Q. Which of the following orbitals is the highest in energy?
Solution
The 3d orbital is higher in energy than the 4s orbital due to its shape and electron repulsion.
Correct Answer: D — 3d
Learn More →
Q. Which of the following orbits allows a satellite to cover the entire surface of the Earth over time?
-
A.
Geostationary orbit
-
B.
Polar orbit
-
C.
Circular orbit
-
D.
Elliptical orbit
Solution
A polar orbit allows a satellite to pass over the entire surface of the Earth as the Earth rotates beneath it.
Correct Answer: B — Polar orbit
Learn More →
Q. Which of the following orbits is used for weather satellites?
-
A.
Geostationary orbit
-
B.
Polar orbit
-
C.
Elliptical orbit
-
D.
Low Earth orbit
Solution
Weather satellites typically use polar orbits to cover the entire surface of the Earth as the planet rotates beneath them.
Correct Answer: B — Polar orbit
Learn More →
Q. Which of the following organelles contains chlorophyll? (2022)
-
A.
Mitochondria
-
B.
Chloroplast
-
C.
Nucleus
-
D.
Golgi apparatus
Solution
Chloroplasts contain chlorophyll, which is essential for photosynthesis in plant cells.
Correct Answer: B — Chloroplast
Learn More →
Q. Which of the following organelles contains digestive enzymes? (2023)
-
A.
Peroxisome
-
B.
Lysosome
-
C.
Ribosome
-
D.
Vesicle
Solution
Lysosomes contain digestive enzymes that break down waste materials and cellular debris.
Correct Answer: B — Lysosome
Learn More →
Q. Which of the following organelles is involved in photosynthesis? (2022)
-
A.
Mitochondria
-
B.
Chloroplast
-
C.
Ribosome
-
D.
Golgi apparatus
Solution
Chloroplasts are the organelles responsible for photosynthesis in plant cells, converting light energy into chemical energy.
Correct Answer: B — Chloroplast
Learn More →
Q. Which of the following organisms can reproduce both sexually and asexually? (2023)
-
A.
Fungi
-
B.
Starfish
-
C.
Hydra
-
D.
All of the above
Solution
Many organisms, including fungi, starfish, and Hydra, can reproduce both sexually and asexually depending on environmental conditions.
Correct Answer: D — All of the above
Learn More →
Q. Which of the following organisms is an example of a cnidarian? (2021)
-
A.
Jellyfish
-
B.
Earthworm
-
C.
Lobster
-
D.
Starfish
Solution
Jellyfish belong to the phylum Cnidaria, which is known for its stinging cells called cnidocytes.
Correct Answer: A — Jellyfish
Learn More →
Q. Which of the following organisms is classified as a prokaryote? (2019)
-
A.
Yeast
-
B.
E. coli
-
C.
Mushroom
-
D.
Paramecium
Solution
E. coli is a prokaryotic organism, while the others are eukaryotic.
Correct Answer: B — E. coli
Learn More →
Q. Which of the following organisms is classified under the kingdom Protista? (2022)
-
A.
Mushrooms
-
B.
Euglena
-
C.
Lichens
-
D.
Corals
Solution
Euglena is classified under the kingdom Protista, which includes diverse unicellular organisms.
Correct Answer: B — Euglena
Learn More →
Q. Which of the following organisms is known for regeneration as a form of asexual reproduction? (2021)
-
A.
Starfish
-
B.
Elephant
-
C.
Bird
-
D.
Cat
Solution
Starfish can regenerate lost arms, which is a form of asexual reproduction.
Correct Answer: A — Starfish
Learn More →
Q. Which of the following organisms reproduces asexually by budding? (2021)
-
A.
Hydra
-
B.
Frog
-
C.
Human
-
D.
Mango tree
Solution
Hydra reproduces asexually by the process of budding, where a new individual develops from an outgrowth of the parent.
Correct Answer: A — Hydra
Learn More →
Q. Which of the following organisms reproduces by budding? (2023)
-
A.
Planaria
-
B.
Hydra
-
C.
Bacteria
-
D.
Fungi
Solution
Budding is a form of asexual reproduction seen in organisms like Hydra, where a new individual develops from an outgrowth.
Correct Answer: B — Hydra
Learn More →
Q. Which of the following organisms reproduces by fragmentation? (2022)
-
A.
Starfish
-
B.
Mammals
-
C.
Birds
-
D.
Fungi
Solution
Starfish can reproduce by fragmentation, where a part of the organism can grow into a new individual.
Correct Answer: A — Starfish
Learn More →
Q. Which of the following organisms reproduces by parthenogenesis? (2022)
-
A.
Honeybee
-
B.
Frog
-
C.
Lizard
-
D.
Human
Solution
Honeybees can reproduce by parthenogenesis, where an egg develops into an organism without fertilization.
Correct Answer: A — Honeybee
Learn More →
Q. Which of the following organisms reproduces sexually? (2023)
-
A.
Bacteria
-
B.
Fungi
-
C.
Mammals
-
D.
All of the above
Solution
Mammals reproduce sexually, while bacteria typically reproduce asexually, and fungi can reproduce both sexually and asexually.
Correct Answer: C — Mammals
Learn More →
Q. Which of the following organisms reproduces through parthenogenesis? (2020)
-
A.
Honeybee
-
B.
Frog
-
C.
Human
-
D.
Goldfish
Solution
Honeybees can reproduce through parthenogenesis, where unfertilized eggs develop into new individuals.
Correct Answer: A — Honeybee
Learn More →
Q. Which of the following organizations focuses on the promotion of human rights globally?
-
A.
World Health Organization (WHO)
-
B.
United Nations Human Rights Council (UNHRC)
-
C.
International Monetary Fund (IMF)
-
D.
World Trade Organization (WTO)
Solution
The UNHRC is responsible for promoting and protecting human rights around the world.
Correct Answer: B — United Nations Human Rights Council (UNHRC)
Learn More →
Q. Which of the following oxides is amphoteric? (2019)
-
A.
Na2O
-
B.
MgO
-
C.
Al2O3
-
D.
SiO2
Solution
Al2O3 is an amphoteric oxide, reacting with both acids and bases.
Correct Answer: C — Al2O3
Learn More →
Q. Which of the following p-block elements has the highest electronegativity?
-
A.
Fluorine
-
B.
Oxygen
-
C.
Nitrogen
-
D.
Chlorine
Solution
Fluorine has the highest electronegativity among all elements.
Correct Answer: A — Fluorine
Learn More →
Q. Which of the following p-block elements is a metalloid?
-
A.
Boron
-
B.
Carbon
-
C.
Silicon
-
D.
Phosphorus
Solution
Boron is a metalloid among the p-block elements.
Correct Answer: A — Boron
Learn More →
Q. Which of the following p-block elements is essential for life?
-
A.
Arsenic
-
B.
Phosphorus
-
C.
Bismuth
-
D.
Lead
Solution
Phosphorus is essential for life, particularly in DNA and ATP.
Correct Answer: B — Phosphorus
Learn More →
Q. Which of the following p-block elements is essential for plant growth?
-
A.
Boron
-
B.
Lead
-
C.
Arsenic
-
D.
Bismuth
Solution
Boron is an essential micronutrient for plant growth.
Correct Answer: A — Boron
Learn More →
Q. Which of the following p-block elements is known for forming a stable +4 oxidation state?
-
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 p-block elements is known for forming stable +3 oxidation state?
-
A.
Bismuth
-
B.
Lead
-
C.
Tin
-
D.
Thallium
Solution
Thallium is known for forming a stable +3 oxidation state.
Correct Answer: D — Thallium
Learn More →
Q. Which of the following p-block elements is known for forming stable +3 oxidation state compounds?
-
A.
Aluminum
-
B.
Silicon
-
C.
Carbon
-
D.
Lead
Solution
Aluminum commonly forms stable +3 oxidation state compounds.
Correct Answer: A — Aluminum
Learn More →
Q. Which of the following pairs are both f-block elements?
-
A.
Uranium and Thorium
-
B.
Lanthanum and Cerium
-
C.
Neodymium and Plutonium
-
D.
Zirconium and Hafnium
Solution
Neodymium (Nd) and Plutonium (Pu) are both f-block elements.
Correct Answer: C — Neodymium and Plutonium
Learn More →
Q. Which of the following pairs are enantiomers?
-
A.
D-Glucose and L-Glucose
-
B.
C2H6 and C2H5OH
-
C.
n-Butane and Isobutane
-
D.
C3H8 and C3H6
Solution
D-Glucose and L-Glucose are mirror images of each other, making them enantiomers.
Correct Answer: A — D-Glucose and L-Glucose
Learn More →
Q. Which of the following pairs are f-block elements? (2023)
-
A.
Zinc and Cadmium
-
B.
Lanthanum and Cerium
-
C.
Iron and Cobalt
-
D.
Copper and Silver
Solution
Lanthanum (La) and Cerium (Ce) are both f-block elements, belonging to the lanthanide series.
Correct Answer: B — Lanthanum and Cerium
Learn More →
Q. Which of the following pairs are structural isomers?
-
A.
Cis-2-butene and trans-2-butene
-
B.
1-pentanol and 2-pentanol
-
C.
Ethylene and acetylene
-
D.
Glucose and galactose
Solution
1-pentanol and 2-pentanol differ in the position of the hydroxyl group, making them structural isomers.
Correct Answer: B — 1-pentanol and 2-pentanol
Learn More →
Showing 18211 to 18240 of 19578 (653 Pages)