Chemistry
Biology
Physics
General knowledge
Random questions
100

What is chemical equilibrium?

Chemical equilibrium refers to the state of a system in which the concentration of the reactant and the concentration of the products do not change with time, and the system does not display any further change in properties.

100

Which blood type is the ultimate donor and what letter symbolises it?

First blood type O

100

What is the unit of electrical power?

Watt (W)

100

What is the capital city of Canada?

Ottawa

100

Who invented the light bulb?

Thomas Edison

200

Which of these compounds is the stinkiest?

A) Ozon(O3)

B) Copper Oxide(Cu2O)

C) Hydrogen Sulfide(H2S)

D) Ammonia(NH3)

Correct answer is C

200

What is the function of ribosome?

synthesizes proteins 

200

What force pulls objects toward the center of the Earth?

Gravity

200

What is the chemical symbol for gold?

Au

200

Which continent has the most countries?

Africa

300

Define a catalyst and an inhibitor, tell the difference between them

Catalyst is a substance that increases the rate of a reaction. It changes it by decreasing the activation energy


Inhibitor is a substance that instead slows down a reaction

300

What happens in the cell during interphase?

1. G1, S phase, G2 phases

2. The cell size increases, protein is synthesized, DNA replication

300

What is the formula for calculating force in physics?

Force = Mass × Acceleration (F = m × a)

300

Which is the longest river in the world?

The Nile Rive

300

Which day is celebrated as Earth Day?

April 22

400

In the balanced reaction below, silver nitrate reacted with hydrogen chloride. Find the mass of nitric acid that formed from 22.4 liters of HCL:


HCl + AgNO3 → AgCl + HNO3


Mr(H) = 1     Mr(N) = 14      Mr(O) = 16

Answer: 63

400

Grass - Grasshopper - Rabbit - Fox


In this food chain, if Grass had 2400kJ of energy and following the energy rule, how much does the  secondary consumer get in the end?

24kJ

400

What kind of mirror always produces an upright and reduced image?

Convex mirror

400

Who was the first President of the United States?

  • George Washington

400

What was the name of the first artificial satellite sent into space?

Sputnik 1

500

Balance the equation below, using the oxidation number(redox) method:


S + HNO3 → SO2 + NO2 + H2O


O{-2}

H{+1}

S + 4HNO3 = SO2 + 4NO2 + 2H2O

500

What is the name of the process, where water comes out as vapor. Name at least two of it's functions

Transpiration. 

1. Saves the plant from overheating and helps them cool down.

2. Creates a current from the root to the leaves

3. Transports minerals and water in the plant

500

A car travels 150 km in 3 hours. Then it travels 100 km in 2 hours. What is its average speed for the entire trip?

Average speed = Total distance ÷ Total time = (150 + 100) km ÷ (3 + 2) h = 250 ÷ 5 = 50 km/h

500

Who discovered the sea route to India around the Cape of Good Hope?

Vasco da Gama

500

What ancient civilization built Machu Picchu?

The Inca civilization

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