Science
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Acids Bases and Salts
Carbon and Its Compounds
Chemical Reactions and Equations
Control and Coordination
Electricity
Heredity and Evolution
How do Organisms Reproduce
Life Processes
Light Reflection and Refraction
Magnetic Effects of Electric Current
Management of Natural Resources
Metals and Non-Metals
Our Environment
The Human Eye and the Colourful World
Q. A certain species of plant can reproduce sexually and produces 5 seeds per flower. If there are 8 flowers, how many seeds are produced in total?
Q. A certain type of bacteria can reproduce every 15 minutes. If you start with 2 bacteria, how many will there be after 1 hour?
Q. A city plans to plant 10,000 trees over 4 years. If they plant an equal number of trees each year, how many trees will they plant per year?
Q. A conservation project aims to reduce carbon emissions by 40% over 5 years. If the current emissions are 500 tons, what will be the target emissions after 5 years?
Q. A farmer uses 200 liters of water to irrigate 1 hectare of land. How much water will he need for 5 hectares?
Q. A forest covers 60% of a region. If the total area of the region is 500 square kilometers, what is the area covered by the forest?
Q. A rabbit population doubles every 3 months. If there are initially 10 rabbits, how many will there be after 1 year?
Q. A renewable energy plant produces 1500 kWh of energy per day. How much energy will it produce in a week?
Q. A single cell organism reproduces by binary fission every 30 minutes. How many cells will there be after 3 hours starting with 1 cell?
Q. A species of insect lays 150 eggs, and 60% of them survive to adulthood. How many insects reach adulthood?
Q. How many moles of carbon are in 24 grams of carbon dioxide?
Q. If 10 grams of carbon are burned in excess oxygen, how many grams of carbon dioxide are produced?
Q. If 50 mL of 0.1 M NaOH is mixed with 50 mL of 0.1 M HCl, what will be the resulting pH?
Q. If a bacterium divides every 20 minutes, how many bacteria will there be after 2 hours starting with 1 bacterium?
Q. If a certain fish species lays 200 eggs and 80% of them hatch successfully, how many fish will survive?
Q. If a city recycles 25% of its waste and the total waste generated is 400 tons, how much waste is recycled?
Q. If a country has 30% of its land area as protected natural reserves and the total land area is 1,000,000 square kilometers, what is the area of the protected reserves?
Q. If a plant can produce 4 new shoots every year and starts with 2 shoots, how many shoots will there be after 5 years?
Q. If a single organism reproduces asexually and produces 3 offspring every month, how many offspring will there be after 4 months?
Q. If a solar panel generates 250 watts of power and operates for 5 hours a day, how much energy does it produce in a day in kilowatt-hours?
Q. If a tree produces 50 acorns each year and 10% of them grow into new trees, how many new trees will grow after 3 years?
Q. If a water reservoir has a capacity of 1,200,000 liters and is filled at a rate of 15,000 liters per hour, how many hours will it take to fill the reservoir completely?
Q. In 2021, which country successfully tested a new magnetic propulsion system for spacecraft?
Q. In 2021, which scientist was awarded the Nobel Prize for their work related to magnetic materials?
Q. In 2022, which country announced a new initiative to develop magnetic levitation technology for trains?
Q. What does the QRS complex represent in an ECG?
Q. What is defibrillation used for?
Q. What is the basic unit of heredity in living organisms?
Q. What is the concentration of hydroxide ions in a solution with a pH of 11?
Q. What is the effect called when a current-carrying conductor is placed in a magnetic field?