Question: Both temporary and permanent hardness of water can be removed by
[A].boiling
distillation
filtration
decantation
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
QuizMaster
Permanent hardness of water is caused by the presence of
Question: Permanent hardness of water is caused by the presence of
[A].bicarbonates of calcium and magnesium
carbonates of sodium and potassium
chlorides and sulfates of calcium and magnesium
phosphates of sodium and potassium
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
When temporary hard water is boiled, one of the substances formed is
Question: When temporary hard water is boiled, one of the substances formed is
[A].calcium bicarbonate
calcium sulfate
hydrogen chloride
carbon dioxide
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
Temporary hardness of water may be removed by adding
Question: Temporary hardness of water may be removed by adding
[A].calcium hydroxide
calcium carbonate
calcium chloride
sodium bicarbonate
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Temporary hardness of water is caused by the presence of
Question: Temporary hardness of water is caused by the presence of
[A].chlorides of calcium and magnesium
sulfates of calcium and magnesium
bicarbonates of calcium and magnesium
carbonates of sodium and potassium
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
The purest form of naturally occurring water is
Question: The purest form of naturally occurring water is
[A].rain water
river water
pond water
well water
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
The ultimate source of water is
Question: The ultimate source of water is
[A].rivers and lakes
dew and forest
rain and snow
underground and surface
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
If the packing density (α) is defined as the volume of the fiber unit volume of filter bed, the velocity within the filter void space is equal to (where V is velocity in fluid void space and V0 is undisturbed fluid velocity)
Question: If the packing density (α) is defined as the volume of the fiber unit volume of filter bed, the velocity within the filter void space is equal to (where V is velocity in fluid void space and V0 is undisturbed fluid velocity)
[A].V = V0/(1-α)
V-V0 = 1 – α
V = V0(1 – α)
V = V0/(1 + α)
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
The heat conduction in dry air is
Question: The heat conduction in dry air is
[A].less rapid than in steam
more rapid than in steam
similar to steam
none of these
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
The moist heat is more effective than the dry heat because the intrinsic heat resistance of vegetative cells is greatly
Question: The moist heat is more effective than the dry heat because the intrinsic heat resistance of vegetative cells is greatly
[A].increased in a dry state
decreased in a dry state
increased in a wet state
decreased in a wet state
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.