Soda water was invented by

Soda water contains ----.

A

carbon dioxcide

B

carbonic acid

C

nitrous acid

D

sulphuric acid

Soda water contains

A

carbon dioxide

B

carbonic

C

nitrous acid

D

sulphuric

The major disadvantage of lime soda process of water softening is that

A

It is unsuitable for turbid and acidic water

B

Huge amount of precipitate is formed which creates a disposal problem

C

The effluent cannot be reduced to zero hardness

D

It is unsuitable for softening the water of excessive hardness

Lime and soda ash are added to water to remove

A

Bicarbonates & sulphates of calcium and magnesium

B

Undersirable taste and odour

C

Bacteria

D

Its corrosiveness

__________ is removed from water by lime-soda process.

A

Foul smell and taste

B

Iron and manganese

C

Temporary hardness

D

Permanent hardness

A sink contains exactly 12 liters of water. If water is drained from the sink until it holds exactly 6 liters of water less than the quantity of water drained away, how many liters of water were drained away ?

A

2

B

3

C

9

D

6

There are 10 orange sodas, 15 cream sodas and 7 cherry sodas in an ice chest. How many sodas must be removed from the ice chest to guarantee that one of each type of soda has been chosen?

A

16

B

18

C

23

D

26

There are 10 orange sodas, 15 cream sodas, and 7 cherry sodas in an ice chest, How many sodas must be removed from the ice chest to guarantee that one of each type of soda has been chosen?

A

16

B

18

C

23

D

26

সোডা ক্ষার (washing soda) এ শতকরা পানির পরিমাণ 62.94% হলে, যৌগটিতে পানির অনুর সংখ্যা নির্ণয় কর।

A

5

B

7

C

8

D

10

Ordinary table salt is sodium chloride. What is baking soda?

A

Potassium chloride

B

Potassium carbonate

C

Potassium hydroxide

D

Sodium bicarbonate

Soda water was invented by

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