Consider the following statements: 1. Bordeaux mixture consists of sodium bromide and lime 2. Toothpastes contain calcium carbonate 3. Zinc amalgam is used in dental fillings 4. Liquid sodium is used as a coolant in nuclear reactors The correct statements are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 2, 3 and 4 only (d) 1, 2 and 3 only

Consider the following statements: 1. Bordeaux mixture consists of sodium bromide and lime 2. Toothpastes contain calcium carbonate 3. Zinc amalgam is used in dental fillings 4. Liquid sodium is used as a coolant in nuclear reactors The correct statements are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 2, 3 and 4 only (d) 1, 2 and 3 only
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Which of the following is used as a coolant in nuclear reactors? (1) Heavy water (2) Cadmium (3) Liquid sodium (4) Graphite

Description : Which of the following is used as a coolant in nuclear reactors? (1) Heavy water (2) Cadmium (3) Liquid sodium (4) Graphite

Last Answer : (3) Liquid sodium Explanation: Liquid metallic sodium may be used as the sole coolant, carrying heat from the core. Sodium has only one stable isotope, sodium-23. Sodium-23 is a very weak absorber of neutrons.

Reactors in commercial nuclear power plants in the U.S. are often referred to as thermal reactors. A thermal reactor uses: w) fissionable plutonium-239 as fuel. x) a relatively low heat output. y) neutrons moderated to relatively low energies. z) liquid sodium as a coolant.

Description : Reactors in commercial nuclear power plants in the U.S. are often referred to as thermal reactors. A thermal reactor uses: w) fissionable plutonium-239 as fuel. x) a relatively low heat output. y) neutrons moderated to relatively low energies. z) liquid sodium as a coolant.

Last Answer : ANSWER: Y -- NEUTRONS MODERATED TO RELATIVELY LOW ENERGIES.

Which of the following is NEVER used as a coolant in nuclear reactors: w) liquid nitrogen x) liquid sodium y) water z) helium gas

Description : Which of the following is NEVER used as a coolant in nuclear reactors: w) liquid nitrogen x) liquid sodium y) water z) helium gas

Last Answer : ANSWER: W -- LIQUID NITROGEN

Which is the most commonly used molten metal for cooling of nuclear reactors? (A) Calcium (B) Sodium (C) Mercury (D) Zinc

Description : Which is the most commonly used molten metal for cooling of nuclear reactors? (A) Calcium (B) Sodium (C) Mercury (D) Zinc

Last Answer : (B) Sodium

To reduce tooth decay most toothpastes contain a – (1) Bromide (2) Fluoride (3) Iodide (4) Chloride

Description : To reduce tooth decay most toothpastes contain a – (1) Bromide (2) Fluoride (3) Iodide (4) Chloride

Last Answer : (2) Fluoride Explanation: Fluoride in toothpastes prevent tooth, decay from progressing and can even reverse, or stop, early tooth decay. It works by promoting a chemical reaction in tooth enamel ... itself into enamel weakened by acid attack, making the tooth more resistant to future acid attacks.

To reduce tooth decay most toothpastes contain a (1) Bromide (2) Fluoride (3) Iodide (4) Chloride

Description : To reduce tooth decay most toothpastes contain a (1) Bromide (2) Fluoride (3) Iodide (4) Chloride

Last Answer : Fluoride

Which one is the major component of Bordeaux mixture a) Copper sulphate b) Sodium chloride c) Calcium chloride d) Magnesium sulphate

Description : Which one is the major component of Bordeaux mixture a) Copper sulphate b) Sodium chloride c) Calcium chloride d) Magnesium sulphate

Last Answer : a) Copper sulphate

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

Consider the following four measures (A-D) that could be taken to successfully grow chickpea in an area where bacterial blight disease is common. (A) Spray with Bordeaux mixture (B) Control of the insect vector of the disease pathogen (C) Use of only disease-free seeds (D) Use of varieties resistant to the disease Which two of the above measures can control the disease? (a) (C) and (D) (b) (A) and (D) (c) (B) and (C) (d) (A) and (B)

Description : Consider the following four measures (A-D) that could be taken to successfully grow chickpea in an area where bacterial blight disease is common. (A) Spray with Bordeaux mixture (B) Control of the insect vector of the disease pathogen (C) ... (D) (b) (A) and (D) (c) (B) and (C) (d) (A) and (B)

Last Answer : (b) (A) and (D)

Lime water contains (a) sodium hydroxide (b) calcium hydroxide (c) sodium carbonate (d) calcium chloride

Description : Lime water contains (a) sodium hydroxide (b) calcium hydroxide (c) sodium carbonate (d) calcium chloride

Last Answer : Ans:(b)

Heavy water is used as a coolant in nuclear reactors. Heavy water is (1) water rich in minerals (2) ozonised water (3) water containing minerals of heavy metal (4) water containing heavy isotope of hydrogen

Description : Heavy water is used as a coolant in nuclear reactors. Heavy water is (1) water rich in minerals (2) ozonised water (3) water containing minerals of heavy metal (4) water containing heavy isotope of hydrogen 

Last Answer : water containing heavy isotope of hydrogen

Which is used as a coolant in nuclear reactors? -General Knowledge

Description : Which is used as a coolant in nuclear reactors? -General Knowledge

Last Answer : The answer is 'Liquidsodium'

Which is used as a coolant in nuclear reactors? -General Knowledge

Description : Which is used as a coolant in nuclear reactors? -General Knowledge

Last Answer : answer:

Which is used as a coolant in nuclear reactors? -General Knowledge

Description : Which is used as a coolant in nuclear reactors? -General Knowledge

Last Answer : answer:

Which is used as a coolant in nuclear reactors?

Description : Which is used as a coolant in nuclear reactors?

Last Answer : – Liquid sodium

Thermal shield is used in high powered nuclear reactors to (A) Protect the walls of the reactor from radiation damageB) Absorb the fast neutrons(C) Slow down the secondary neutrons(D) Protect the fuel element from coming in contact with the coolant

Description : Thermal shield is used in high powered nuclear reactors to (A) Protect the walls of the reactor from radiation damage B) Absorb the fast neutrons (C) Slow down the secondary neutrons (D) Protect the fuel element from coming in contact with the coolant

Last Answer : (A) Protect the walls of the reactor from radiation damage

A FDA – approved ingredient for protection against painful sensitivity of the teeth due to cold, heat, acids, sweets or contact is (a) Dicalcium phosphate (b) Sodium lauryl sulfate (c) 5% potassium nitrate (d) Zinc chloride (e) Calcium carbonate

Description : A FDA – approved ingredient for protection against painful sensitivity of the teeth due to cold, heat, acids, sweets or contact is (a) Dicalcium phosphate (b) Sodium lauryl sulfate (c) 5% potassium nitrate (d) Zinc chloride (e) Calcium carbonate

Last Answer : Ans: C

The sodium compound used as coolant in atomic reactors?

Description : The sodium compound used as coolant in atomic reactors?

Last Answer : Liquid sodium

Fast breeder reactors do not (A) Use Th-232 as fissile fuel (B) Convert fertile material to fissile material (C) Use fast neutrons for fission (D) Use molten sodium as coolant

Description : Fast breeder reactors do not (A) Use Th-232 as fissile fuel (B) Convert fertile material to fissile material (C) Use fast neutrons for fission (D) Use molten sodium as coolant

Last Answer : (A) Use Th-232 as fissile fuel

The pH of water will be decreased to below pH 7 by the hydrolysis of which of the following? w) sodium carbonate x) sodium chloride y) ammonium chloride z) potassium bromide

Description : The pH of water will be decreased to below pH 7 by the hydrolysis of which of the following? w) sodium carbonate x) sodium chloride y) ammonium chloride z) potassium bromide

Last Answer : ANSWER: C -- AMMONIUM CHLORIDE

Caries which is close to the pulp chamber; on x rays you find ‘dens in dente’; the right treatment is: A. Zinc oxide eugenol cement and amalgam B. Pulpectomy C. Pulpotomy D. Calcium hydroxide on pulp and amalgam

Description : Caries which is close to the pulp chamber; on x rays you find ‘dens in dente’; the right treatment is: A. Zinc oxide eugenol cement and amalgam B. Pulpectomy C. Pulpotomy D. Calcium hydroxide on pulp and amalgam

Last Answer : B. Pulpectomy

Pick up the correct statement from the following: (A) Lime is available in Free State (B) Lime is available by dissolving calcium carbonate in water (C) Lime is available by calcining calcium carbonate at 900°C (D) Lime is nothing but calcium chloride

Description : Pick up the correct statement from the following: (A) Lime is available in Free State (B) Lime is available by dissolving calcium carbonate in water (C) Lime is available by calcining calcium carbonate at 900°C (D) Lime is nothing but calcium chloride

Last Answer : Answer: Option C

A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution In which (C) contains oxygen. The mixture

Description : A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution In which (C) contains oxygen. The mixture

Last Answer : A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the ... ) into red colour compound D. (D) All of these

A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution in which (C) contains oxygen. The mixture

Description : A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution in which (C) contains oxygen. The mixture

Last Answer : A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution ... (A) and (B) both D. (D) None of these

A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution In which (C) contains oxygen. The mixture

Description : A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in the solution In which (C) contains oxygen. The mixture

Last Answer : A red liquid (A) when treated with sodium carbonate gives a mixture of two sails (B) and (C) in ... orange red spots on starch paper D. (D) None

When restoring weakened cusps with dental amalgam you should consider: A. 2mm reduction while forming a flattened surface B. 2mm reduction while following the original contour of the cusps C. 4mm reduction while forming a flattened surface D. 4mm reduction while following the original contour of the surface

Description : When restoring weakened cusps with dental amalgam you should consider: A. 2mm reduction while forming a flattened surface B. 2mm reduction while following the original contour of the cusps C ... forming a flattened surface D. 4mm reduction while following the original contour of the surface

Last Answer : A. 2mm reduction while forming a flattened surface

Consider the following statements: 1. Carbyne is an allotrope of carbon. 2. Gasoline, used as a fuel in motor vehicles is a mixture of petrol and alcohol. 3. Petroleum is also known as 'liquid gold'. 4. The various components of crude oil are separated by fractional distillation. The correct statements are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

Description : Consider the following statements: 1. Carbyne is an allotrope of carbon. 2. Gasoline, used as a fuel in motor vehicles is a mixture of petrol and alcohol. 3. Petroleum is also known as 'liquid gold'. 4. The various components of crude ... (b) 1, 3 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

Last Answer : Ans:(b)

Lime water turns milky when carbon dioxide is passed through it. It is due to the for mation of: (1) Calcium Carbonate (2) Barium Carbonate (3) Calcium Hydrogen Carbonate (4) Calcium Oxide

Description : Lime water turns milky when carbon dioxide is passed through it. It is due to the for mation of: (1) Calcium Carbonate (2) Barium Carbonate (3) Calcium Hydrogen Carbonate (4) Calcium Oxide

Last Answer : (1) Calcium Carbonate Explanation: When carbon dioxide is passed through lime water for a short time, it turns lime water milky due to formation of a white precipitate of calcium carbonate.

For reclamation of alkaline soil — is used. a. Lime b. Calcium carbonate c. Gypsum d. None of these

Description : For reclamation of alkaline soil — is used. a. Lime b. Calcium carbonate c. Gypsum d. None of these

Last Answer : c. Gypsum

Quick lime is (A) Calcium carbonate (B) Calcium oxide (C) Calcium hydroxide (D) None of the above

Description : Quick lime is (A) Calcium carbonate (B) Calcium oxide (C) Calcium hydroxide (D) None of the above

Last Answer : Answer: Option B

Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of __________ percent of U-235 (i.e. fissile material). (A) 15 (B) 45 (C) 65 (D) 85

Description : Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of __________ percent of U-235 (i.e. fissile material). (A) 15 (B) 45 (C) 65 (D) 85

Last Answer : (D) 85

A mixture of chlorine & sodium bromide acts as a/an (A) Insecticides (B) Analgesic drug (C) Fire retardant (D) Hydrogenation catalyst

Description : A mixture of chlorine & sodium bromide acts as a/an (A) Insecticides (B) Analgesic drug (C) Fire retardant (D) Hydrogenation catalyst

Last Answer : (C) Fire retardant

What source and strength of radioactivity could cause mercury dental fillings to become radioactive?

Description : What source and strength of radioactivity could cause mercury dental fillings to become radioactive?

Last Answer : answer:In general, things don't become radioactive simply by being exposed to radioactivity. (I hate to say never , because I don't know if an incredibly large radioactive burst ... think it is possible for dental fillings to become radioactive from exposure to (survivable) ionizing radiation.

Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal the hardness of water and a gas C is evolved. The gas C when passed through lime water ,turns it milky. Identify A,B and C. (a) A is sodium hydrogen carbonate ,B is hydrous sodium carbonate and c is carbon dioxide (b)A is sodium carbonate ,B is sodium hydrogen carbonate and c is Carbon monoxide © A is baking soda ,B is washing soda and C is carbon dioxide (d) both a and c

Description : Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal the hardness of water and a gas C is evolved. The gas C when passed through lime water ,turns it ... © A is baking soda ,B is washing soda and C is carbon dioxide (d) both a and c

Last Answer : (d) both a and c

Had any dental fillings lately? Not crowns; fillings.

Description : Had any dental fillings lately? Not crowns; fillings.

Last Answer : It seems like the fluoride in water is making cavities less common but also you get less as you age, I’ve heard. Many of the problems – crowns, etc. – come from old fillings that have worn out or weakened the tooth.

The common alloy, babbit metal, which is composed of tin, antimony, and copper, is best known for its use in: w) magnets x) bearings y) dental fillings z) drinking vessels

Description : The common alloy, babbit metal, which is composed of tin, antimony, and copper, is best known for its use in: w) magnets x) bearings y) dental fillings z) drinking vessels

Last Answer : ANSWER: X -- BEARINGS

Write balanced chemical equations for the following reactions: (a) Dilute sulphuric acid reacts with aluminium powder. (b) Dilute hydrochloric acid reacts with sodium carbonate. (c) Carbon dioxide is passed through lime water. -Chemistry

Description : Write balanced chemical equations for the following reactions: (a) Dilute sulphuric acid reacts with aluminium powder. (b) Dilute hydrochloric acid reacts with sodium carbonate. (c) Carbon dioxide is passed through lime water. -Chemistry

Last Answer : i hope it helped you

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.

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

The mineral halite is: w) potassium chloride x) sodium chloride y) calcium chloride z) calcium bromide

Description : The mineral halite is: w) potassium chloride x) sodium chloride y) calcium chloride z) calcium bromide

Last Answer : ANSWER: X -- SODIUM CHLORIDE

'Blight' the disease of potato can be cured by (a) Dionine (b) Bordeaux mixture (c) Diathane (d) DDT

Description : 'Blight' the disease of potato can be cured by (a) Dionine (b) Bordeaux mixture (c) Diathane (d) DDT

Last Answer : Ans: (b)

Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide? (a) Loose smut of wheat (b) Black rust of wheat (c) Bacterial leaf blight of rice (d) Downy mildew of grapes

Description : Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide? (a) Loose smut of wheat (b) Black rust of wheat (c) Bacterial leaf blight of rice (d) Downy mildew of grapes

Last Answer : d) Downy mildew of grapes

Damping off is effectively controlled by — a. Thiram b. Copper oxychloride c. Bordeaux mixture d. None of these

Description : Damping off is effectively controlled by — a. Thiram b. Copper oxychloride c. Bordeaux mixture d. None of these

Last Answer : b. Copper oxychloride

Bordeaux mixture is a/an (A) Fertiliser (B) Inorganic fungicide (C) Insecticide (D) Explosive

Description : Bordeaux mixture is a/an (A) Fertiliser (B) Inorganic fungicide (C) Insecticide (D) Explosive

Last Answer : (B) Inorganic fungicide

Which of the following types of nuclear reactors is most prone to radioactive hazards? (A) Pressurised water reactor (B) Gas cooled reactor (C) Molten sodium cooled reactor (D) Boiling water reactor

Description : Which of the following types of nuclear reactors is most prone to radioactive hazards? (A) Pressurised water reactor (B) Gas cooled reactor (C) Molten sodium cooled reactor (D) Boiling water reactor

Last Answer : (D) Boiling water reactor

Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor? (A) Molten sodium cooled (B) CO2 gas cooled (C) Pressurised water (D) Boiling water

Description : Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor? (A) Molten sodium cooled (B) CO2 gas cooled (C) Pressurised water (D) Boiling water

Last Answer : (D) Boiling water

Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes? (1) Borax (2) Saltpetre (3) Hydrogen peroxide (4) Sodium chloride

Description : Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes? (1) Borax (2) Saltpetre (3) Hydrogen peroxide (4) Sodium chloride

Last Answer : (4) Sodium chloride Explanation: Antiseptics are antimicrobial substances that are applied to living tissue/skin to reduce the possibility of infection, sepsis, or putrefaction. Antiseptics are generally ... the body, and from disinfectants, which destroy microorganisms found on non-living objects.

Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ? (1) Borax (2) Saltpetre (3) Hydrogen peroxide (4) Sodium chloride

Description : Which of the following compounds is commonly used as an antiseptic in mouthwashes and toothpastes ? (1) Borax (2) Saltpetre (3) Hydrogen peroxide (4) Sodium chloride

Last Answer : Sodium chloride

In Kraft process of paper manufacture, white cooking liquor consists of caustic soda (A) Sodium sulphide & sodium carbonate (B) Sodium sulphite & sodium carbonate (C) Sodium sulphite & sodium sulphide (D) None of these

Description : In Kraft process of paper manufacture, white cooking liquor consists of caustic soda (A) Sodium sulphide & sodium carbonate (B) Sodium sulphite & sodium carbonate (C) Sodium sulphite & sodium sulphide (D) None of these

Last Answer : (A) Sodium sulphide & sodium carbonate

Why are Calcium Carbide (CaC 2 ), Carbon monoxide (CO), Carbon dioxide (CO 2 ), Hydrogen cyanide (HCN) and calcium carbonate (CaCO 3 ) classified as inorganic compounds through they contain carbon?

Description : Why are Calcium Carbide (CaC 2 ), Carbon monoxide (CO), Carbon dioxide (CO 2 ), Hydrogen cyanide (HCN) and calcium carbonate (CaCO 3 ) classified as inorganic compounds through they contain carbon?

Last Answer : These compounds contain only one or two carbon atoms per formula unit and contain no carbon-carbon (C-C) bonds or carbon-hydrogen bonds. Hence they are classified as inorganic compounds.