Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

The law of constant composition is also called the law of multiple proportions.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The law of constant composition (Proust's law) states that a compound always contains the same elements in the same fixed ratio by mass. The law of multiple proportions (Dalton's law) is a different law dealing with ratios of elements in different compounds. They are not the same.

Multiple choice general knowledge science & technology

When a gas flows through a small hole of its container, this is called ...

  1. Diffusion

  2. Effusion

  3. Osmosis

  4. Extrusion
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Effusion is the process where a gas flows through a small hole or opening in its container under pressure. Diffusion is spreading through a medium, osmosis is solvent movement through membranes, and extrusion is a manufacturing process. Option B is correct.

Multiple choice general knowledge science & technology

At critical pressure ...

  1. An ideal gas becomes a solid

  2. A liquid becomes a solid

  3. A gas becomes a liquid

  4. A liquid gets vapourized
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

At the critical pressure, a gas can condense into a liquid. The critical point represents the highest temperature and pressure at which a gas can be liquefied. Above this point, the gas and liquid phases become indistinguishable (supercritical fluid).

Multiple choice general knowledge science & technology

Aerobic processes need ...

  1. Hydrogen

  2. Oxygen

  3. Helium

  4. Nitrogen
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Aerobic processes, by definition, require oxygen. 'Aerobic' means 'requiring air or oxygen'. Examples include aerobic respiration in cells and aerobic decomposition. Anaerobic processes occur without oxygen.

Multiple choice general knowledge science & technology

Pick the correct statement:

  1. Le Chatelier's principle deals with equilibrium.

  2. Le Chatelier's principle deals with an ideal gas.

  3. Le Chatelier's principle deals with dispersion forces.

  4. Le Chatelier's principle deals with attractive forces.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Le Chatelier's principle states that when a system at equilibrium is disturbed, it shifts to counteract the disturbance and establish a new equilibrium. It applies to chemical equilibria, not specifically to gases, dispersion forces, or attractive forces (though it can affect systems involving these).