Description : Which of the following compounds loses optical activity due to pyramidal inversion?
Last Answer : Which of the following compounds loses optical activity due to pyramidal inversion? A. B. C. D.
Description : Which of the following compounds can show Optical isomerism as well as geometrical isomerism?
Last Answer : Which of the following compounds can show Optical isomerism as well as geometrical isomerism? A. B. C. D.
Description : Which of the following isomeric compounds show optical isomerism : (a) 1-Aminopentane (b) 2-Aminopentane (c) 3-Aminopentane (d) 2,2-Dimethylpropylamine
Last Answer : 2-Aminopentane
Description : Which of the followin ratios are in descending order?
Last Answer : Which of the followin ratios are in descending order? A. `9:13,7:9,8:11,11:14` B. `11:14,8:11,7:9,9:13` C. ... :9,8:11,9:13` D. `9:13,8:11,7:9,11:14`
Description : Which of the followin is an example of an installation?
Last Answer : The placement of a poem on a city train
Description : Which of the followin sentences is written in the first person?
Last Answer : I see leaves swirling to and fro on the sidewalk.
Description : Which of the followin describes the third-person point of view?
Last Answer : A character outside the story narrates.
Description : Which of the followin was an early style of polyphony(apex)?
Last Answer : Organum
Description : A prokaryotic cell does not have which of the followin (1) Ribosomes (2) Cell membrane (3) Nucleus (4) DNA
Last Answer : (3) Nucleus Explanation: Prokaryotic cells do not contain a nucleus or any other membrane-bound organelle. The word "prokaryotic" means "before nucleus." Prokaryotes include two groups: ... another group called archaea. In contrast, eukatyotic cells have etrue" nucleus containing their DNA.
Description : When followin When following a utilization strategy g a utilization strategy, which alternative relie , which alternative relies on external sources of s on external sources of production? a)Overtime/undertime b)Subcontracting c)Back orders d)Stock outs
Last Answer : b)Subcontracting
Description : A linear programm A linear programming model CANNOT be used when whic ing model CANNOT be used when which of the followin h of the following are true? g are true? a)An optimal ... set of linear constraints may be defined d)Cross product relationships exist between two or more decision variables
Last Answer : d)Cross product relationships exist between two or more decision variables
Description : Most cave deposits form from which of the followin minerals? w) hematite x) calcite y) quartz z) none of these
Last Answer : ANSWER: X -- CALCITE
Description : Hematite is a primary ore of which of the followin metals? w) zinc x) tungsten y) iron z) none of the above
Last Answer : ANSWER: Y -- IRON
Description : (i) Total number of tractions on fractional distillation of I, II and III. (ii) Optical active compounds. (iii) Relation between I and II. (iv) Relati
Last Answer : (i) Total number of tractions on fractional distillation of I, II and III. (ii) Optical active compounds. ... and II. (iv) Relation between I and II.
Description : Compounds having the same structural formula but differing in spatial configuration are known as (A) Stereoisomers (B) Anomers (C) Optical isomers (D) Epimers
Last Answer : A
Description : Optical isomers that are not mirror images are called (a) Diastereomers (b) Enantiomers (c) Metamers (d) Meso compounds
Last Answer : Diastereomers
Description : The compounds CH3CH2OCH2CH3 and CH3OCH2CH2CH3 are (a) Enantiomers (b) Conformational isomers (c) Metamers (d) Optical isomers
Last Answer : Metamers
Last Answer : (A) Stereoisomers
Description : The instrument which can be used to measure optical activity, i.e., specific rotation:
Last Answer : The instrument which can be used to measure optical activity, i.e., specific rotation: A. Refractometer B. Photometer C. Voltmeter D. Polarimeter
Description : The α-Helix is held in a coiled conformation partially because of : (a) Optical activity (b) Hydrogen bonding (c) Resonance (d) Delocalization
Last Answer : Hydrogen bonding
Description : Which of the statements below correctly describes an achiral molecule? (a) The molecule has a nonsuperimposable mirror image. (b) The molecule exhibits optical activity when it interacts with plane-polarized light. (c) The molecule has an enantiomer. (d) The molecule might be a meso form
Last Answer : The molecule might be a meso form
Description : Optical activity is a/an __________ property. (A) Additive (B) Constitutive (C) Both (A) & (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) & (B)
Description : Template/lock and key theory of enzyme action is supported by (A) Enzymes speed up reaction (B) Enzymes occur in living beings and speed up certain reactions (C) Enzymes determine the direction of reaction (D) Compounds similar to substrate inhibit enzyme activity
Last Answer : Answer : D
Description : The compounds which inhibit the activity of auxins are known as: a. Auxin antagonists b. Antiauxins c. Epinostic agent d. All of above
Last Answer : Antiauxins
Description : The catalytic activity of transition metals and their compounds is ascribed mainly to (1) their chemical reactivity (2) their magnetic behaviour (3) their unfilled d-orbitals (4) their ability to adopt variable oxidation states
Last Answer : (4) their ability to adopt variable oxidation states
Description : Which of the following statements best describes a lead compound? a) A compound that contains the element lead b) A compound from the research laboratory that is chosen to go forward for preclinical and ... of a drug. d) The first compound of a structural class of compounds to reach the market.
Last Answer : c) A molecule that shows some activity or property of interest and serves as the starting point for the development of a drug.
Description : Which of the following will show optical isomerism? .
Last Answer : Which of the following will show optical isomerism? . A. `[Cu(NH_(3))_(4)]^(2+)` B. `[ZnCl_(4)]^(2-)` C. `[Cr( ... )_(3)]^(3-)` D. `[Co(CN)_(6)]^(3-)`
Description : (a) Show on a diagram the transfer of electrons between the atoms in the formation of MgO. Write symbols of cation and anion present in MgO. (b) Name the solvent in which ionic compounds are generally soluble. (c) Why are aqueous solutions of ionic compounds able to conduct electricity? -Chemistry
Last Answer : (b) Ionic compounds are soluble in water. (c) It is because aqueous solutions consist of ions which can move freely in them and carry current.
Description : (a) Show the formation of Na2O by the transfer of electrons between the combining atoms. (b) Why are ionic compounds usually hard? (c) How is it that ionic compounds in the solid state do not conduct electricity but they do so when in molten state? -Chemistry
Last Answer : (b) It is due to strong force of attraction between oppositely charged ions. (c) In solid state, ions are not free to move whereas in molten state ions are free to move, therefore, they conduct electricity in molten state.
Description : Which of the following compounds can show geometrical isomerism : (i) Pent-1-ene (ii) 1-chloropropene (iii) 2-Methylbut-2-ene (iv) `CH_(3)-CH=CH-CH_(3
Last Answer : Which of the following compounds can show geometrical isomerism : (i) Pent-1-ene (ii) 1-chloropropene (iii) 2- ... -ene (iv) `CH_(3)-CH=CH-CH_(3)`
Description : In given compounds how many can show geometrical isomerism : ,
Last Answer : In given compounds how many can show geometrical isomerism : ,
Description : Which one of the following compounds will show enantiomerism ?
Last Answer : Which one of the following compounds will show enantiomerism ? A. B. C. D.
Description : Which of the following compounds will not show geometrical isomerism :
Last Answer : Which of the following compounds will not show geometrical isomerism : A. Azomethane B. 1-Bromo-2-chloroethene C. 1-Phenylpropene D. 2-Methyl-2-butene
Description : Explain the following , giving reason . (a) Transition metal and many of their compounds show paramagnetic behavior (b) The enthalpy of atomisation of the transition metal is high . (c) The Transition metal generally form coloured compounds .
Last Answer : Ans(a) It is due to unpaired electrons . (b) It is due to strong metallic bond and additional Covalent bonds due to presence of unpaired electron in d- orbitals (c) It is due to presence of unpaired electrons ,they undergo d-d transition .
Description : Which of the following compounds will show geometrical isomerism? (a) Propene (b) 2-Butene (c) Propyne (d) 2-Butyne
Last Answer : 2-Butene
Description : Which of the following compounds will show geometrical isomerism? (a) CH2=CHCl2 (b) ClCH=CHBr (c) CH2=CHCl (d) Cl2C=CBr2
Last Answer : ClCH=CHBr
Description : Which of the following compounds show geometrical isomerism (a) (CH3)3N (b) CH3CH=CH2 (c) (CH3)2NH (d) CH3CH=CHCH
Last Answer : CH3CH=CHCH
Description : Which of the following compounds will show dipole moment? (a) cis-1,2-dichloroethylene (b) o-dichlorobenzene (c) trans-1,2-dichloroethylene (d) p-dichlorobenzene
Last Answer : cis-1,2-dichloroethylene o-dichlorobenzene