Chemistry
Q. Which of the following d-block elements is used in making alloys?
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A.
Gold
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B.
Silver
-
C.
Nickel
-
D.
Lead
Solution
Nickel (Ni) is commonly used in making various alloys due to its strength and corrosion resistance.
Correct Answer: C — Nickel
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Q. Which of the following elements can form a triple bond? (2022)
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A.
Oxygen
-
B.
Nitrogen
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C.
Carbon
-
D.
Hydrogen
Solution
Nitrogen can form a triple bond, as seen in N2, where three pairs of electrons are shared between the two nitrogen atoms.
Correct Answer: B — Nitrogen
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Q. Which of the following elements has the electronic configuration [Ne]3s²? (2016)
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A.
Sodium
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B.
Magnesium
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C.
Aluminum
-
D.
Silicon
Solution
Magnesium has the electronic configuration [Ne]3s².
Correct Answer: B — Magnesium
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Q. Which of the following elements is a f-block element?
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A.
Uranium
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B.
Titanium
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C.
Zinc
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D.
Copper
Solution
Uranium is an f-block element as it is part of the actinides series.
Correct Answer: A — Uranium
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Q. Which of the following elements is a halogen? (2017) 2017
-
A.
Bromine
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B.
Barium
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C.
Bismuth
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D.
Boron
Solution
Bromine is a halogen, located in group 17 of the periodic table.
Correct Answer: A — Bromine
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Q. Which of the following elements is a metalloid in the p-block? (2022) 2022
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A.
Boron
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B.
Aluminium
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C.
Gallium
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D.
Indium
Solution
Boron is classified as a metalloid in the p-block elements.
Correct Answer: A — Boron
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Q. Which of the following elements is a noble gas? (2021) 2021
-
A.
Oxygen
-
B.
Nitrogen
-
C.
Neon
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D.
Hydrogen
Solution
Neon is a noble gas, which is characterized by its lack of reactivity.
Correct Answer: C — Neon
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Q. Which of the following elements is a p-block element? (2021) 2021
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A.
Sodium
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B.
Calcium
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C.
Aluminium
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D.
Iron
Solution
Aluminium (Al) is in group 13 of the periodic table, which is classified as a p-block element.
Correct Answer: C — Aluminium
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Q. Which of the following elements is known for forming complex ions?
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A.
Calcium
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B.
Copper
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C.
Sodium
-
D.
Magnesium
Solution
Copper (Cu) is known for forming complex ions due to its ability to coordinate with ligands.
Correct Answer: B — Copper
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Q. Which of the following elements is known for its catalytic properties?
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A.
Copper
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B.
Iron
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C.
Platinum
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D.
Zinc
Solution
Platinum (Pt) is widely known for its catalytic properties in various chemical reactions.
Correct Answer: C — Platinum
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Q. Which of the following elements is most likely to form a covalent bond? (2023)
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A.
Sodium
-
B.
Chlorine
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C.
Calcium
-
D.
Potassium
Solution
Chlorine (Cl) is a non-metal and is most likely to form covalent bonds.
Correct Answer: B — Chlorine
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Q. Which of the following elements is most likely to form an anion? (2023)
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A.
Boron
-
B.
Carbon
-
C.
Fluorine
-
D.
Aluminum
Solution
Fluorine (F) is highly electronegative and readily forms anions (F-).
Correct Answer: C — Fluorine
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Q. Which of the following elements is most likely to form an ionic bond? (2023)
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A.
Carbon
-
B.
Oxygen
-
C.
Sodium
-
D.
Nitrogen
Solution
Sodium is most likely to form an ionic bond as it readily loses an electron to form Na+.
Correct Answer: C — Sodium
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Q. Which of the following elements is most likely to form an ionic bond? (2023) 2023
-
A.
Carbon
-
B.
Oxygen
-
C.
Sodium
-
D.
Nitrogen
Solution
Sodium is most likely to form an ionic bond as it readily loses an electron to form Na+.
Correct Answer: C — Sodium
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Q. Which of the following elements is most likely to form covalent bonds? (2023)
-
A.
Sodium
-
B.
Magnesium
-
C.
Chlorine
-
D.
Aluminum
Solution
Chlorine (Cl) is a non-metal and tends to form covalent bonds.
Correct Answer: C — Chlorine
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Q. Which of the following elements is not a p-block element? (2022)
-
A.
Boron
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B.
Carbon
-
C.
Sodium
-
D.
Nitrogen
Solution
Sodium is an s-block element, while Boron, Carbon, and Nitrogen are p-block elements.
Correct Answer: C — Sodium
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Q. Which of the following factors does NOT affect the position of equilibrium? (2023) 2023
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A.
Concentration of reactants
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B.
Temperature
-
C.
Pressure
-
D.
Presence of a catalyst
Solution
A catalyst speeds up the rate of reaching equilibrium but does not affect the position of equilibrium itself.
Correct Answer: D — Presence of a catalyst
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Q. Which of the following factors does NOT affect the rate of a chemical reaction? (2021) 2021
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A.
Concentration of reactants
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B.
Temperature
-
C.
Presence of a catalyst
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D.
Color of the reactants
Solution
The color of the reactants does not affect the rate of a chemical reaction. The other factors directly influence the reaction rate.
Correct Answer: D — Color of the reactants
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Q. Which of the following has the highest bond energy? (2023)
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A.
C-H
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B.
C-C
-
C.
C=N
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D.
C≡C
Solution
C≡C (triple bond) has the highest bond energy due to the strong attraction between the two carbon atoms.
Correct Answer: D — C≡C
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Q. Which of the following has the highest ionization energy? (2020) 2020
Solution
Lithium (Li) has the highest ionization energy among the given options.
Correct Answer: A — Li
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Q. Which of the following has the lowest boiling point? (2023)
-
A.
H2O
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B.
NH3
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C.
CH4
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D.
HF
Solution
CH4 (methane) has the lowest boiling point due to weak London dispersion forces compared to the other molecules.
Correct Answer: C — CH4
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Q. Which of the following hydrocarbons is saturated?
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A.
C2H2
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B.
C3H6
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C.
C4H10
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D.
C5H8
Solution
C4H10 (butane) is a saturated hydrocarbon, containing only single bonds.
Correct Answer: C — C4H10
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Q. Which of the following ions has a d5 configuration?
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A.
Mn2+
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B.
Fe3+
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C.
Cr3+
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D.
V4+
Solution
Mn2+ has a d5 configuration as it loses two electrons from its 4s and 3d orbitals.
Correct Answer: A — Mn2+
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Q. Which of the following ions has a stable octet? (2023)
-
A.
Na+
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B.
Cl-
-
C.
Mg2+
-
D.
All of the above
Solution
All of the ions Na+, Cl-, and Mg2+ have achieved a stable octet configuration.
Correct Answer: D — All of the above
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Q. Which of the following is a bidentate ligand? (2020) 2020
-
A.
NH3
-
B.
EDTA
-
C.
Cl-
-
D.
H2O
Solution
EDTA can form multiple bonds with a metal ion, making it a bidentate ligand as it can attach at two sites.
Correct Answer: B — EDTA
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Q. Which of the following is a carbohydrate? (2023) 2023
-
A.
Glucose
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B.
Amino acid
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C.
Fatty acid
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D.
Nucleotide
Solution
Glucose is a simple sugar and a primary carbohydrate.
Correct Answer: A — Glucose
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Q. Which of the following is a carboxylic acid?
-
A.
C2H5OH
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B.
C3H6O
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C.
C2H4O2
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D.
C3H8
Solution
C2H4O2 (Acetic acid) is a carboxylic acid.
Correct Answer: C — C2H4O2
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Q. Which of the following is a characteristic of adsorption? (2023)
-
A.
It is a bulk phenomenon.
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B.
It is a surface phenomenon.
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C.
It occurs at high temperatures only.
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D.
It is always exothermic.
Solution
Adsorption is a surface phenomenon, as it occurs at the interface between phases.
Correct Answer: B — It is a surface phenomenon.
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Q. Which of the following is a characteristic of elastomers?
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A.
Brittle
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B.
Rigid
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C.
Elastic
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D.
Conductive
Solution
Elastomers are known for their elastic properties, allowing them to stretch and return to their original shape.
Correct Answer: C — Elastic
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Q. Which of the following is a characteristic of unsaturated hydrocarbons?
-
A.
Only single bonds
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B.
Contains double or triple bonds
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C.
Higher boiling points
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D.
Less reactive
Solution
Unsaturated hydrocarbons contain double or triple bonds, making them more reactive than saturated hydrocarbons.
Correct Answer: B — Contains double or triple bonds
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