Chemistry
Q. What is the specific heat capacity of water? (2021) 2021
-
A.
1 J/g°C
-
B.
4.18 J/g°C
-
C.
2 J/g°C
-
D.
0.9 J/g°C
Solution
The specific heat capacity of water is approximately 4.18 J/g°C.
Correct Answer: B — 4.18 J/g°C
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Q. What is the standard electrode potential of the half-reaction Zn²⁺ + 2e⁻ → Zn?
-
A.
0.76 V
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B.
0.34 V
-
C.
-0.76 V
-
D.
-0.34 V
Solution
The standard electrode potential for Zn²⁺/Zn is -0.76 V.
Correct Answer: C — -0.76 V
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Q. What is the standard electrode potential of the hydrogen electrode? (2023) 2023
-
A.
0 V
-
B.
1 V
-
C.
2 V
-
D.
0.5 V
Solution
The standard electrode potential of the hydrogen electrode is defined as 0 V.
Correct Answer: A — 0 V
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Q. What is the structure of a nucleotide?
-
A.
Sugar, phosphate, and base
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B.
Amino group, carboxyl group, and side chain
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C.
Glycerol and fatty acids
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D.
Monosaccharides
Solution
A nucleotide consists of a sugar, a phosphate group, and a nitrogenous base.
Correct Answer: A — Sugar, phosphate, and base
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Q. What is the symbol for Gold?
Solution
The symbol for Gold is Au.
Correct Answer: A — Au
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Q. What is the term for a solution that contains the maximum amount of solute that can dissolve at a given temperature? (2022)
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A.
Unsaturated solution
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B.
Saturated solution
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C.
Supersaturated solution
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D.
Concentrated solution
Solution
A saturated solution is one that contains the maximum amount of solute that can dissolve at a specific temperature.
Correct Answer: B — Saturated solution
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Q. What is the term for the energy required to change a substance from solid to liquid?
-
A.
Heat of fusion
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B.
Heat of vaporization
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C.
Sublimation energy
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D.
Latent heat
Solution
The heat of fusion is the energy required to change a substance from solid to liquid.
Correct Answer: A — Heat of fusion
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Q. What is the term for the energy required to separate an adsorbate from an adsorbent? (2023)
-
A.
Adsorption energy
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B.
Desorption energy
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C.
Activation energy
-
D.
Bond energy
Solution
Desorption energy is the energy required to separate an adsorbate from an adsorbent.
Correct Answer: B — Desorption energy
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Q. What is the term for the maximum amount of solute that can be adsorbed on a surface? (2021)
-
A.
Saturation point
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B.
Adsorption capacity
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C.
Equilibrium constant
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D.
Surface tension
Solution
The maximum amount of solute that can be adsorbed on a surface is referred to as the adsorption capacity.
Correct Answer: B — Adsorption capacity
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Q. What is the term for the process where a solid adsorbs a liquid or gas? (2022)
-
A.
Absorption
-
B.
Adsorption
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C.
Desorption
-
D.
Sorption
Solution
Adsorption is the process where a solid attracts and holds molecules of a liquid or gas on its surface.
Correct Answer: B — Adsorption
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Q. What is the total number of moles in 2 liters of a 3 M solution? (2022)
-
A.
3 moles
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B.
6 moles
-
C.
1.5 moles
-
D.
4 moles
Solution
Moles = Molarity * Volume = 3 mol/L * 2 L = 6 moles.
Correct Answer: B — 6 moles
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Q. What is the Tyndall effect? (2023)
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A.
Scattering of light by particles
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B.
Absorption of light by particles
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C.
Reflection of light by particles
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D.
Refraction of light by particles
Solution
The Tyndall effect is the scattering of light by colloidal particles, making the path of the light visible.
Correct Answer: A — Scattering of light by particles
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Q. What is the unit of electrical conductivity? (2023)
-
A.
Ohm
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B.
Siemens
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C.
Volt
-
D.
Ampere
Solution
The unit of electrical conductivity is Siemens (S).
Correct Answer: B — Siemens
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Q. What is the unit of the rate constant for a first-order reaction? (2023)
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A.
M/s
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B.
M²/s
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C.
s⁻¹
-
D.
M⁻¹s⁻¹
Solution
The unit of the rate constant for a first-order reaction is s⁻¹.
Correct Answer: C — s⁻¹
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Q. What is the valency of Magnesium? (2015)
Solution
Magnesium has a valency of 2, as it can lose two electrons.
Correct Answer: B — 2
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Q. What is the valency of Oxygen? (2021)
Solution
Oxygen has a valency of 2, as it needs two electrons to complete its outer shell.
Correct Answer: B — 2
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Q. What is the value of the azimuthal quantum number (l) for a d orbital? (2021) 2021
Solution
The azimuthal quantum number l for d orbitals is 2.
Correct Answer: C — 2
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Q. What is the value of the azimuthal quantum number (l) for a p-orbital? (2015)
Solution
The azimuthal quantum number (l) for a p-orbital is 1.
Correct Answer: B — 1
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Q. What is the volume of 0.2 M NaOH required to neutralize 0.1 M HCl in 250 mL? (2020)
-
A.
125 mL
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B.
250 mL
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C.
500 mL
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D.
100 mL
Solution
Using the formula M1V1 = M2V2, (0.1 M)(0.25 L) = (0.2 M)(V2). V2 = 0.125 L = 125 mL.
Correct Answer: A — 125 mL
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Q. What is the volume of 1 M HCl solution needed to obtain 0.5 moles of HCl? (2022)
-
A.
0.5 L
-
B.
1 L
-
C.
2 L
-
D.
0.25 L
Solution
Volume = moles / molarity = 0.5 moles / 1 M = 0.5 L.
Correct Answer: A — 0.5 L
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Q. What is the volume of 1 mole of an ideal gas at STP? (2019) 2019
-
A.
22.4 L
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B.
24 L
-
C.
1 L
-
D.
10 L
Solution
At STP, 1 mole of an ideal gas occupies 22.4 liters.
Correct Answer: A — 22.4 L
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Q. What is the volume of a 2 M NaOH solution needed to obtain 4 moles of NaOH? (2021) 2021
-
A.
2 L
-
B.
1 L
-
C.
0.5 L
-
D.
4 L
Solution
Volume (L) = moles / molarity = 4 moles / 2 M = 2 L.
Correct Answer: A — 2 L
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Q. What is the work done by an ideal gas during an isothermal expansion from volume V1 to V2 at temperature T? (2021)
-
A.
nRT ln(V2/V1)
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B.
nRT (V2 - V1)
-
C.
PV
-
D.
0
Solution
The work done during an isothermal expansion is given by W = nRT ln(V2/V1).
Correct Answer: A — nRT ln(V2/V1)
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Q. What is the work done by an ideal gas during isothermal expansion? (2021)
-
A.
0
-
B.
nRT ln(Vf/Vi)
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C.
nRT (Vf - Vi)
-
D.
nR (Tf - Ti)
Solution
For an ideal gas undergoing isothermal expansion, the work done is given by W = nRT ln(Vf/Vi).
Correct Answer: B — nRT ln(Vf/Vi)
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Q. What type of adsorption is characterized by the formation of a chemical bond? (2019)
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A.
Physisorption
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B.
Chemisorption
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C.
Desorption
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D.
Multilayer adsorption
Solution
Chemisorption is characterized by the formation of a chemical bond between the adsorbate and the surface.
Correct Answer: B — Chemisorption
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Q. What type of biomolecule is RNA? (2014)
-
A.
Protein
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B.
Carbohydrate
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C.
Nucleic Acid
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D.
Lipid
Solution
RNA is classified as a nucleic acid, which plays a crucial role in protein synthesis.
Correct Answer: C — Nucleic Acid
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Q. What type of bond is formed between sodium (Na) and chlorine (Cl) in NaCl? (2019)
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A.
Covalent bond
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B.
Ionic bond
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C.
Metallic bond
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D.
Hydrogen bond
Solution
NaCl is formed by the transfer of an electron from sodium to chlorine, resulting in an ionic bond.
Correct Answer: B — Ionic bond
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Q. What type of bond is formed when two atoms share electrons? (2023)
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A.
Ionic bond
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B.
Covalent bond
-
C.
Metallic bond
-
D.
Hydrogen bond
Solution
A covalent bond is formed when two atoms share electrons to achieve stability.
Correct Answer: B — Covalent bond
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Q. What type of bond is formed when two atoms share electrons? (2023) 2023
-
A.
Ionic bond
-
B.
Covalent bond
-
C.
Metallic bond
-
D.
Hydrogen bond
Solution
A covalent bond is formed when two atoms share electrons to achieve stability.
Correct Answer: B — Covalent bond
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Q. What type of bond is present in a carbon-carbon double bond?
-
A.
Single bond
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B.
Double bond
-
C.
Triple bond
-
D.
Quadruple bond
Solution
A carbon-carbon double bond consists of one sigma bond and one pi bond, making it a double bond.
Correct Answer: B — Double bond
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