Permanent hardness of water can be removed by

Question

Permanent hardness of water can be removed by

A. Simply boiling

B. Adding alum

C. Passing it through cation & anion exchangers

D. All (A), (B) and (C)

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Soap cannot be used with hard water, because

A. Hard water contains sulphate

B. They form insoluble calcium soaps which precipitate

C. They attract back the removed dirt

D. None of these

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In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed:

A. Furnace → converter → absorber

B. Furnace → evaporator → absorber

C. Furnace → converter → evaporator

D. Converter → furnace → absorber

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__________ process is used for the manufacture of sodium carbonate by ammonia soda process.

A. Ostwald's

B. Bosch

C. Solvay

D. Haber's

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Magnesium and calcium __________ cause temporary hardness of water.

A. Carbonates

B. Bicarbonates

C. Phosphates

D. Sulphates

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Concentration of sulphide ores is done usually by

A. Roasting

B. Smelting

C. Froth floatation

D. Electromagnetic separation

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Starting material for the production of styrene butadiene rubber (SBR) is

A. Ethyl alcohol

B. Ethylene

C. Both (A) & (B)

D. Neither (A) nor (B)

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Triple superphosphate is manufactured by reacting

A. Phosphate rock with phosphoric acid

B. Phosphate rock with sulphuric acid

C. Phosphate rock with nitric acid

D. Ammonium phosphate with phosphoric acid

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All enzymes are made of

A. Fats

B. Carbohydrates

C. Proteins

D. Amino acids

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Which of the following is an endothermic reaction?

A. Absorption of SO₃ in 98% H₂SO₄

B. C + H₂O = CO + H₂

C. Thermal dissociation of iron pyrites

D. Both (B) and (C)

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In the manufacture of H₂SO₄, vanadium catalyst as compared to platinum catalyst

A. Gives higher conversion efficiency

B. Has a longer life and is not poisoned by arsenic

C. Handles lower SO2 content gas (7 -10% SO₂), thus increasing the capital cost of the plant

D. All (A), (B) and (C)

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Hydrazine is largely used

A. As a starting material for 'hypo'

B. In photographic industry

C. As rocket fuel

D. In printing industry

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Catalytic oxidation of toluene produces

A. Styrene

B. Phenol

C. Benzene

D. Tri-nitro-toluene

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Which of the following is not an insecticide?

A. Hydrocyanic acid

B. Nicotine

C. Sodium fluoride

D. Hexane

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CO & H₂ are the constituents of

A. Producer gas

B. Water gas

C. Coke oven gas

D. All (A), (B) and (C)

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Boiling of water containing temporary hardness produces

A. CO₂

B. CaSO₄

C. CaHCO₃

D. None of these

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Nitrogen is an essential component of

A. Mineral salts

B. Carbohydrates

C. Fats

D. Proteins

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Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

A. Poor oxidation stability and high gum forming tendency

B. Greater tendency of decomposition at elevated temperature

C. Hydrolysis tendency in presence of water

D. All (A), (B) and (C)

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Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.

A. SO₃

B. Cl₂

C. NH₃

D. SO₂

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Dichloro diphenyl __________ is the full form of DDT (an insecticide).

A. Tetrachloroethane

B. Trichloroethane

C. Tetrachloromethane

D. Trichloromethane

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Diaphragm electrolytic cell as compared to mercury electrolytic cell

A. Produces 70% NaOH solution

B. Requires less specific power consumption for the production of chlorine

C. Requires lesser investment for similar capacity

D. All (A), (B) and (C)

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Bakelite is chemically known as

A. Polyvinyl chloride (PVC)

B. Polybutadiene

C. Phenol formaldehyde

D. Polyurethane

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Calgon used in water treatment is chemically

A. Sodium phosphate

B. Sodium hexametaphosphate

C. Calcium phosphate

D. Tricresyl phosphate

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Most widely and commonly used coagulant for the removal of suspended impurities in water is

A. Bleaching powder

B. Slaked lime

C. Alum

D. Copper sulphate

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Enamels

A. Give good glossy finish

B. Are same as varnish

C. Are prepared from non-drying oil

D. Do not contain pigment

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Refractory bricks having high thermal conductivity is desirable, when it is to be used in the

A. L.D. converter

B. Blast furnace

C. Rotary kiln

D. Recuperator

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The type of high refractive index glass used in optical instruments is __________ glass.

A. Pyrex

B. Flint

C. Crookes

D. None of these

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Which of the following coals has the highest calorific value?

A. Lignite

B. Sub-bituminous

C. Anthracite

D. Peat

Discuss this answer

Solvay process is used for the manufacture of

A. Caustic soda

B. Soda ash

C. Caustic potash

D. Soda lime

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__________ is an ore concentrating metallurgical process involving a chemical change.

A. Electromagnetic separation

B. Froth floatation

C. Roasting

D. None of these

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Zeolite is a/an

A. Naturally occuring clay which is capable of exchanging cations

B. Abrasive material

C. Catalyst used in shift conversion

D. None of these

Discuss this answer

Accepted Answer

C. Passing it through cation & anion exchangers

Permanent hardness of water can be removed by

Correct Answer :

Show all Chemical Process MCQ

Related Questions

Soap cannot be used with hard water, because

In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed:

__________ process is used for the manufacture of sodium carbonate by ammonia soda process.

Magnesium and calcium __________ cause temporary hardness of water.

Concentration of sulphide ores is done usually by

Starting material for the production of styrene butadiene rubber (SBR) is

Triple superphosphate is manufactured by reacting

All enzymes are made of

Which of the following is an endothermic reaction?

In the manufacture of H₂SO₄, vanadium catalyst as compared to platinum catalyst

Hydrazine is largely used

Catalytic oxidation of toluene produces

Which of the following is not an insecticide?

CO & H₂ are the constituents of

Boiling of water containing temporary hardness produces

Nitrogen is an essential component of

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.

Dichloro diphenyl __________ is the full form of DDT (an insecticide).

Diaphragm electrolytic cell as compared to mercury electrolytic cell

Bakelite is chemically known as

Calgon used in water treatment is chemically

Most widely and commonly used coagulant for the removal of suspended impurities in water is

Enamels

Refractory bricks having high thermal conductivity is desirable, when it is to be used in the

The type of high refractive index glass used in optical instruments is __________ glass.

Which of the following coals has the highest calorific value?

Solvay process is used for the manufacture of

__________ is an ore concentrating metallurgical process involving a chemical change.

Zeolite is a/an

Also checkout

Permanent hardness of water can be removed by

Correct Answer :

Show all Chemical Process MCQ

Related Questions

Soap cannot be used with hard water, because

In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed:

__________ process is used for the manufacture of sodium carbonate by ammonia soda process.

Magnesium and calcium __________ cause temporary hardness of water.

Concentration of sulphide ores is done usually by

Starting material for the production of styrene butadiene rubber (SBR) is

Triple superphosphate is manufactured by reacting

All enzymes are made of

Which of the following is an endothermic reaction?

In the manufacture of H2SO4, vanadium catalyst as compared to platinum catalyst

Hydrazine is largely used

Catalytic oxidation of toluene produces

Which of the following is not an insecticide?

CO & H2 are the constituents of

Boiling of water containing temporary hardness produces

Nitrogen is an essential component of

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water.

Dichloro diphenyl __________ is the full form of DDT (an insecticide).

Diaphragm electrolytic cell as compared to mercury electrolytic cell

Bakelite is chemically known as

Calgon used in water treatment is chemically

Most widely and commonly used coagulant for the removal of suspended impurities in water is

Enamels

Refractory bricks having high thermal conductivity is desirable, when it is to be used in the

The type of high refractive index glass used in optical instruments is __________ glass.

Which of the following coals has the highest calorific value?

Solvay process is used for the manufacture of

__________ is an ore concentrating metallurgical process involving a chemical change.

Zeolite is a/an

Also checkout

In the manufacture of H₂SO₄, vanadium catalyst as compared to platinum catalyst

CO & H₂ are the constituents of