-3,3-dimethylpentane (b) n-Octane (c) 2-Isopropylpentane (d) 2-Methylheptane
Last Answer : n-Octane
Description : As the molecular weight of alkanes increases, how do the boiling point and melting point change? (a) boiling point increases ; melting point increases. (b) boiling point increases ; ... decreases (d) boiling point increases ; melting point increases sequentially for alkanes over four carbons.
Last Answer : boiling point increases ; melting point increases sequentially for alkanes over four carbons.
Description : A tertiary carbon is bonded directly to : (a) 2 hydrogens (b) 3 carbons (c) 2 carbons (d) 4 carbons
Last Answer : 3 carbons
Description : A meso compound : (a) is an achiral molecule which contains chiral carbons (b) contains a plane of symmetry or a centre of symmetry (c) is optically inactive (d) is characterized by all of the above
Last Answer : ) is characterized by all of the above
Description : An optically active compound (a) must contain atleast four carbons (b) when in solution rotate the plane of polarized light (c) must always contain an asymmetric carbon atom (d) in solution always give a negative reading in polarimeter
Last Answer : when in solution rotate the plane of polarized light
Description : Compound in which carbons use only sp3 hybrid orbitals for bond formation is (a) CH3CH2CH3 (b) CH3C≡CH (c) CH3CH=CH2 (d) CH2=CH—CH=CH2
Last Answer : CH3CH2CH3
Description : What is the I-U-P-A-C (pron: eye-you pack) name for a cyclic alkane containing four carbons?
Last Answer : ANSWER: CYCLOBUTANE
Description : How many carbons are found in a propane molecule?
Last Answer : ANSWER: 3
Description : In which country, the recent international agreement on phasing out Hydro Fluoro Carbons (HFCs) was signed? (A) Rwanda (B) Morocco (C) South Africa (D) Algeria
Last Answer : (A) Rwanda
Description : Among the following air pollutants which directly impacts human health as well as climate ? (A) Soot (B) Sulphur dioxide (C) Oxides of nitrogen (D) Chlorofluoro carbons
Last Answer : (A) Soot
Last Answer : Nitrogen
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
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 : Which of the following reactions of benzene proves the presence of three carbon-carbon double bonds in it :
Last Answer : Which of the following reactions of benzene proves the presence of three carbon-carbon double ... of concentrated nitric acid and sulphuric acid
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 `SO_(2)` two oxygen atoms are linked to the sulpher atom through double bonds. The two `pi` bonds are
Last Answer : In `SO_(2)` two oxygen atoms are linked to the sulpher atom through double bonds. The two `pi` bonds are A. ... (pi)-p_(pi)` and one `p_(pi)-p_(pi)`
Description : What are molecules that have alternating single and double bonds are called?
Last Answer : These are molecules in a conjugated system.
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 : The two strands of the DNA double helix are held together by (a) Hydrogen bonds (b)C=C double bonds (c) Hydrophobic bonds (d) Peptide bonds
Last Answer : Ans:(a)
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.
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.
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.
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.
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)
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
Description : Liquid oils can be converted to solid fats by (a) Hydrogenation (b) Saponification (c) Hydrolysis (d) Oxidation of double bonds
Last Answer : Hydrogenation
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.
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