Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of (1) Nitrates (2) Zeolites (3) Sulphonates (4) None of these

Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of (1) Nitrates (2) Zeolites (3) Sulphonates (4) None of these
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(2) Zeolites Explanation: Zeolites are crystalline solids structures made of silicon, aluminum and oxygen that form a framework with cavities and channels inside where cations, water and/or small molecules may reside.
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Hardness of water can be removed by boiling if it is due to (A) Calcium bicarbonates (B) Calcium sulphates (C) Calcium chloride (D) Calcium nitrates

Description : Hardness of water can be removed by boiling if it is due to  (A) Calcium bicarbonates  (B) Calcium sulphates  (C) Calcium chloride  (D) Calcium nitrates 

Last Answer : (A) Calcium bicarbonates 

Permanent hardness of water is due to the presence of calcium & magnesium (A) Bi-carbonates (B) Sulphates & chlorides (C) Carbonate (D) None of these

Description : Permanent hardness of water is due to the presence of calcium & magnesium (A) Bi-carbonates (B) Sulphates & chlorides (C) Carbonate (D) None of these

Last Answer : (B) Sulphates & chlorides

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Description : Detergents used for cleaning clothes and utensils contain (1) nitrates (2) bicarbonates (3) sulphonates (4) bismuthates

Last Answer : sulphonates

Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of (A) Calcium sulphate (B) Sodium chloride(C) Sodium sulphate(D) Magnesium chloride

Description : Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of (A) Calcium sulphate (B) Sodium chloride (C) Sodium sulphate (D) Magnesium chloride

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Permanent hardness of water can be removed by (A) Addition of soda ash to it (B) Treating it with zeolites (C) Passing it through sodium hexametaphosphate (D) All (A), (B), and (C)

Description : Permanent hardness of water can be removed by (A) Addition of soda ash to it (B) Treating it with zeolites (C) Passing it through sodium hexametaphosphate (D) All (A), (B), and (C)

Last Answer : (D) All (A), (B), and (C)

Oxidation process results in the formation of A. Carbon dioxide B. Nitrates C. Sulphates D. All the above

Description : Oxidation process results in the formation of A. Carbon dioxide B. Nitrates C. Sulphates D. All the above

Last Answer : ANS: D

Injurious effects of sulphates can be replaced with the addition of ________: a. Nitrates b. Phosphates c. Ammonia d. Ca & Mg

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Last Answer : Nitrates

Which of the following is a primary pollutant in atmospheric air? A. Cl2 B. SO3 C. Nitrates D. Sulphates

Description : Which of the following is a primary pollutant in atmospheric air? A. Cl2 B. SO3 C. Nitrates D. Sulphates

Last Answer : A. Cl2

Consider the following statements: 1. Carbonate hardness is due to bicarbonates. 2. Non-carbonate hardness is due to sulphates and chlorides of Ca and Mg. 3. Both the hardnesses can be removed by lime-soda method. 4. Both the hardnesses can be removed by ion-exchange method. Which of these statements are correct? (a) 1, 2 & 3 only (b) 1, 2 & 4 only (c) 2, 3 & 4 only (d) 1, 2, 3 & 4

Description : Consider the following statements: 1. Carbonate hardness is due to bicarbonates. 2. Non-carbonate hardness is due to sulphates and chlorides of Ca and Mg. 3. Both the hardnesses can be removed by lime-soda method. 4. Both the hardnesses can be ... (b) 1, 2 & 4 only (c) 2, 3 & 4 only (d) 1, 2, 3 & 4

Last Answer : (a) 1, 2 & 3 only

Hardness of water is caused due to (A) Calcium sulphate (B) Magnesium sulphate (C) Calcium nitrates (D) All the above

Description : Hardness of water is caused due to (A) Calcium sulphate (B) Magnesium sulphate (C) Calcium nitrates (D) All the above

Last Answer : (D) All the above

Magnesium and calcium __________ cause temporary hardness of water. (A) Carbonates (B) Bicarbonates (C) Phosphates (D) Sulphates

Description : Magnesium and calcium __________ cause temporary hardness of water. (A) Carbonates (B) Bicarbonates (C) Phosphates (D) Sulphates

Last Answer : (B) Bicarbonates

Hardness of water is caused by (A) Presence of soap lather (B) Presence of chlorides and sulphates of sodium and potassium (C) Presence of bicarbonates, sulphates or chlorides of calcium and magnesium (D) Turbidity

Description : Hardness of water is caused by  (A) Presence of soap lather  (B) Presence of chlorides and sulphates of sodium and potassium  (C) Presence of bicarbonates, sulphates or chlorides of calcium and magnesium  (D) Turbidity 

Last Answer : (C) Presence of bicarbonates, sulphates or chlorides of calcium and magnesium 

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Permanent hardness of water is due to the presence of which salts

Description : Permanent hardness of water is due to the presence of which salts

Last Answer : Chlorides and sulphates of Calcium & Magne- sium

Permanent hardness of water is due to the presence of?

Description : Permanent hardness of water is due to the presence of?

Last Answer : sulphates and chlorides of calcium and magne- sium

Permanent hardness of water is due to the presence of?

Description : Permanent hardness of water is due to the presence of?

Last Answer : bicarbonates of calcium and magnesium

Which property of Zeolites make it suitable to soften hard water?

Description : Which property of Zeolites make it suitable to soften hard water?

Last Answer : Ans-Sodium ions are exchanged by calcium and magnesium ions

Permanent - hardness of water may be removed by addition of – (1) Alum (2) Sodium carbonate (3) Lime (4) Potassium Permangante

Description : Permanent - hardness of water may be removed by addition of – (1) Alum (2) Sodium carbonate (3) Lime (4) Potassium Permangante

Last Answer : (2) Sodium carbonate Explanation: Sodium carbonate (also known as washing soda or soda ash) is a sodium salt of carbonic acid. In domestic use, it is used as a water softener in laundering. It ... with the detergent being used. Sodium carbonate can be used to remove grease, oil and wine stains.

Which compounds are responsible for permanent and temporary hardness of water?

Description : Which compounds are responsible for permanent and temporary hardness of water?

Last Answer : Ans-Permanent hardness is due to chlorides and sulphates of calcium and magnesium While temporary hardness is due to bicarbonates of calcium and magessium.

Which compounds are responsible for permanent hardness of water?

Description : Which compounds are responsible for permanent hardness of water?

Last Answer : Ans- Chlorides and sulphates of calcium and magnesium

Permanent – hardness of water may be removed by addition of (1) Alum (2) Sodium carbonate (3) Lime (4) Potassium Permangante

Description : Permanent – hardness of water may be removed by addition of (1) Alum (2) Sodium carbonate (3) Lime (4) Potassium Permangante

Last Answer : Sodium carbonate

What happens when nitrates of alkaline earth metal is heated?

Description : What happens when nitrates of alkaline earth metal is heated?

Last Answer : Ans The nitrates are made by dissolution of the carbonates in dilute nitric acid. Magnesium nitrate crystallises with six molecules of water, whereas barium nitrate crystallises as the anhydrous salt. ... hydration enthalpy. All of them decompose on heating to give the oxide like lithium nitrate.

What happens when nitrates of alkalin earth metal is heated?

Description : What happens when nitrates of alkalin earth metal is heated? 

Last Answer : The nitrates are made by dissolution of the carbonates in dilute nitric acid. Magnesium nitrate crystallises with six molecules of water, whereas barium nitrate crystallises as the anhydrous salt. This again shows ... . All of them decompose on heating to give the oxide like lithium nitrate.  

What are the Uses of Zeolites?

Description : What are the Uses of Zeolites?

Last Answer : Ans. They are used as shape selective catalysts To remove the hardness of water

What are zeolites?

Description : What are zeolites?

Last Answer : Ans. They are the alumino silicates and used as shape selective catalysts. Eg.ZSM-5

In water treatment plant, use of chloramines ensures (1) taste and odour control (2) weed control in reservoirs (3) disinfection (4) removal of permanent hardness

Description : In water treatment plant, use of chloramines ensures (1) taste and odour control (2) weed control in reservoirs (3) disinfection (4) removal of permanent hardness

Last Answer : (3) disinfection Explanation: The particular type of chloramine used in drinking water disinfection is called monochloramine. Chloramine is chiefly a secondary disinfectant that are added to water that has already been disinfected with a primary disinfectant, often chlorine

In water treatment plant, use of chloramines ensures _____ (1) taste and odour control (2) weed control in reservoirs (3) disinfection (4) removal of permanent hardness

Description : In water treatment plant, use of chloramines ensures _____ (1) taste and odour control (2) weed control in reservoirs (3) disinfection (4) removal of permanent hardness

Last Answer : disinfection

Write the chemical name and chemical formula of the salt used to remove permanent hardness of water. -Science

Description : Write the chemical name and chemical formula of the salt used to remove permanent hardness of water. -Science

Last Answer : Sodium carbonate, Na2CO3, is also known as washing soda. It can remove temporary and permanent hardness from water.

How can Permanent hardness of water be removed? -Do You Know?

Description : How can Permanent hardness of water be removed? -Do You Know?

Last Answer : A few methods to remove hardness from water are,Chemical Process of Boiling Hard Water.Adding Slaked Lime (Clark's Process)Adding Washing Soda.Calgon Process.Ion Exchange Process.Using Ion Exchange Resins.

Permanent hardness of water cannot be removed by (a) Boiling (b) Adding caustic soda (c) Distillation (d) Adding soda

Description : Permanent hardness of water cannot be removed by (a) Boiling (b) Adding caustic soda (c) Distillation (d) Adding soda

Last Answer : Ans:(a)

Which of the following is responsible for permanent hardness of water? (1) magnesium bicarbonate (2) sodium chloride (3) calcium sulphate (4) calcium bicarbonate

Description : Which of the following is responsible for permanent hardness of water? (1) magnesium bicarbonate (2) sodium chloride (3) calcium sulphate (4) calcium bicarbonate

Last Answer : (3) calcium sulphate Explanation: Permanent hardness is caused by dissolved calcium sulfate (which is not removed by boiling). Hard water contains dissolved magnesium and calcium ions. These make ... . Temporary hardness is caused by dissolved calcium hydrogen carbonate (which is removed by boiling)

The method that cannot be used for re- moving permanent hardness of water is?

Description : The method that cannot be used for re- moving permanent hardness of water is?

Last Answer : boiling

How can Permanent hardness of water be removed?

Description : How can Permanent hardness of water be removed?

Last Answer : By adding washing soda

Permanent hardness of water can be re- moved by adding?

Description : Permanent hardness of water can be re- moved by adding?

Last Answer : sodium carbonate or by distillation or by ex- change method

__________ is removed from water by lime-soda process. (A) Foul smell and taste (B) Iron and manganese (C) Temporary hardness (D) Permanent hardness

Description : __________ is removed from water by lime-soda process. (A) Foul smell and taste (B) Iron and manganese (C) Temporary hardness (D) Permanent hardness

Last Answer : (C) Temporary hardness

Which of the following is not responsible for causing permanent hardness of water? (A) Ca(HCO3 )2 (B) CaCl2 (C) MgCl2(D) None of these

Description : Which of the following is not responsible for causing permanent hardness of water? (A) Ca(HCO3 )2 (B) CaCl2 (C) Mgcl2 (D) None of these

Last Answer : (A) Ca(HCO3 )2

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)

Description : 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)

Last Answer : (C) Passing it through cation & anion exchangers

Which of the following processes can remove both temporary as well as permanent hardness of water? (A) Filtration (B) Boiling (C) Distillation (D) None of these

Description : Which of the following processes can remove both temporary as well as permanent hardness of water? (A) Filtration (B) Boiling (C) Distillation (D) None of these

Last Answer : (C) Distillation

Permanent hardness of water can be removed by (A) Boiling (B) Adding Ca(OH)2 (C) Boiling it with Na2CO3 (D) None of these

Description : Permanent hardness of water can be removed by (A) Boiling (B) Adding Ca(OH)2 (C) Boiling it with Na2CO3 (D) None of these

Last Answer : (C) Boiling it with Na2CO3

Carbonates in water produce (A) Temporary hardness (B) Permanent hardness (C) Acidity (D) Alkanity

Description : Carbonates in water produce (A) Temporary hardness (B) Permanent hardness (C) Acidity (D) Alkanity

Last Answer : (A) Temporary hardness

Permanent hardness of water can be removed by (A) Adding alum (B) Adding lime (C) Adding chlorine (D) Zeolite process

Description : Permanent hardness of water can be removed by  (A) Adding alum  (B) Adding lime  (C) Adding chlorine  (D) Zeolite process

Last Answer : (D) Zeolite process

How can Permanent hardness of water be removed?

Description : How can Permanent hardness of water be removed?

Last Answer : By adding washing soda

Permanent hardness of water may be removed by addition of?

Description : Permanent hardness of water may be removed by addition of?

Last Answer : Sodium carbonate

1. How can Permanent hardness of water be removed? 2. The Sun City is located in which continent? 3. Which situation makes a firm most efficient? 4. On the shore of which counrty cold currents have cooling effect? 5. Which pioneer was in preaching Nirguna Bhakti in medieval India?

Description : 1. How can Permanent hardness of water be removed? 2. The Sun City is located in which continent? 3. Which situation makes a firm most efficient? 4. On the shore of which counrty cold currents ... Aravalli ranges are an example of which mountains? 20. Which war was ended by the Treaty of Madras?

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Which of the following is responsible for permanent hardness of water ? (1) magnesium bicarbonate (2) sodium chloride (3) calcium sulphate (4) calcium bicarbonate

Description : Which of the following is responsible for permanent hardness of water ? (1) magnesium bicarbonate (2) sodium chloride (3) calcium sulphate (4) calcium bicarbonate

Last Answer : calcium sulphate 

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Description : The Order Book of a Record Office: (A) Is a permanent record and should not be destroyed at all (B) May be destroyed as usual after expiry of the preservation period (C) May not be ... the Superintendent (D) May not be destroyed without the special permission of Head of the Circle / Region

Last Answer : (D) May not be destroyed without the special permission of Head of the Circle / Region

From the following records , which record is permanent One ? a. Service Book b. Stock Book c. Register of particulars of accounts records destroyed

Description : From the following records , which record is permanent One ? a. Service Book b. Stock Book c. Register of particulars of accounts records destroyed

Last Answer : c. Register of particulars of accounts records destroyed

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Description : Which of the following types of cells have a latent ability to regenerate? a) Stable Stable cells have a latent ability to regenerate if they are damaged or destroyed and are found in the ... a type of labile cell that multiply constantly to replace cells worn out by normal physiologic processes.

Last Answer : a) Stable Stable cells have a latent ability to regenerate if they are damaged or destroyed and are found in the kidney, liver, and pancreas, among other body organs.

The increase in hardness of metal due to its cold working is termed as the __________ hardening. (A) Work (B) Age (C) Induction (D) Flame

Description : The increase in hardness of metal due to its cold working is termed as the __________ hardening. (A) Work (B) Age (C) Induction (D) Flame

Last Answer : (A) Work

Which of the following statements about the zeolites is false?

Description : Which of the following statements about the zeolites is false?

Last Answer : Which of the following statements about the zeolites is false? A. Some of the ` ... D. Zeolites are aluminosilicates having three dimensional network