Description : Which of the following correctly ranks the cycloalkanes in order of increasing ring strain per methylene? (a) cyclopropane < cyclobutane < cyclohexane < cycloheptane (b) cyclohexane < ... < cyclobutane < cyclopentane < cyclopropane (d) cyclopentane < cyclopropane < cyclobutane < cyclohexane
Last Answer : cyclohexane < cyclopentane < cyclobutane < cyclopropane
Description : Which of the following cycloalkanes is most reactive? (a) Cyclopropane (b) Cyclohexane (c) Cyclobutane (d) Cycloheptane
Last Answer : Cyclopropane
Description : Cyclobutane reacts with hydrogen in the presence of nickel catalyst at 200°C to give (a) Butane (b) 1-Butene (c) 2-Butene (d) None of these
Last Answer : Butane
Description : Cyclopropane reacts with concentrated HBr to give. (a) 1-Bromopropane (b) Bromocyclopropane (c) 2-Bromopropane (d) 1,2-Dibromopropane
Last Answer : 1-Bromopropane
Description : Which of the following compounds will give cyclopropane on treatment with sodium in dry ether? (a) 1,3-Dibromopropane (b) 1,1-Dibromopropane (c) 1,2-Dibromopropane (d) 2,2-Dibromopropane
Last Answer : 1,3-Dibromopropane
Description : Which of the following compounds may exist as cis-trans isomers? (a) 1-Butene (b) 2-Butene (c) Cyclopropane (d) Acetone
Last Answer : 2-Butene
Description : Cycloalkanes have the same molecular formula as : (a) Alkanes (b) Alkenes (c) Alkynes (d) Cycloalkenes
Last Answer : 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
Description : A family of organic compounds whose molecules will add water under an acid catalysis and change into alcohols are the: w) alkenes x) alkanes y) aromatic hydrocarbons z) cycloalkanes
Last Answer : ANSWER: W -- ALKENES
Description : Which of the following contain sp2 hybridized carbon atoms? w) alkanes x) alkenes y) alkynes z) cycloalkanes
Last Answer : ANSWER: X -- ALKENES
Description : Classify the following into saturated and unsaturated hydrocarbons – Benzene, cyclopropane, alkene and alkane, methane, ethene, Propyne, butene
Last Answer : Saturated: Alkane, cyclopropane, methane Unsaturated: Benzene, alkene, ethene, Propyne, butene
Description : Second gas effect’ is exerted by the following gas when coadministered with halothane: A. Nitrous oxide B. Cyclopropane C. Nitrogen D. Helium
Last Answer : A. Nitrous oxide
Description : Even though alkenes and Cycloalkanes have the same general formula, they are different. How?
Last Answer : Alkenes are unsaturated where as Cycloalkanes are saturated.
Description : Mention the differences between alkenes and Cycloalkanes.
Last Answer : Alkenes 1. They are unsaturated 2. They have double bond between carbon atoms 3. Their name end with ‘ene’. 4. They are acyclic. Cycloalkanes 1. They are saturated 2. They have single bond between carbon atoms. 3. Their names end with ‘ane’ 4. They are cyclic
Description : Give reason: Alkenes and Cycloalkanes have same general formula.
Last Answer : Alkenes and Cycloalkanes have same general formula because they have double bond between carbon atoms.
Description : Write the structural formula of the first member of Cycloalkanes.
Last Answer : The first member of the Cycloalkanes is cyclopropane (C3H6). Its structure is
Description : What are Cycloalkanes?
Last Answer : Cycloalkanes are closed chain saturated hydrocarbons having one ring and the general formula C n H 2n .
Description : What is Hooke's Law? (1) Stress is inversely proportional to strain. (2) Stress is directly proportional to strain. (3) Stress and strain are dependent on each other. (4) Stress and strain are independent of each other.
Last Answer : (2) Stress is directly proportional to strain. Explanation: Hooke's law is a principle of physics that states that the force (F) needed to extend or compress a spring by some distance X scales linearly with respect to that distance.
Description : Eposure to mixtures of chemicals are greater than expected on the basis of effects of expo-sure to each chemical individually. This is known as – (1) Additives (2) Antagonism (3) Synergism (4) Independent
Last Answer : (3) Synergism Explanation: When the toxic effect of the mixture is greater than that expected for the sum of individual constituent doses, which is that effects of combined doses are more- ... less than that expected under the dose additivity assumption, the interactions are said to be antagonistic.
Description : The pH of lemon juice is expected to be (1) equal to 7 (2) nothing can be predicted (3) less than 7 (4) more than 7
Last Answer : (3) less than 7 Explanation: The pH level of lemon juice is, 2.00 to 2.60. It varies depending on the lemon. pH expresses different levels of acidity or alkalinity within a solution.
Description : Which of the two: O2NCH2CH2O– or CH3CH2O– is expected to be more stable and why?
Last Answer : Ans. O2NCH2CH2O– is more stable than CH3CH2O– because NO2 group has –I effect and hence it tends to disperse the negative charge on the oxygen atom. In contrast, CH3CH2 has +I effect. It, therefore, tends to intensify the negative charge and hence destabilizes it.
Description : In which C–C bond of CH3CH2CH2Br, the inductive effect is expected to be the least?
Last Answer : Ans. The magnitude of inductive effect decreases with distance and hence the effect is least in C2-C3 bond.
Description : Suggest the expected shape of the following molecules with reasons a.SO2 b.NH3
Last Answer : Ans.(a) In SO2 molecule there are three electron pairs .the three electron pairs should acquire trigonal planar arrangement with bond angle 120 ° .Since one of the position is occupied by lone pair the geometry ... to 107 ^0 from 109.5^ 0 and hence the geometry of ammonia is regarded as pryamidal.
Description : What is expected value of ‘i’ for K4[Fe(CN)6] in dilute solution?
Last Answer : Ans:- Expected value of n in K4(Fe(CN)6) is 5.
Description : In Celsius, the freezing point of a one-molal water solution of sodium phosphate, chemical formula Na3PO4, is expected to be: w) - 0.93 degrees Celsius x) - 1.86 degrees Celsius y) - 7.44 degrees Celsius z) - 3.72 degrees Celsius
Last Answer : ANSWER: C -- (- 7.44 DEGREES CELSIUS)
Last Answer : less than 7
Description : Exposure to mixtures of chemicals are greater than expected on the basis of effects of exposure to each chemical individually. This is known as (1) Additives (2) Antagonism (3) Synergism (4) Independent
Last Answer : Synergism