CCE 5 years Past Papers Clickhere

Explanation

• Butter melts faster than ghee.
• Because it contains more water and milk solids, making its structure less stable.
• Water in butter lowers its melting stability at room temperature.
• This makes butter softer and quicker to melt.

Additional information:

• Ghee is almost pure fat with no water content.
• Ghee remains more stable because it is more refined.

Last verified on 14-06-2026

Explanation

• Zinc is commonly used in toothpaste.
• Because it helps reduce bacterial growth and controls bad breath.
• Zinc compounds (like zinc citrate or zinc chloride) kill or inhibit oral bacteria.
• It also helps reduce plaque formation.
• This improves overall oral hygiene.

Last verified on 14-06-2026

Explanation

• Bread rises faster in a warm kitchen because heat increases yeast activity (respiration).
• Yeast produces more carbon dioxide gas in warm conditions.
• This gas forms bubbles that make dough expand.
• In cold temperatures, yeast works slowly.

Last verified on 14-06-2026

Explanation

• Pressure cookers cook food faster due to Gay-Lussac’s Law.
• This law states that pressure increases when temperature increases in a closed container.
• In a pressure cooker, steam is trapped, increasing pressure.
• Higher pressure raises the boiling point of water above 100°C.
• Food cooks at a higher temperature, so it cooks faster.

Last verified on 14-06-2026

Explanation

• Soap lathers better in soft water because hard water contains calcium (Ca²⁺) and magnesium (Mg²⁺) ions that react with soap to form insoluble salts.
• These salts reduce soap’s ability to produce foam.
• Soft water does not contain these ions, so soap works fully.
• More soap remains active in soft water for lather formation.

Last verified on 14-06-2026

Explanation

• Charles’s Law is best shown by a balloon shrinking in a freezer. 
• Because gas volume decreases when temperature decreases.
• When air inside the balloon gets cold, its molecules move slowly.
• This reduces pressure and volume of the gas.
• Warm conditions expand gas, cold conditions contract it.

Last verified on 14-06-2026

Explanation

• Cold water quenches thirst better because it reduces mouth temperature and stimulates nerve endings, giving a stronger refreshing feeling.
• This signals the brain that hydration is occurring.
• The cooling effect provides immediate relief from dryness.
• Warm water does not create this strong sensory response.
• That is why cold water feels more satisfying when thirsty.

Last verified on 14-06-2026

Explanation

• The bodyguard of the Earth is Jupiter, which protects Earth from many comets and asteroids due to its strong gravity.
• Jupiter attracts or deflects space objects that might otherwise hit Earth.
• It is the largest planet in the solar system.
• Its strong gravitational field acts like a “shield” for inner planets.
• That is why it is often called Earth’s protector.

Last verified on 14-06-2026

Explanation

• Mount Chimborazo is the point on Earth farthest from the Earth’s centre.
• This is because Earth is an oblate spheroid (bulged at the equator).
• Chimborazo is located near the equator in Ecuador.
• Itis about 6,384 km from Earth’s center (approx.).

Last verified on 14-06-2026

Explanation

• The sunset on Mars appears blue due to how dust scatters sunlight.
• Mars has a thin atmosphere filled with fine dust particles.
• These particles scatter red light away and allow blue light near the sun’s direction.
• This creates a bluish glow around sunset and sunrise.
• It is opposite to Earth’s red/orange sunsets.

Last verified on 14-06-2026