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
Learn More →
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
Learn More →
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
Learn More →
Q. Which of the following diseases is characterized by the presence of a rash? (2019)
-
A.
Diabetes
-
B.
Measles
-
C.
Hypertension
-
D.
Asthma
Solution
Measles is characterized by a distinctive rash along with other symptoms.
Correct Answer: B — Measles
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
Q. Which of the following ecosystems is known for the highest biodiversity? (2020)
-
A.
Desert
-
B.
Tundra
-
C.
Tropical rainforest
-
D.
Grassland
Solution
Tropical rainforests are known for having the highest biodiversity among ecosystems.
Correct Answer: C — Tropical rainforest
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
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
Learn More →
Q. Which of the following elements is considered a secondary macronutrient? (2023)
-
A.
Iron
-
B.
Calcium
-
C.
Zinc
-
D.
Manganese
Solution
Calcium is classified as a secondary macronutrient, important for cell wall structure and stability.
Correct Answer: B — Calcium
Learn More →
Q. Which of the following elements is known for forming a stable +3 oxidation state? (2023)
-
A.
Aluminium
-
B.
Gallium
-
C.
Indium
-
D.
Thallium
Solution
Aluminium commonly forms a stable +3 oxidation state in its compounds.
Correct Answer: A — Aluminium
Learn More →
Q. Which of the following elements is known for forming a stable +4 oxidation state? (2023)
-
A.
Carbon
-
B.
Silicon
-
C.
Germanium
-
D.
Tin
Solution
Tin (Sn) is known for forming a stable +4 oxidation state.
Correct Answer: D — Tin
Learn More →
Q. Which of the following elements is known for its ability to form complex ions? (2022)
-
A.
Copper
-
B.
Calcium
-
C.
Sodium
-
D.
Barium
Solution
Copper (Cu) is known for its ability to form complex ions due to its d-orbitals.
Correct Answer: A — Copper
Learn More →
Q. Which of the following elements is not an alkali metal? (2023)
-
A.
Lithium
-
B.
Sodium
-
C.
Potassium
-
D.
Aluminum
Solution
Aluminum (Al) is not an alkali metal; it is a post-transition metal.
Correct Answer: D — Aluminum
Learn More →
Q. Which of the following elements is not an alkaline earth metal? (2023)
-
A.
Beryllium
-
B.
Magnesium
-
C.
Aluminum
-
D.
Calcium
Solution
Aluminum (Al) is not an alkaline earth metal; it is a post-transition metal.
Correct Answer: C — Aluminum
Learn More →
Q. Which of the following enzymes is secreted by the pancreas? (2020)
-
A.
Pepsin
-
B.
Amylase
-
C.
Trypsin
-
D.
Both Amylase and Trypsin
Solution
Both amylase and trypsin are enzymes secreted by the pancreas to aid in digestion.
Correct Answer: D — Both Amylase and Trypsin
Learn More →
Q. Which of the following equations represents Bernoulli's principle?
-
A.
P + 1/2 ρv² + ρgh = constant
-
B.
P = ρgh
-
C.
F = ma
-
D.
V = IR
Solution
Bernoulli's principle is represented by the equation P + 1/2 ρv² + ρgh = constant, relating pressure, velocity, and height in a fluid.
Correct Answer: A — P + 1/2 ρv² + ρgh = constant
Learn More →
Q. Which of the following f-block elements is used in making strong permanent magnets? (2022)
-
A.
Cerium
-
B.
Neodymium
-
C.
Plutonium
-
D.
Uranium
Solution
Neodymium is used in making strong permanent magnets, known as neodymium magnets.
Correct Answer: B — Neodymium
Learn More →
Q. Which of the following factors does NOT affect the gravitational force between two objects? (2021)
-
A.
Mass of the objects
-
B.
Distance between the objects
-
C.
Shape of the objects
-
D.
Gravitational constant
Solution
The shape of the objects does not affect the gravitational force; only mass and distance do.
Correct Answer: C — Shape of the objects
Learn More →
Q. Which of the following factors does NOT affect the gravitational force between two masses? (2023)
-
A.
Mass of the first object
-
B.
Mass of the second object
-
C.
Distance between the objects
-
D.
Color of the objects
Solution
The color of the objects does not affect the gravitational force between them.
Correct Answer: D — Color of the objects
Learn More →
Q. Which of the following factors does NOT affect the rate of transpiration? (2022)
-
A.
Humidity
-
B.
Temperature
-
C.
Wind speed
-
D.
Soil type
Solution
Soil type does not directly affect the rate of transpiration; however, it can influence water availability.
Correct Answer: D — Soil type
Learn More →
Q. Which of the following factors does NOT affect the tensile strength of a material? (2022)
-
A.
Temperature
-
B.
Material composition
-
C.
Length of the specimen
-
D.
Cross-sectional area
Solution
The length of the specimen does not affect tensile strength; it is an intrinsic property of the material.
Correct Answer: C — Length of the specimen
Learn More →
Showing 2071 to 2100 of 2979 (100 Pages)