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Question 1 of 10
1. Question
Which of the following is correct about the atomic and ionic radii of the alkaline earth metals?
Correct
The atomic and ionic radii of the alkaline earth metals (named after their oxides) are smaller than corresponding alkali metals in the same periods due to the increased nuclear charge in these elements.
Incorrect
The atomic and ionic radii of the alkaline earth metals (named after their oxides) are smaller than corresponding alkali metals in the same periods due to the increased nuclear charge in these elements.
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Question 2 of 10
2. Question
From the following options choose which is the composition of vinegar?
Correct
5-8% solution of acetic acid (systematically named ethanoic acid, is a colorless liquid organic compound with the chemical formula CH₃COOH) in water is called vinegar and is used widely as a preservative in pickles.
Incorrect
5-8% solution of acetic acid (systematically named ethanoic acid, is a colorless liquid organic compound with the chemical formula CH₃COOH) in water is called vinegar and is used widely as a preservative in pickles.
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Question 3 of 10
3. Question
What can we predict about the magnetic nature of a doubly occupied molecule?
Correct
The Molecular orbital electronic configuration can be used to predict the magnetic nature of the molecule. If all the MO’s are doubly occupied the substance shows diamagnetic behavior and if one or more MO’s are singly occupied the substance shows paramagnetic behavior.
Incorrect
The Molecular orbital electronic configuration can be used to predict the magnetic nature of the molecule. If all the MO’s are doubly occupied the substance shows diamagnetic behavior and if one or more MO’s are singly occupied the substance shows paramagnetic behavior.
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Question 4 of 10
4. Question
What do we call the difference between the initial mass-energy and the total mass-energy of the decay products in a radioactive decay?
Correct
The disintegration energy or the Q-value (qi = pi N / I) of a nuclear reaction (one or more nuclides are produced from the collisions between two atomic nuclei or one atomic nucleus and a subatomic particle) is the difference between the initial mass-energy and the overall mass-energy of the decay products.
Incorrect
The disintegration energy or the Q-value (qi = pi N / I) of a nuclear reaction (one or more nuclides are produced from the collisions between two atomic nuclei or one atomic nucleus and a subatomic particle) is the difference between the initial mass-energy and the overall mass-energy of the decay products.
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Question 5 of 10
5. Question
Which of the following chemical is produced when Ethene reacts with the cold aqueous solution of Bayer’s reagent?
Correct
Alkenes (hydrocarbon that contains a carbon-carbon double bond) on reaction with cold, dilute, the aqueous solution of potassium permanganate (Baeyer’s reagent) produce vicinal glycols (two hydroxyl groups occupy vicinal positions). In the case of vicinal diol, the 2 hydroxyl groups occupy vicinal positions, that is, they may be connected to adjoining atoms. These compounds are known as glycols.
Incorrect
Alkenes (hydrocarbon that contains a carbon-carbon double bond) on reaction with cold, dilute, the aqueous solution of potassium permanganate (Baeyer’s reagent) produce vicinal glycols (two hydroxyl groups occupy vicinal positions). In the case of vicinal diol, the 2 hydroxyl groups occupy vicinal positions, that is, they may be connected to adjoining atoms. These compounds are known as glycols.
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Question 6 of 10
6. Question
Which of the following molecules choose the molecule that will not show the infrared spectrum?
Correct
The correct option is H2 (Molecular hydrogen). Since H2 (Molecular hydrogen) does not have a dynamic dipole moment as HH2, so no spectrum will be observed.
Incorrect
The correct option is H2 (Molecular hydrogen). Since H2 (Molecular hydrogen) does not have a dynamic dipole moment as HH2, so no spectrum will be observed.
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Question 7 of 10
7. Question
From the following which notation is not used to distinguish between pairs of enantiomers?
Correct
All four of these notations are used to distinguish between isomers ( molecules or polyatomic ions with identical molecular formulas), but only three are used specifically in the context of enantiomers (chiral molecules that are mirror images of one another). The fourth – E and Z – is used to differentiate between geometric isomers, not enantiomers (chiral molecules that are mirror images of one another).
Incorrect
All four of these notations are used to distinguish between isomers ( molecules or polyatomic ions with identical molecular formulas), but only three are used specifically in the context of enantiomers (chiral molecules that are mirror images of one another). The fourth – E and Z – is used to differentiate between geometric isomers, not enantiomers (chiral molecules that are mirror images of one another).
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Question 8 of 10
8. Question
Name the polymers with Z groups only on one side of the carbon chain?
Correct
Isotactic polymers (responsible for substantial areas of crystallinity) are composed of isotactic macromolecules (consists of 100% meso diads). In isotactic Macromolecules (includes 100% meso diads), all of the substituents are positioned at the identical facet of the macromolecular backbone (Eg: Polypropylene formed by Ziegler–Natta).
Incorrect
Isotactic polymers (responsible for substantial areas of crystallinity) are composed of isotactic macromolecules (consists of 100% meso diads). In isotactic Macromolecules (includes 100% meso diads), all of the substituents are positioned at the identical facet of the macromolecular backbone (Eg: Polypropylene formed by Ziegler–Natta).
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Question 9 of 10
9. Question
From the following statements choose the correct one regarding carboxylic acids.
Correct
Carboxylic acids do not undergo polymerization reactions (the process by which monomers are transformed into a polymer). A carboxylic acid is an organic acid that contains a carboxyl group (a functional group consisting of a carbon atom that’s double-bonded to an oxygen atom and singly bonded to a hydroxyl group) attached to an R-group. The widespread method of a carboxylic acid is R–COOH, with R regarding the alkyl, alkenyl, aryl, or different groups.
Incorrect
Carboxylic acids do not undergo polymerization reactions (the process by which monomers are transformed into a polymer). A carboxylic acid is an organic acid that contains a carboxyl group (a functional group consisting of a carbon atom that’s double-bonded to an oxygen atom and singly bonded to a hydroxyl group) attached to an R-group. The widespread method of a carboxylic acid is R–COOH, with R regarding the alkyl, alkenyl, aryl, or different groups.
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Question 10 of 10
10. Question
Arrange the following in their increasing order of stretching frequencies for C ≡ C, C = C and C — C?
Correct
From the equation, v ∝ √k, k→ Force constant. Force constant trend is
Triple bond > Double bond > Single bond.
C ≡ C > C = C > C — C.Incorrect
From the equation, v ∝ √k, k→ Force constant. Force constant trend is
Triple bond > Double bond > Single bond.
C ≡ C > C = C > C — C.