Q. Which protein forms the thick filaments in muscle fibers? (2020)
-
A.
A. Actin
-
B.
B. Myosin
-
C.
C. Tropomyosin
-
D.
D. Troponin
Solution
Myosin forms the thick filaments in muscle fibers and interacts with actin during contraction.
Correct Answer: B — B. Myosin
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Q. Which protein is primarily responsible for muscle contraction? (2019)
-
A.
Actin
-
B.
Myosin
-
C.
Tropomyosin
-
D.
Troponin
Solution
Myosin is the primary protein that interacts with actin to facilitate muscle contraction.
Correct Answer: B — Myosin
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Q. Which protocol is used to retrieve emails from a mail server? (2021)
-
A.
SMTP
-
B.
IMAP
-
C.
FTP
-
D.
HTTP
Solution
IMAP (Internet Message Access Protocol) is used to retrieve emails from a mail server.
Correct Answer: B — IMAP
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Q. Which quadrilateral has all sides equal but angles not necessarily equal? (2023)
-
A.
Square
-
B.
Rectangle
-
C.
Rhombus
-
D.
Trapezium
Solution
A rhombus has all sides equal, but the angles are not necessarily equal.
Correct Answer: C — Rhombus
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Q. Which quantum number can have a value of 0?
Solution
The azimuthal quantum number (l) can have a value of 0, which corresponds to an s orbital.
Correct Answer: B — l
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Q. Which quantum number describes the orientation of an orbital in space?
-
A.
Principal quantum number
-
B.
Azimuthal quantum number
-
C.
Magnetic quantum number
-
D.
Spin quantum number
Solution
The magnetic quantum number (m_l) describes the orientation of an orbital in space.
Correct Answer: C — Magnetic quantum number
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Q. Which quantum number describes the orientation of an orbital?
-
A.
Principal quantum number
-
B.
Azimuthal quantum number
-
C.
Magnetic quantum number
-
D.
Spin quantum number
Solution
The magnetic quantum number describes the orientation of an orbital in space.
Correct Answer: C — Magnetic quantum number
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Q. Which quantum number describes the orientation of an orbital? (2020) 2020
-
A.
Principal quantum number
-
B.
Azimuthal quantum number
-
C.
Magnetic quantum number
-
D.
Spin quantum number
Solution
The magnetic quantum number describes the orientation of an orbital.
Correct Answer: C — Magnetic quantum number
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Q. Which quantum number describes the shape of an orbital?
-
A.
Principal quantum number (n)
-
B.
Azimuthal quantum number (l)
-
C.
Magnetic quantum number (m_l)
-
D.
Spin quantum number (m_s)
Solution
The azimuthal quantum number (l) determines the shape of the orbital.
Correct Answer: B — Azimuthal quantum number (l)
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Q. Which quantum number determines the energy level of an electron in an atom?
Solution
The principal quantum number n determines the energy level of an electron in an atom.
Correct Answer: A — n
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Q. Which quantum number determines the orientation of an orbital in space?
Solution
The magnetic quantum number (m_l) determines the orientation of an orbital in space.
Correct Answer: C — m_l
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Q. Which quantum number determines the orientation of an orbital?
-
A.
Principal quantum number (n)
-
B.
Azimuthal quantum number (l)
-
C.
Magnetic quantum number (m_l)
-
D.
Spin quantum number (m_s)
Solution
The magnetic quantum number (m_l) determines the orientation of an orbital.
Correct Answer: C — Magnetic quantum number (m_l)
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Q. Which quantum number determines the shape of an atomic orbital?
-
A.
Principal quantum number (n)
-
B.
Azimuthal quantum number (l)
-
C.
Magnetic quantum number (m_l)
-
D.
Spin quantum number (m_s)
Solution
The azimuthal quantum number (l) determines the shape of the orbital.
Correct Answer: B — Azimuthal quantum number (l)
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Q. Which quantum number is associated with the orientation of an orbital?
-
A.
Principal quantum number (n)
-
B.
Azimuthal quantum number (l)
-
C.
Magnetic quantum number (m_l)
-
D.
Spin quantum number (m_s)
Solution
The magnetic quantum number (m_l) describes the orientation of an orbital in space.
Correct Answer: C — Magnetic quantum number (m_l)
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Q. Which quantum number is not allowed to be negative?
-
A.
Principal quantum number (n)
-
B.
Azimuthal quantum number (l)
-
C.
Magnetic quantum number (m)
-
D.
Spin quantum number (s)
Solution
The principal quantum number (n) cannot be negative; it must be a positive integer.
Correct Answer: A — Principal quantum number (n)
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Q. Which quantum number is not required to describe the electron in an atom? (2019)
-
A.
Principal quantum number
-
B.
Azimuthal quantum number
-
C.
Magnetic quantum number
-
D.
Color quantum number
Solution
Color quantum number is not a valid quantum number for describing electrons in an atom.
Correct Answer: D — Color quantum number
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Q. Which quarter showed the lowest overall sales across all products according to the table?
Solution
Q1 showed the lowest overall sales across all products.
Correct Answer: A — Q1
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Q. Which reaction involves the addition of water to an alkene?
-
A.
Hydrogenation
-
B.
Hydrolysis
-
C.
Hydration
-
D.
Dehydration
Solution
The addition of water to an alkene is called hydration.
Correct Answer: C — Hydration
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Q. Which reaction is characteristic of alcohols? (2020)
-
A.
Dehydration
-
B.
Hydrogenation
-
C.
Halogenation
-
D.
Oxidation
Solution
Dehydration is a characteristic reaction of alcohols where they lose water to form alkenes.
Correct Answer: A — Dehydration
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Q. Which reaction is characteristic of alkenes?
-
A.
Hydrogenation
-
B.
Halogenation
-
C.
Hydrolysis
-
D.
Oxidation
Solution
Alkenes readily undergo halogenation due to the presence of a double bond.
Correct Answer: B — Halogenation
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Q. Which reaction is characteristic of alkynes?
-
A.
Hydrogenation
-
B.
Halogenation
-
C.
Hydrohalogenation
-
D.
All of the above
Solution
Alkynes can undergo hydrogenation, halogenation, and hydrohalogenation.
Correct Answer: D — All of the above
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Q. Which reaction is characteristic of carboxylic acids? (2021)
-
A.
Esterification
-
B.
Hydrogenation
-
C.
Halogenation
-
D.
Dehydration
Solution
Esterification is a characteristic reaction of carboxylic acids, where they react with alcohols to form esters.
Correct Answer: A — Esterification
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Q. Which reaction is commonly used to convert alkynes to alkenes?
-
A.
Hydrogenation
-
B.
Halogenation
-
C.
Hydroboration
-
D.
Dehydrohalogenation
Solution
Hydrogenation is used to convert alkynes to alkenes.
Correct Answer: A — Hydrogenation
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Q. Which reaction is used to convert alkenes to alkanes?
-
A.
Hydrogenation
-
B.
Halogenation
-
C.
Hydrolysis
-
D.
Dehydrogenation
Solution
Hydrogenation is the process of adding hydrogen to alkenes to convert them into alkanes.
Correct Answer: A — Hydrogenation
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Q. Which reaction is used to prepare alkynes from alkenes?
-
A.
Hydrogenation
-
B.
Dehydrohalogenation
-
C.
Hydrohalogenation
-
D.
Halogenation
Solution
Dehydrohalogenation of vicinal dihalides can be used to prepare alkynes from alkenes.
Correct Answer: B — Dehydrohalogenation
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Q. Which reaction is used to prepare amines from alkyl halides? (2020)
-
A.
Nitration
-
B.
Hydrogenation
-
C.
Nucleophilic substitution
-
D.
Electrophilic substitution
Solution
Amines can be prepared from alkyl halides through nucleophilic substitution reactions where the amine acts as a nucleophile.
Correct Answer: C — Nucleophilic substitution
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Q. Which reaction is used to prepare amines from alkyl halides? (2020) 2020
-
A.
Hydrogenation
-
B.
Nucleophilic substitution
-
C.
Electrophilic substitution
-
D.
Dehydrohalogenation
Solution
Amines can be prepared from alkyl halides through nucleophilic substitution reactions, where the halide is replaced by an amine group.
Correct Answer: B — Nucleophilic substitution
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Q. Which reaction is used to prepare amines from nitriles? (2020)
-
A.
Hydrogenation
-
B.
Reduction
-
C.
Alkylation
-
D.
Dehydration
Solution
Nitriles can be converted to amines through reduction, typically using hydrogen in the presence of a catalyst.
Correct Answer: B — Reduction
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Q. Which reaction is used to prepare carboxylic acids from alcohols? (2020)
-
A.
Oxidation
-
B.
Reduction
-
C.
Hydrolysis
-
D.
Dehydration
Solution
Oxidation of alcohols leads to the formation of carboxylic acids.
Correct Answer: A — Oxidation
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Q. Which reaction is used to prepare primary amines from alkyl halides? (2022)
-
A.
Reduction
-
B.
Hydrolysis
-
C.
Nucleophilic substitution
-
D.
Dehydrohalogenation
Solution
Primary amines can be prepared from alkyl halides through nucleophilic substitution reactions with ammonia.
Correct Answer: C — Nucleophilic substitution
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