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Question 1 of 10
1. Question
Choose the correct option of the following compounds in their decreasing order of electronegativity?
Correct
Electronegativity decreases in classes from the backside to the pinnacle and will increase over time from left to right. The maximum electronegative detail is, therefore, fluorine, even as francium is one of the least electronegative elements.
Incorrect
Electronegativity decreases in classes from the backside to the pinnacle and will increase over time from left to right. The maximum electronegative detail is, therefore, fluorine, even as francium is one of the least electronegative elements.
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Question 2 of 10
2. Question
From the following options choose the correct statement which does not apply to receptor proteins.
Correct
Receptors are a unique class of proteins that characteristic via way of means of binding a selected ligand molecule. When a ligand binds to its receptor, the receptor can alternate conformation, transmitting a sign into the molecular. In a few cases, the receptors will stay at the surface of the molecular and the ligand will ultimately diffuse away.
Incorrect
Receptors are a unique class of proteins that characteristic via way of means of binding a selected ligand molecule. When a ligand binds to its receptor, the receptor can alternate conformation, transmitting a sign into the molecular. In a few cases, the receptors will stay at the surface of the molecular and the ligand will ultimately diffuse away.
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Question 3 of 10
3. Question
Choose the correct option of the following compound in their increasing order of nucleophilicity.
Correct
Nucleophilicity will increase because the density of the negative rate will increase. An anion is constantly a higher nucleophile than an impartial molecule, so the conjugate base is constantly a higher nucleophile. A pretty electronegative atom is a negative nucleophile due to the fact it’s far unwilling to percentage its electrons. I⁻ is a pleasant nucleophile due to the fact it may donate electrons easily.
Incorrect
Nucleophilicity will increase because the density of the negative rate will increase. An anion is constantly a higher nucleophile than an impartial molecule, so the conjugate base is constantly a higher nucleophile. A pretty electronegative atom is a negative nucleophile due to the fact it’s far unwilling to percentage its electrons. I⁻ is a pleasant nucleophile due to the fact it may donate electrons easily.
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Question 4 of 10
4. Question
The correct option in their ascending order of adsorption of the following gases on the same mass of charcoal at the same temperature and pressure is
Correct
The volume of adsorption will increase with an increase in polarity and molar mass. Here, the lesser the important temperature of gases lesser can be the volume of adsorption.
Critical temperature:- The temperature at which gases are liquified is known as important temperature.
Critical temperature order (in K) H2 < CH4 < SO2.Incorrect
The volume of adsorption will increase with an increase in polarity and molar mass. Here, the lesser the important temperature of gases lesser can be the volume of adsorption.
Critical temperature:- The temperature at which gases are liquified is known as important temperature.
Critical temperature order (in K) H2 < CH4 < SO2. -
Question 5 of 10
5. Question
Choose the correct statement which does not apply in the case of Biomolecules.
Correct
Denaturation defines the unfolding or breaking apart of a protein, modifying its well-known 3-dimensional structure. Proteins can be denatured with the aid of using a chemical action, heat or agitation inflicting a protein to spread or its polypeptide chains to come to be disordered generally leaving the molecules
Incorrect
Denaturation defines the unfolding or breaking apart of a protein, modifying its well-known 3-dimensional structure. Proteins can be denatured with the aid of using a chemical action, heat or agitation inflicting a protein to spread or its polypeptide chains to come to be disordered generally leaving the molecules
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Question 6 of 10
6. Question
From the following which is the commercial method of preparation of Chlorobenzene?
Correct
An industrial technique for making chlorobenzene (C6H5Cl)(and phenol) via way of means of a gas-section response among benzene (C₆H₆) vapor, hydrogen chloride (HCl), and oxygen (O)(air) at 230°C. The catalyst is copper(II) chloride (CuCl2).
2C6H6 (benzene) + 2HCl (hydrogen chloride) + O2 → 2H2O + 2C6H5ClIncorrect
An industrial technique for making chlorobenzene (C6H5Cl)(and phenol) via way of means of a gas-section response among benzene (C₆H₆) vapor, hydrogen chloride (HCl), and oxygen (O)(air) at 230°C. The catalyst is copper(II) chloride (CuCl2).
2C6H6 (benzene) + 2HCl (hydrogen chloride) + O2 → 2H2O + 2C6H5Cl -
Question 7 of 10
7. Question
Which of the following compounds gives primary alcohol upon reaction with phenylmagnesium bromide?
Correct
Ethylene oxide reacts with Grignard reagents to give, after protonation, number one alcohols with extra carbon atoms. Reacting a Grignard reagent with an aldehyde offers secondary alcohol.
Incorrect
Ethylene oxide reacts with Grignard reagents to give, after protonation, number one alcohols with extra carbon atoms. Reacting a Grignard reagent with an aldehyde offers secondary alcohol.
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Question 8 of 10
8. Question
Which of the following reagents, when treated with phenyl magnesium bromide followed by acid workup, will yield 2-phenyl ethanol?
Correct
When is handled Diethylether with phenyl magnesium bromide observed with the aid of using acid workup, will yield 2-phenyl ethanol.
Grignard reagents are made with the aid of using including the halogenoalkane to small bits of magnesium in a flask containing ethoxyethane (generally known as diethyl ether or just “ether”). The flask is equipped with a reflux condenser, and the combination is warmed over a water bath for 20 – 30 minutes.
CH3CH2Br + Mg (magnesium)+ Diethyl ether ((C2H5)2O) → CH3CH2MgBr
Everything ought to be flawlessly dry due to the fact Grignard reagents (RMgX, where X is a halogen, and R is an alkyl or aryl (based on a benzene ring) group.) react with water.Incorrect
When is handled Diethylether with phenyl magnesium bromide observed with the aid of using acid workup, will yield 2-phenyl ethanol.
Grignard reagents are made with the aid of using including the halogenoalkane to small bits of magnesium in a flask containing ethoxyethane (generally known as diethyl ether or just “ether”). The flask is equipped with a reflux condenser, and the combination is warmed over a water bath for 20 – 30 minutes.
CH3CH2Br + Mg (magnesium)+ Diethyl ether ((C2H5)2O) → CH3CH2MgBr
Everything ought to be flawlessly dry due to the fact Grignard reagents (RMgX, where X is a halogen, and R is an alkyl or aryl (based on a benzene ring) group.) react with water. -
Question 9 of 10
9. Question
From the following compounds which would not give tert-butyl alcohol when treated with excess methylmagnesium bromide?
Correct
Acetaldehyde (C2H4O) could now no longer provide tert-butyl alcohol (C₄H₁₀O) while dealing with extra methylmagnesium bromide, because the Grignard Reaction is the addition of an organomagnesium halide [R2Hg] (Grignard reagent) to a ketone (a functional group with the structure R₂C=O) or aldehyde (a functional group with the structure −CHO), to shape tertiary or secondary alcohol, respectively.
Incorrect
Acetaldehyde (C2H4O) could now no longer provide tert-butyl alcohol (C₄H₁₀O) while dealing with extra methylmagnesium bromide, because the Grignard Reaction is the addition of an organomagnesium halide [R2Hg] (Grignard reagent) to a ketone (a functional group with the structure R₂C=O) or aldehyde (a functional group with the structure −CHO), to shape tertiary or secondary alcohol, respectively.
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Question 10 of 10
10. Question
From the following which step is not used in the fermentation of starch into ethyl alcohol?
Correct
Conversion of sucrose into glucose and fructose by sucrase present in yeast steps is not used in the fermentation of starch into ethyl alcohol.
Incorrect
Conversion of sucrose into glucose and fructose by sucrase present in yeast steps is not used in the fermentation of starch into ethyl alcohol.