Explanation Fertilizers are substances added to soil to provide essential nutrients for plant growth, making up for any deficiencies in the soil.

Explanation Hydrocarbon compounds are typically derived from fossil fuels and consist of hydrogen and carbon atoms. Examples include fuels like gasoline, natural gas, and propane , as well as waxes like candle wax and paraffin wax.

Explanation When fuel is burned , carbon dioxide gas (CO₂) is primarily produced. The combustion of fuel , particularly hydrocarbons, typically results in the formation of carbon dioxide and water vapor (H₂O).

Explanation Melting of ice is a physical change , as it only involves a change in state (from solid to liquid) without a change in chemical composition. The examples of chemical changes: Burning of fuel Explosion of firework Burning of wood Cooking of food (breakfast, lunch, dinner) Bursting of crackers Burning of wax Rusting of iron Heating sulphur with iron fillings (to produce iron sulphide) Digestion of food Respiration in living things Photosynthesis in plants

Explanation A chemical change , also known as a chemical reaction. It is a process that alters the composition of one or more substances, resulting in the formation of new substances with different properties.

Explanation A change in physical appearance or state of a substance , such as a change in shape, size, color, or phase (solid, liquid, gas), is called a Physical Change. The are examples of Physical Changes: Melting (ice cream, wax, chocolate, ice and change from solid to liquid ) Phase changes ( boiling, freezing, condensation ) Crushing (chalk) Tearing (paper) Crumpling (aluminium foil) Stretching (rubber band) Mixing (sugar in water) Dissolving (sugar, salt in water) Moulding (clay, metals) Slicing (fruit) Forming of frost (from water vapors) Transition to a gas (change from liquid to gas) Change of durability (change in texture or strength) Changes to crystal form (change in crystal structure)

Explanation Capital of Lubnan is Beirut Currency _ Lebanese pound Explanation Capital of Iran_Tehran Currency_ rial Explanation Located on the Taedong river Capital and largest city of North Korea Explanation Capital of Nigeria: Abuja  Currency: Naira Explanation Capital of South Korea: Seoul North Korea: Pyongyang Explanation Explanation Explanation Explanation The word "drama" originates from Ancient Greek.  It comes from the Greek word "δρᾶμα" (drâma), meaning "a deed, action, dramatic performance, play, dramatic event," which in turn is derived from "δράω" (dráō), meaning "to act, to take action, to achieve".  Explanation

Explanation Capital of Lubnan is Beirut Currency _ Lebanese pound Explanation Capital of Iran_Tehran Currency_ rial Explanation Located on the Taedong river Capital and largest city of North Korea Explanation Capital of Nigeria: Abuja  Currency: Naira Explanation Capital of South Korea: Seoul North Korea: Pyongyang Explanation Explanation Explanation Explanation The word "drama" originates from Ancient Greek.  It comes from the Greek word "δρᾶμα" (drâma), meaning "a deed, action, dramatic performance, play, dramatic event," which in turn is derived from "δράω" (dráō), meaning "to act, to take action, to achieve".  Explanation

Explanation In solids, heat transfer occurs primarily through conduction , where vibrations and collisions of particles (atoms or molecules) transfer energy from one point to another.

Explanation Pakistan has a federal parliamentary system , where powers are shared between the federal government and provinces. The Prime Minister is the head of government , elected by the National Assembly .