Q. Which of the following describes the relationship between pressure and volume of a gas at constant temperature?
-
A.
Charles's Law
-
B.
Boyle's Law
-
C.
Avogadro's Law
-
D.
Ideal Gas Law
Solution
Boyle's Law states that the pressure of a gas is inversely proportional to its volume at constant temperature.
Correct Answer: B — Boyle's Law
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Q. Which of the following devices is based on the principle of a p-n junction? (2023)
-
A.
Resistor
-
B.
Capacitor
-
C.
LED
-
D.
Inductor
Solution
A Light Emitting Diode (LED) is based on the principle of a p-n junction, emitting light when current flows through it.
Correct Answer: C — LED
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Q. Which of the following devices operates on the principle of electromagnetic induction? (2019)
-
A.
Electric motor
-
B.
Generator
-
C.
Transformer
-
D.
All of the above
Solution
All of the above devices operate on the principle of electromagnetic induction.
Correct Answer: D — All of the above
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Q. Which of the following devices uses electromagnetic induction? (2019)
-
A.
Electric motor
-
B.
Battery
-
C.
Resistor
-
D.
Capacitor
Solution
An electric motor uses electromagnetic induction to convert electrical energy into mechanical energy.
Correct Answer: A — Electric motor
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Q. Which of the following devices uses the magnetic effects of current? (2023)
-
A.
Electric motor
-
B.
Battery
-
C.
Resistor
-
D.
Capacitor
Solution
An electric motor operates based on the magnetic effects of current, converting electrical energy into mechanical energy.
Correct Answer: A — Electric motor
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Q. Which of the following devices uses the principle of electromagnetic induction? (2022)
-
A.
Transformer
-
B.
Resistor
-
C.
Capacitor
-
D.
Diode
Solution
A transformer uses the principle of electromagnetic induction to transfer electrical energy between circuits.
Correct Answer: A — Transformer
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Q. Which of the following devices uses the principle of electromagnetism? (2019)
-
A.
Electric motor
-
B.
Thermometer
-
C.
Barometer
-
D.
Hydrometer
Solution
An electric motor operates on the principle of electromagnetism, converting electrical energy into mechanical energy.
Correct Answer: A — Electric motor
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Q. Which of the following diseases is caused by a protozoan? (2023)
-
A.
Malaria
-
B.
Tuberculosis
-
C.
HIV/AIDS
-
D.
Hepatitis
Solution
Malaria is caused by protozoan parasites of the genus Plasmodium.
Correct Answer: A — Malaria
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Q. Which of the following diseases is characterized by the destruction of insulin-producing cells? (2022)
-
A.
Type 1 Diabetes
-
B.
Type 2 Diabetes
-
C.
Hypertension
-
D.
Obesity
Solution
Type 1 Diabetes is characterized by the autoimmune destruction of insulin-producing beta cells in the pancreas.
Correct Answer: A — Type 1 Diabetes
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Q. Which of the following diseases is characterized by the presence of a rash? (2019)
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A.
Diabetes
-
B.
Measles
-
C.
Hypertension
-
D.
Asthma
Solution
Measles is characterized by a distinctive rash along with other symptoms.
Correct Answer: B — Measles
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Q. Which of the following domains includes organisms that are primarily unicellular and prokaryotic? (2023)
-
A.
Eukarya
-
B.
Archaea
-
C.
Bacteria
-
D.
Both Bacteria and Archaea
Solution
Both Bacteria and Archaea are domains that include primarily unicellular and prokaryotic organisms.
Correct Answer: D — Both Bacteria and Archaea
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Q. Which of the following domains includes prokaryotic organisms? (2022)
-
A.
Eukarya
-
B.
Bacteria
-
C.
Archaea
-
D.
Both Bacteria and Archaea
Solution
Both Bacteria and Archaea are domains that include prokaryotic organisms, which lack a nucleus.
Correct Answer: D — Both Bacteria and Archaea
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Q. Which of the following ecosystems has the highest biodiversity? (2020)
-
A.
Desert
-
B.
Tundra
-
C.
Tropical rainforest
-
D.
Grassland
Solution
Tropical rainforests have the highest biodiversity among ecosystems due to their warm climate and abundant rainfall.
Correct Answer: C — Tropical rainforest
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Q. Which of the following ecosystems is characterized by high biodiversity? (2021)
-
A.
Desert
-
B.
Tundra
-
C.
Tropical rainforest
-
D.
Grassland
Solution
Tropical rainforests are known for their high biodiversity due to favorable climatic conditions.
Correct Answer: C — Tropical rainforest
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Q. Which of the following elements belongs to the lanthanide series? (2023)
-
A.
Uranium
-
B.
Neodymium
-
C.
Rutherfordium
-
D.
Plutonium
Solution
Neodymium (Nd) is a lanthanide element, while the others belong to different series.
Correct Answer: B — Neodymium
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Q. Which of the following elements can form a triple bond? (2022)
-
A.
Oxygen
-
B.
Nitrogen
-
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 does not form a stable +4 oxidation state? (2023)
-
A.
Carbon
-
B.
Silicon
-
C.
Germanium
-
D.
Lead
Solution
Lead does not form a stable +4 oxidation state; it is more stable in the +2 state.
Correct Answer: D — Lead
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Q. Which of the following elements does not form a stable oxide? (2023)
-
A.
Carbon
-
B.
Silicon
-
C.
Germanium
-
D.
Lead
Solution
Lead does not form a stable oxide in the same way as the other elements listed.
Correct Answer: D — Lead
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Q. Which of the following elements has the electron configuration [Ne]3s²3p⁵? (2023)
-
A.
Fluorine
-
B.
Chlorine
-
C.
Bromine
-
D.
Iodine
Solution
The electron configuration [Ne]3s²3p⁵ corresponds to Chlorine, which has 17 electrons.
Correct Answer: B — Chlorine
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Q. Which of the following elements has the electronic configuration [Ne]3s²? (2016)
-
A.
Sodium
-
B.
Magnesium
-
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 has the highest ionization energy in the alkali metal group? (2023)
-
A.
Lithium
-
B.
Sodium
-
C.
Potassium
-
D.
Rubidium
Solution
Lithium (Li) has the highest ionization energy among the alkali metals due to its smaller atomic size.
Correct Answer: A — Lithium
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Q. Which of the following elements has the highest melting point among the alkali metals? (2023)
-
A.
Lithium
-
B.
Sodium
-
C.
Potassium
-
D.
Rubidium
Solution
Lithium (Li) has the highest melting point among the alkali metals due to its smaller size and stronger metallic bonding.
Correct Answer: A — Lithium
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Q. Which of the following elements is a f-block element?
-
A.
Uranium
-
B.
Titanium
-
C.
Zinc
-
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
-
B.
Barium
-
C.
Bismuth
-
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 member of the alkali metals? (2020)
-
A.
Magnesium
-
B.
Sodium
-
C.
Calcium
-
D.
Barium
Solution
Sodium (Na) is an alkali metal, while Magnesium (Mg), Calcium (Ca), and Barium (Ba) are alkaline earth metals.
Correct Answer: B — Sodium
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Q. Which of the following elements is a member of the alkaline earth metals? (2021)
-
A.
Sodium
-
B.
Calcium
-
C.
Aluminum
-
D.
Iron
Solution
Calcium is a member of the alkaline earth metals, which are found in Group 2 of the periodic table.
Correct Answer: B — Calcium
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Q. Which of the following elements is a metalloid in the p-block? (2022) 2022
-
A.
Boron
-
B.
Aluminium
-
C.
Gallium
-
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
-
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
-
A.
Sodium
-
B.
Calcium
-
C.
Aluminium
-
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 considered a micronutrient? (2023)
-
A.
Calcium
-
B.
Magnesium
-
C.
Iron
-
D.
Nitrogen
Solution
Iron is classified as a micronutrient, required in smaller amounts compared to macronutrients.
Correct Answer: C — Iron
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