The metallic Constituents of hard water are – (1) Magnesium, calcium and tin (2) Iron, tin and calcium (3) Calcium, magnesium and iron (4) Magnesium, tin and iron

The metallic Constituents of hard water are – (1) Magnesium, calcium and tin (2) Iron, tin and calcium (3) Calcium, magnesium and iron (4) Magnesium, tin and iron
by

1 Answer

Answer :

(3) Calcium, magnesium and iron Explanation: Hard water is water that has high mineral content. In domestic settings, hard water is often indicated by a lack of suds formation when soap is agitated in water. Wherever water hardness is a concern, water softening is commonly used to reduce hard water's adverse effects.
by
selected

Related questions

The metallic constituents of hard water are - (1) Magnesium, Calcium and tin (2) Iron, tin and calcium (3) Calcium, magnesium and iron (4) Magnesium, tin and iron

Description : The metallic constituents of hard water are - (1) Magnesium, Calcium and tin (2) Iron, tin and calcium (3) Calcium, magnesium and iron (4) Magnesium, tin and iron

Last Answer : (3) Calcium, magnesium and iron Explanation: Hard water is water that has high mineral content (in contrast with "soft water"). Hard water is formed whenwater percolates through deposits of limestone and chalk which are largely made up of calcium and magnesium carbonates.

The metallic constituents of hard water are : (1) Magnesium, calcium and tin (2) Iron, tin and calcium (3) Calcium, magnesium and iron (4) Magnesium, tin and iron

Description : The metallic constituents of hard water are : (1) Magnesium, calcium and tin (2) Iron, tin and calcium (3) Calcium, magnesium and iron (4) Magnesium, tin and iron

Last Answer : Calcium, magnesium and iron

Chlorophyll is porphyrin containing - (1) magnesium (2) iron (3) calcium (4) (4) tin

Description : Chlorophyll is porphyrin containing - (1) magnesium (2) iron (3) calcium (4) (4) tin

Last Answer : (1) magnesium Explanation: Chlorophyll are greenish pigment which contain a porphyrin ring. This is a stable ring-shaped molecule around which electrons are free to migrate. Magnesium is central atom in porphyrin structure of chlorophyll.

What are the metallic constituents of hard water? -Do You Know?

Description : What are the metallic constituents of hard water? -Do You Know?

Last Answer : answer:

What are the metallic constituents of hard water?

Description : What are the metallic constituents of hard water?

Last Answer : Calcium, magnesium and iron

Which one of the following metals is essential to the structure and functioning of hemoglobin? w) copper x) magnesium y) tin z) iron

Description : Which one of the following metals is essential to the structure and functioning of hemoglobin? w) copper x) magnesium y) tin z) iron

Last Answer : ANSWER: Z -- IRON

Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth? (A) Lime stone and alumina (B) Silica and alkalies (C) Alumina and iron (D) Alkalies and magnesium

Description : Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth? (A) Lime stone and alumina (B) Silica and alkalies (C) Alumina and iron (D) Alkalies and magnesium

Last Answer : Answer: Option B

Generally metallic oxides are basic and non-metallic are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red? a)sulphur dioxide b)Magnesium oxide c)iron oxide d)copper oxide

Description : Generally metallic oxides are basic and non-metallic are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red? a)sulphur dioxide b)Magnesium oxide c)iron oxide d)copper oxide

Last Answer : a)sulphur dioxide

(3) Detergents give lather even with hard water Explanation: Soaps are made of materials found in nature. Detergents are synthetic a big drawback of washing with soap is that the minerals in water react with those in soap, leaving an insoluble film. Detergents react less to minerals in water and for all practical purposes are the product of choice for laundry, unless you have very soft water. On the other hand, soap will combine with the magnesium and calcium ions in hard water to create an insoluble residue that can clog drains and stick to clothing.

Description : (3) Detergents give lather even with hard water Explanation: Soaps are made of materials found in nature. Detergents are synthetic a big drawback of washing with soap is that the minerals in water ... ions in hard water to create an insoluble residue that can clog drains and stick to clothing.

Last Answer : What is the objective of the 'Kyoto Protocol'? (1) To abolish child labour (2) To eliminate nuclear weapons (3) To increase ground water levels (4) To reduce greenhouse gases

(3) Detergents give lather even with hard water Explanation: Soaps are made of materials found in nature. Detergents are synthetic. a big drawback of washing with soap is that the minerals in water react with those in soap, leaving an insoluble film. Detergents react less to minerals in water and for all practical purposes are the product of choice for laundry, unless you have very soft water. On the other hand, soap will combine with the magnesium and calcium ions in hard water to create an insoluble residue that can clog drains and stick to clothing.

Description : (3) Detergents give lather even with hard water Explanation: Soaps are made of materials found in nature. Detergents are synthetic. a big drawback of washing with soap is that the minerals in water ... ions in hard water to create an insoluble residue that can clog drains and stick to clothing.

Last Answer : Cement is usually a mixture of – (1) Calcium silicate and calcium alurninate (2) Calcium silicate and calcium ferrate (3) Calcium aluminate and calcium ferrate (4) Lime stone and silicon dioxide

The process of removing calcium and magnesium from hard water is known as – (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening

Description : The process of removing calcium and magnesium from hard water is known as – (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening

Last Answer : (4) Water softening Explanation: Water softening is the reduction of the concentration of calcium, magnesium, and certain other metal cations in hard water. Hardness ions dissolved in water can cause a ... use depend on an ion-exchange resin in which hardness ions are exchanged for sodium ions.

The process of removing calcium and magnesium from hard water is known as (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening

Description : The process of removing calcium and magnesium from hard water is known as (1) Sedimentation (2) Filtration (3) Flocculation (4) Water softening

Last Answer :  Water softening

Write balanced chemical equations for the following word equations: (a) Iron + Chlorine → Iron (III) chloride (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water (c) Magnesium + oxygen → Magnesium oxide (d) Calcium oxide + water → Calcium hydroxide (e) Sodium + chlorine → Sodium chloride

Description : Write balanced chemical equations for the following word equations: (a) Iron + Chlorine → Iron (III) chloride (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water (c) Magnesium + oxygen → ... oxide (d) Calcium oxide + water → Calcium hydroxide (e) Sodium + chlorine → Sodium chloride

Last Answer : (a) Iron + Chlorine → Iron (III) chloride 4Fe + 3Cl2 → 2F2Cl3 (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water 2Mg + 2H2SO4 → 2MgSO4 + 2H2 (c) Magnesium + oxygen → Magnesium oxide 2Mg ... hydroxide CaO + H2O → Ca(OH)2 (e) Sodium + chlorine → Sodium chloride 2Na + Cl2 → 2NaCl

Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Description : Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Last Answer : (1) Calcium and Magnesium Explanation: Pure and simple, asbestos is a group of naturally occurring minerals. It is composed of calcium and magnesium silicate. Asbestos occurs as veins in rocks and is mined from the ground, similar to coal.

Write the molecular formulae of: 1. Copper oxide 2. Iron (III) chloride 3. Sodium hydroxide 4. Iron (II) sulphide 5. Lead (II) oxide 6. Hydrogen nitrate (nitric acid) 7. Hydrogen sulphate (sulphuric acid) 8. Calcium hydroxide 9. Magnesium carbonate 10.Ammonium carbonate

Description : Write the molecular formulae of: 1. Copper oxide 2. Iron (III) chloride 3. Sodium hydroxide 4. Iron (II) sulphide 5. Lead (II) oxide 6. Hydrogen nitrate (nitric ... Hydrogen sulphate (sulphuric acid) 8. Calcium hydroxide 9. Magnesium carbonate 10.Ammonium carbonate

Last Answer : 1. Copper oxide - CuO 2. Iron (III) chloride - FeCl3 3. Sodium hydroxide - NaOH 4. Iron (II) sulphide - FeS 5. Lead (II) oxide - PbO 6. Hydrogen nitrate (nitric acid) - HNO3 7. ... ) - H2SO4 8. Calcium hydroxide - Ca(OH)2 9. Magnesium carbonate - MgCO3 10.Ammonium carbonate - (NH4)2CO3

Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Description : Asbestos is formed of : (1) Calcium and Magnesium (2) Copper, Zinc and Manganese (3) Lead and Iron (4) Calcium and Zinc

Last Answer : Calcium and Magnesium

Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used (A) As a lubrican(B) As a rust preventive(C) In hard water for cleaning of cloth(D) As a foam depressant in distillation column

Description : Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used (A) As a lubrican (B) As a rust preventive (C) In hard water for cleaning of cloth (D) As a foam depressant in distillation column

Last Answer : (A) As a lubricant

Non-metallic character increases from (1) Magnesium to Barium (2) Potassium to Cesium (3) Oxygen to Selenium (4) Sodium to Chlorine

Description : Non-metallic character increases from (1) Magnesium to Barium (2) Potassium to Cesium (3) Oxygen to Selenium (4) Sodium to Chlorine

Last Answer : (4) Sodium to Chlorine Explanation: The elements which lose electrons to form cations are known as metals. Metallic character decreases across a period as we move from left to right.

(1) Calcium silicate and calcium alurninate Explanation: Portland cement is the most common type of cement in general use around the world because it is a basic ingredient of concrete, mortar, stucco and most non-specialty grout. It usually originates from limestone. It is a fine powder produced by grinding Portland cement. clinker (more than 90%), a limited amount of calcium sulfate (which controls the set time) and up to 5% minor constituents.

Description : (1) Calcium silicate and calcium alurninate Explanation: Portland cement is the most common type of cement in general use around the world because it is a basic ingredient of concrete, mortar, stucco ... limited amount of calcium sulfate (which controls the set time) and up to 5% minor constituents.

Last Answer : Milk is a colloidal system in which: (1) Water is dispersed in fat (2) Fat is dispersed in water (3) Fat and water are dispersed in each other (4) Fat is dissolved

Magnalium is an alloy of (1) Aluminium and Magnesium (2) Magnesium and Tin (3) Aluminium and Zinc (4) Manganese and Magnesium

Description : Magnalium is an alloy of (1) Aluminium and Magnesium (2) Magnesium and Tin (3) Aluminium and Zinc (4) Manganese and Magnesium

Last Answer : Aluminium and Magnesium

Hard water contains (A) Calcium (B) Magnesium bicarbonates (C) Magnesium sulphate (D) All the above

Description : Hard water contains  (A) Calcium  (B) Magnesium bicarbonates  (C) Magnesium sulphate  (D) All the above 

Last Answer : (D) All the above 

"Hard" water is related to the presence of high concentrations of primarily four metal ions in water supplies. Calcium and magnesium ions are the most common of the four. Name one of the other two ions.

Description : "Hard" water is related to the presence of high concentrations of primarily four metal ions in water supplies. Calcium and magnesium ions are the most common of the four. Name one of the other two ions. 

Last Answer : ANSWER: IRON AND MANGANESE

A metallic alloy in which one of the constituent metal is __________, is called an amalgam. (A) Zinc (B) Mercury (C) Lead (D) Tin

Description : A metallic alloy in which one of the constituent metal is __________, is called an amalgam. (A) Zinc (B) Mercury (C) Lead (D) Tin

Last Answer : (B) Mercury

Choose a statement that correctly defines the term AMALGAM: A. Amalgam is a metallic powder composed of silver, tin, copper and zinc B. Amalgam is an alloy of two or more metals that have been dissolved in each other in the molten state. C. Amalgam is an alloy of two or more metals, one of them is mercury D. Amalgam is a metallic substance in powder or tablet from that is mixed with mercury E. Amalgam is an alloy of two or more metals, one of them is tin

Description : Choose a statement that correctly defines the term AMALGAM: A. Amalgam is a metallic powder composed of silver, tin, copper and zinc B. Amalgam is an alloy of two or more metals that have been dissolved in ... is mixed with mercury E. Amalgam is an alloy of two or more metals, one of them is tin

Last Answer : C. Amalgam is an alloy of two or more metals, one of them is mercury

Haemoglobin formation needs both (A) Iron and Zinc (B) Iron and Calcium (C) Iron and Copper (D) Iron and Magnesium

Description : Haemoglobin formation needs both (A) Iron and Zinc (B) Iron and Calcium (C) Iron and Copper (D) Iron and Magnesium

Last Answer : Answer : C

Milk is not considered a balanced diet now-a-days because of the absence of : (1) Magnesium and Vitamin D (2) Iron and Vitamin C (3) Calcium and Vitamin C (4) Iron and Vitamin A

Description : Milk is not considered a balanced diet now-a-days because of the absence of : (1) Magnesium and Vitamin D (2) Iron and Vitamin C (3) Calcium and Vitamin C (4) Iron and Vitamin A

Last Answer : (2) Iron and Vitamin C Explanation: A balanced diet means getting the right types and amounts of foods and drinks to supply nutrition and energy for maintaining body cells, tissues, and organs, and ... , and chlorine are all included as minerals and they typically occur at concentration of 5-40 mM.

Mineral constituent of chlorophyll is - (1) Iron (2) Magnesium (3) Calcium (4) Potassium

Description : Mineral constituent of chlorophyll is - (1) Iron (2) Magnesium (3) Calcium (4) Potassium

Last Answer : (2) Magnesium Explanation: Chlorophyll is the molecule that absorbs sunlight and uses its energy to synthesize carbohydrates from CO2 and water. This process is known as photosynthesis and is the basis for ... It is found in the chloroplasts of green plants, and is what makes green plants, green.

Pregnant women usually become deficient in - (1) Sodium and Calcium (2) Iron and Sodium (3) Calcium and Iron (4) Magnesium and Iron

Description : Pregnant women usually become deficient in - (1) Sodium and Calcium (2) Iron and Sodium (3) Calcium and Iron (4) Magnesium and Iron

Last Answer : (3) Calcium and Iron Explanation: When a woman becomes pregnant her body undergoes many physiological changes. Her hormone levels change not only to support the pregnancy but also to help ... only 15 percent to 20 percent, the risk of developing iron-deficiency anemia increases during pregnancy.

Minerals known to be required in large amounts for plant growth include (a) potassium, phosphorus, selenium, boron (b) magnesium, sulphur, iron, zinc (c) phosphorus, potassium, sulphur, calcium (d) calcium, magnesium, manganese, copper.

Description : Minerals known to be required in large amounts for plant growth include (a) potassium, phosphorus, selenium, boron (b) magnesium, sulphur, iron, zinc (c) phosphorus, potassium, sulphur, calcium (d) calcium, magnesium, manganese, copper.

Last Answer : (c) phosphorus, potassium, sulphur, calcium

Mineral found in red pigment of vertebrate blood is (a) magnesium (b) iron (c) calcium (d) copper.

Description : Mineral found in red pigment of vertebrate blood is (a) magnesium (b) iron (c) calcium (d) copper.

Last Answer : (b) iron

Plants grown in acidic soil are deficient in_____ a. Calcium and Manganese b. Magnesium and Calcium c. Iron and Manganese d. Aluminium and Iron

Description : Plants grown in acidic soil are deficient in_____ a. Calcium and Manganese b. Magnesium and Calcium c. Iron and Manganese d. Aluminium and Iron

Last Answer : b. Magnesium and Calcium

Plants grown in acidic soil are deficient in_____ a. Calcium and Manganese b. Magnesium and Calcium c. Iron and Manganese d. Aluminium and Iron

Description : Plants grown in acidic soil are deficient in_____ a. Calcium and Manganese b. Magnesium and Calcium c. Iron and Manganese d. Aluminium and Iron

Last Answer : b. Magnesium and Calcium

furnace slag is mainly molten (A) Sand (B) Magnesium silicate (C) Calcium silicate (D) Iron pyrite

Description : furnace slag is mainly molten (A) Sand (B) Magnesium silicate (C) Calcium silicate (D) Iron pyrite

Last Answer : Option C

Asbestos (A) Is a natural fibrous mineral substance (B) Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3) (C) Contains iron oxide and alumina (D) All the above

Description : Asbestos (A) Is a natural fibrous mineral substance (B) Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3) (C) Contains iron oxide and alumina (D) All the above

Last Answer : Answer: Option D

Mineral constituent of chlorophyll is (1) Iron (2) Magnesium (3) Calcium (4) Potassium

Description : Mineral constituent of chlorophyll is (1) Iron (2) Magnesium (3) Calcium (4) Potassium

Last Answer : Magnesium

Pregnant women usually become deficient in (1) Sodium and Calcium (2) Iron and Sodium (3) Calcium and Iron (4) Magnesium and Iron

Description : Pregnant women usually become deficient in (1) Sodium and Calcium (2) Iron and Sodium (3) Calcium and Iron (4) Magnesium and Iron

Last Answer : Calcium and Iron 

Milk is not considered a balanced diet now-a-days because of the absence of : (1) Magnesium and Vitamin D (2) Iron and Vitamin C (3) Calcium and Vitamin C (4) Iron and Vitamin A

Description : Milk is not considered a balanced diet now-a-days because of the absence of : (1) Magnesium and Vitamin D (2) Iron and Vitamin C (3) Calcium and Vitamin C (4) Iron and Vitamin A

Last Answer : Iron and Vitamin C

H2SO4 (< 50% concentration) is corrosive to (A) Aluminium, mild steel, stainless steel, concrete & tin (B) Copper, cast iron & high silicon iron (14% Si) (C) Rubber (butyl and hard), silicone rubber & Teflon (D) Glass, graphite, porcelain & stoneware

Description : H2SO4 (< 50% concentration) is corrosive to (A) Aluminium, mild steel, stainless steel, concrete & tin (B) Copper, cast iron & high silicon iron (14% Si) (C) Rubber (butyl and hard), silicone rubber & Teflon (D) Glass, graphite, porcelain & stoneware

Last Answer : (A) Aluminium, mild steel, stainless steel, concrete & tin

Which of the following elements would form a covalent bond with Bromine? w) Calcium x) Aluminum y) Oxygen z) Tin

Description : Which of the following elements would form a covalent bond with Bromine? w) Calcium x) Aluminum y) Oxygen z) Tin

Last Answer : ANSWER: Y -- OXYGEN

Which of the following is a non-metallic mineral? (a) Bauxite (b) Magnesium (c) Gypsum (d) Manganese

Description : Which of the following is a non-metallic mineral? (a) Bauxite (b) Magnesium (c) Gypsum (d) Manganese

Last Answer : Ans: (c)

Sodium chloride, potassium chloride, magnesium oxide are examples of molecules with (a) Covalent bonding (b) Ionic bonding (c) Metallic bonding (d) Hydrogen bonding

Description : Sodium chloride, potassium chloride, magnesium oxide are examples of molecules with (a) Covalent bonding (b) Ionic bonding (c) Metallic bonding (d) Hydrogen bonding

Last Answer : Ans:(b)

Which one of the following is a non-metallic mineral? A. Manganese B. Magnesium C. Gypsum (Answer) D. Bauxite E. None of these

Description : Which one of the following is a non-metallic mineral? A. Manganese B. Magnesium C. Gypsum (Answer) D. Bauxite E. None of these

Last Answer : C. Gypsum (Answer)

Main constituents of Portland cement are calcium aluminate and (A) Gypsum(B) Silicates(C) Sodium silicate(D) Carbonates

Description : Main constituents of Portland cement are calcium aluminate and (A) Gypsum (B) Silicates (C) Sodium silicate (D) Carbonates

Last Answer : (B) Silicates

Which of the following is the lightest of engineering metals? (A) Magnesium (B) Aluminium (C) Titanium (D) Tin

Description : Which of the following is the lightest of engineering metals? (A) Magnesium (B) Aluminium (C) Titanium (D) Tin

Last Answer : (A) Magnesium

Muntz metal is a/an alloys of (A) Magnesium & tin (B) Ferrous material (C) Lead & tin (D) Copper & zinc

Description : Muntz metal is a/an alloys of (A) Magnesium & tin (B) Ferrous material (C) Lead & tin (D) Copper & zinc

Last Answer : (D) Copper & zinc

(3) preventing rapid setting of cement Explanation: Portland cement clinker is a hydraulic material which shall consist of at least two-thirds by mass of calcium silicates, the remainder consisting of aluminium- and ironcontaining clinker phases and other compounds. The ratio of CaO to SiO2 shall not be less than 2.0. The magnesium oxide content (MgO) shall not exceed 5.0% by mass. Cement sets when mixed with water by way of a complex series of chemical reactions still only partly understood.

Description : (3) preventing rapid setting of cement Explanation: Portland cement clinker is a hydraulic material which shall consist of at least two-thirds by mass of calcium silicates, the remainder consisting of ... mixed with water by way of a complex series of chemical reactions still only partly understood.

Last Answer : Milk is a colloidal system in which: (1) Water is dispersed in fat (2) Fat is dispersed in water (3) Fat and water are dispersed in each other (4) Fat is dissolved

Hardness of the water is commonly measured in terms of - (1) Calcium carbonate equivalents (2) Calcium sulphate equivalents (3) Magnesium carbonate equivalents (4) Magnesium sulphate equivalents

Description : Hardness of the water is commonly measured in terms of - (1) Calcium carbonate equivalents (2) Calcium sulphate equivalents (3) Magnesium carbonate equivalents (4) Magnesium sulphate equivalents

Last Answer : (1) Calcium carbonate equivalents

The two metal ions that cause hardness to water are: (1) Calcium, Magnesium (2) Sodium, Calcium (3) Sodium, Potassium (4) Sodium, Magnesium

Description : The two metal ions that cause hardness to water are: (1) Calcium, Magnesium (2) Sodium, Calcium (3) Sodium, Potassium (4) Sodium, Magnesium

Last Answer : (1) Calcium, Magnesium Explanation: Calcium and magnesium ion cause hardness of water.

What is the most common salt in sea water? (1) Calcium carbonate (2) Potassium chloride (3) Sodium chloride (4) Magnesium sulphate

Description : What is the most common salt in sea water? (1) Calcium carbonate (2) Potassium chloride (3) Sodium chloride (4) Magnesium sulphate

Last Answer : (3) Sodium chloride Explanation: Sodium chloride, also known as salt, common salt, table salt or halite, is an ionic compound with the formula NaCl, representing equal proportions of sodium and ... for the salinity of the ocean and of the extracellular fluid of many multi-cellular organisms.