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Question 1 of 10
1. Question
Ethene when treated with Br2 in the presence of CCl4, the compound formed is?
Correct
CH2= CH2 + Br2 (in the presence of CCl4) = 1,2- dibromoethane. When Alkenes or Alkynes react with Bromine water they decolorize red Bromine thereby, giving an indication that they are unsaturated hydrocarbons. The compound formed is known as 1,2 dibromoethane. CCl4 dissolves Bromine in it forming Bromine water.
Incorrect
CH2= CH2 + Br2 (in the presence of CCl4) = 1,2- dibromoethane. When Alkenes or Alkynes react with Bromine water they decolorize red Bromine thereby, giving an indication that they are unsaturated hydrocarbons. The compound formed is known as 1,2 dibromoethane. CCl4 dissolves Bromine in it forming Bromine water.
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Question 2 of 10
2. Question
Choose the correct option of the following compound in their increasing order of boiling point?
Correct
The alkane (acyclic saturated hydrocarbon) will have the lowest boiling point, followed by the aldehyde (removing hydrogen from alcohol), and then the alcohol (least one hydroxyl functional group (−OH) bound to a saturated carbon atom). The boiling point of the aldehyde is elevated by its dipole, but the boiling point of alcohol is further elevated by hydrogen bonding.
Incorrect
The alkane (acyclic saturated hydrocarbon) will have the lowest boiling point, followed by the aldehyde (removing hydrogen from alcohol), and then the alcohol (least one hydroxyl functional group (−OH) bound to a saturated carbon atom). The boiling point of the aldehyde is elevated by its dipole, but the boiling point of alcohol is further elevated by hydrogen bonding.
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Question 3 of 10
3. Question
During the process of Strecker synthesis, what are the compounds formed?
Correct
Strecker synthesis is a condensation reaction (formation of an imine (a compound containing a carbon–nitrogen double bond) from a carbonyl-containing compound and ammonia (NH3), with loss of water). Strecker synthesis is a method for the synthesis of amino acids by the reaction of an aldehyde with ammonium chloride (NH4Cl) in the presence of potassium cyanide (KCN).
Incorrect
Strecker synthesis is a condensation reaction (formation of an imine (a compound containing a carbon–nitrogen double bond) from a carbonyl-containing compound and ammonia (NH3), with loss of water). Strecker synthesis is a method for the synthesis of amino acids by the reaction of an aldehyde with ammonium chloride (NH4Cl) in the presence of potassium cyanide (KCN).
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Question 4 of 10
4. Question
What happens when an inorganic phosphate when bonded to other phosphate groups in a nucleotide triphosphate?
Correct
Inorganic phosphate (a component of phosphorylated intermediates in pathways) contains a very negative charge. When bonded to other phosphates (PO₄³⁻) groups in a nucleotide triphosphate (a molecule containing a nitrogenous base bound to a 5-carbon sugar), this creates repulsion with adjacent phosphate (PO₄³⁻) groups, increasing the energy of the
Incorrect
Inorganic phosphate (a component of phosphorylated intermediates in pathways) contains a very negative charge. When bonded to other phosphates (PO₄³⁻) groups in a nucleotide triphosphate (a molecule containing a nitrogenous base bound to a 5-carbon sugar), this creates repulsion with adjacent phosphate (PO₄³⁻) groups, increasing the energy of the
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Question 5 of 10
5. Question
Why do enantiomers have identical IR spectra?
Correct
Identical IR spectra in enantiomers (chiral molecules that can be mirror images of one another) are due to the fact they have identical functional groups and could consequently have precisely identical absorption frequencies. Enantiomers (chiral molecules that are mirror images of one another) have opposite specific rotations, but specific rotation actually has no effect on the IR spectrum.
Incorrect
Identical IR spectra in enantiomers (chiral molecules that can be mirror images of one another) are due to the fact they have identical functional groups and could consequently have precisely identical absorption frequencies. Enantiomers (chiral molecules that are mirror images of one another) have opposite specific rotations, but specific rotation actually has no effect on the IR spectrum.
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Question 6 of 10
6. Question
In the presence of red phosphorous, chlorine converts the fatty acids having alpha hydrogen atoms into?
Correct
The propionic acid (naturally occurring carboxylic acid with chemical formula CH₃CH₂CO₂H), in the presence of Cl2/P (Dichlorine/Phosphorus), gets converted into alpha chloro propionic acid (C3H5ClO2) due to the action of the halogen chlorine.
Incorrect
The propionic acid (naturally occurring carboxylic acid with chemical formula CH₃CH₂CO₂H), in the presence of Cl2/P (Dichlorine/Phosphorus), gets converted into alpha chloro propionic acid (C3H5ClO2) due to the action of the halogen chlorine.
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Question 7 of 10
7. Question
Chlorine in the presence of which among the following generates positively charged species?
Correct
Ferric chloride (an inorganic compound with the formula FeCl3 also called Iron(III) chloride) is a lewis acid catalyst and in the presence of chlorine (Cl), it converts nitrobenzene (C6H5NO2) into 3- chloro nitrobenzene.
Incorrect
Ferric chloride (an inorganic compound with the formula FeCl3 also called Iron(III) chloride) is a lewis acid catalyst and in the presence of chlorine (Cl), it converts nitrobenzene (C6H5NO2) into 3- chloro nitrobenzene.
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Question 8 of 10
8. Question
In which among the following alkane, a carbon atom is displaced so as to form a compact structure with the resemblance of a butterfly wing?
Correct
If one of the carbon atoms of cyclobutane (an organic compound with the formula (CH₂)₄) is not displaced, then the C-C bond would be exactly at right angles to each other and they do not form a cyclic structure.
Incorrect
If one of the carbon atoms of cyclobutane (an organic compound with the formula (CH₂)₄) is not displaced, then the C-C bond would be exactly at right angles to each other and they do not form a cyclic structure.
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Question 9 of 10
9. Question
From the following options identify the correct sequence according to the inductive effect.
Correct
As electron-withdrawing substituent is greater in CF3 (Trifluoromethyl radical), it is more stable and CH3 (Trifluoromethyl radical) is the least stable one and hence the sequence.
Incorrect
As electron-withdrawing substituent is greater in CF3 (Trifluoromethyl radical), it is more stable and CH3 (Trifluoromethyl radical) is the least stable one and hence the sequence.
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Question 10 of 10
10. Question
From the following statements choose the statement which does not apply to cycloalkenes.
Correct
Cycloalkenes (alkanes formed into a closed ring with general formula CnH2(n-m)) mostly appear in a liquid state but sometimes they are even found in a solid-state.
Incorrect
Cycloalkenes (alkanes formed into a closed ring with general formula CnH2(n-m)) mostly appear in a liquid state but sometimes they are even found in a solid-state.