Explanation

• Kc is the equilibrium constant based on concentration.
• A small Kc means equilibrium favors the reactants.
• Therefore, more reactants remain at equilibrium.
• Only a small amount of products is formed.
• A large Kc  indicates that equilibrium favors the products.

Explanation

• Evaporation can occur at any temperature
• Doesn't require a boiling point
• Happens at the surface of a liquid
• Increases with higher temperature, greater surface area, and lower humidity

Explanation

The word "Mile" does not belong to the list because it measures distance,

whereas the other three items measure length or area.

اس کا یہی جواب درست ہے پلیز  اس پر کمنٹ مت کریں

Explanation

In the given list, "Ton" does not belong to the others.

 inch, feet, and centimeters all are units of length

while, "Ton" is a unit of weight or mass, not length. A ton is a unit of measurement

Explanation

• Kinematics is the study of motion.
• It describes position, velocity, and acceleration.
• It does not focus on the forces causing motion.
• Examples include linear motion, circular motion, and projectile motion.

Additional information

• Mechanics → broad branch of physics dealing with motion and forces.
• Dynamics → studies motion and the forces causing it.

Explanation

• White light from the sun contains all colors of the spectrum
• The green leaf absorbs all colors except green
• It reflects green light back to your eyes
• Your eyes detect the reflected green light, making the leaf appear green

Explanation

• Smelting is a metallurgical process used to extract metals from ores.
• The ore is heated to a high temperature.
• A reducing agent is often used to remove oxygen from the metal oxide.
• The metal is separated from the impurities (gangue).
• Example: Iron is extracted from iron ore by smelting in a blast furnace.

Explanation

The initial setting of cement is caused by:

• Hydration of Tricalcium Aluminate (C₃A).
• Reaction of C₃A with water, which starts rapidly after mixing.
• Formation of calcium aluminate hydrates, causing the paste to stiffen.
• Gypsum is added to slow down this reaction and prevent flash setting.

Explanation

• Thermometry is the measurement of temperature
• A device used to measure temperature is called a thermometer.
• Common temperature scales are Celsius, Fahrenheit, and Kelvin.
• Temperature indicates how hot or cold a body is.
• The SI unit of temperature is Kelvin (K).

Explanation

• Groundwater pollution occurs when harmful substances enter underground water.
• Pollutants can come from industrial waste, fertilizers, pesticides, and sewage.
• These substances can seep through the soil and into groundwater recharge areas.