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General Science

General Science - Important Points


36. What is the process by which a liquid changes to a gas?

A. Freezing

B. Melting

C. Vaporization

D. Condensation

Discuss Work Space

Answer: option c

Explanation:

Vaporization is the process by which a liquid changes to a gas. Freezing is the process by which a liquid changes to a solid, and melting is the process by which a solid changes to a liquid.

37. Which of the following is a type of non-renewable energy?

A. Solar

B. Wind

C. Coal

D. Hydroelectric

Discuss Work Space

Answer: option c

Explanation:

Coal is a type of non-renewable energy, along with oil and natural gas. Solar and wind energy are renewable, as is hydroelectric energy.

38. Which of the following is a type of chemical bond that involves the sharing of electrons?

A. Ionic bond

B. Covalent bond

C. Metallic bond

D. Hydrogen bond

Discuss Work Space

Answer: option b

Explanation:

A covalent bond is a type of chemical bond that involves the sharing of electrons between atoms. Ionic bonds involve the transfer of electrons, metallic bonds involve the sharing of electrons among a sea of atoms

39. What is the name of the process by which plants convert sunlight into energy?

A. Respiration

B. Photosynthesis

C. Fermentation

D. Digestion

Discuss Work Space

Answer: option b

Explanation:

Photosynthesis is the process by which plants convert sunlight into energy, using carbon dioxide and water.

40. Which of the following is a type of electromagnetic radiation that has the longest wavelength?

A. Ultraviolet radiation

B. X-rays

C. Gamma rays

D. Radio waves

Discuss Work Space

Answer: option d

Explanation:

Radio waves have the longest wavelength of any type of electromagnetic radiation.


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