Description : Temporary hardness of water is due to the presence of which thing? -General Knowledge
Last Answer : answer:
Description : Temporary hardness of water is due to the presence of which salts?
Last Answer : Bicarbonates of Calcium & Magnesium
Description : Temporary hardness of water is due to the presence of?
Last Answer : bicarbonates of calcium and magnesium
Description : Presence of __________ hardness is responsible for the temporary hardness in water. (A) Carbonate (B) Calcium (C) Chloride (D) Sulphate
Last Answer : (B) Calcium
Description : . Presence of iron and manganese in water causes (A) Reduction in its dissolved oxygen content (B) Discoloration of bathroom fixtures (C) Temporary hardness (D) None of these
Last Answer : (B) Discoloration of bathroom fixtures
Description : The temporary hardness of water is due to :
Last Answer : The temporary hardness of water is due to : A. `CaCl_(2)` B. `Ca(HCO_(3))_(2)` C. NaCl D. `Na_(2)SO_(4)`
Description : Permanent hardness of water is due to the presence of which salts
Last Answer : Chlorides and sulphates of Calcium & Magne- sium
Description : Permanent hardness of water is due to the presence of?
Last Answer : sulphates and chlorides of calcium and magne- sium
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
Description : The reaction involved during the removal of temporary hardness of water is:
Last Answer : The reaction involved during the removal of temporary hardness of water is: A. `2CaCl_(2)+(NaPO_(3))_ ... (Delta)rarrCaCO_(3)+H_(2)O+CO_(2)darr`
Description : Temporary hardness of water can be re- moved by?
Last Answer : repeated boiling or adding lime
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.
Description : Name the method used to remove temporary hardness of water?
Last Answer : Ans-Clark s method OR By Boiling
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
Description : Magnesium and calcium __________ cause temporary hardness of water. (A) Carbonates (B) Bicarbonates (C) Phosphates (D) Sulphates
Last Answer : (B) Bicarbonates
Description : Temporary hardness of water can be removed by (A) Addition of alum (a coagulant) (B) Boiling (C) Filtration (through gravity sand filter) (D) Addition of lime
Last Answer : (B) Boiling
Description : Pick out the true statement pertaining to water treatment. (A) Slow sand filters can remove colour completely (B) Activated carbon can be used for taste & odour control without subsequent filtration ... of water (D) Normally, the turbidity is removed by adding a coagulant prior to sedimentation
Last Answer : (D) Normally, the turbidity is removed by adding a coagulant prior to sedimentation
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
Last Answer : (B) Sodium chloride
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
Description : Carbonates in water produce (A) Temporary hardness (B) Permanent hardness (C) Acidity (D) Alkanity
Last Answer : (A) Temporary hardness
Description : The temporary hardness of water can be removed by (A) Boiling (B) Adding lime (C) Adding alum (D) Filtration
Last Answer : (A) Boiling
Description : By which reason temporary and permanent hardness occur ?
Last Answer : By which reason temporary and permanent hardness occur ?
Description : Presence of H2S in raw water (to be chlorinated) results in the (A) Reduced softening capacity of zeolite (B) Increased dosage of chlorine to provide a disinfecting residual in the water (C) Easy removal of its hardness (D) None of these
Last Answer : (B) Increased dosage of chlorine to provide a disinfecting residual in the water
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
Description : Presence of 0.3 to 0.5% arsenic in copper increases its (A) Ductility (B) Malleability (C) Tenacity & hardness (D) Electrical conductivity
Last Answer : (C) Tenacity & hardness
Description : Presence of nitrogen in steel (A) Makes it brittle (B) Increases its strength (C) Increases its hardness (D) Is desirable
Last Answer : (A) Makes it brittle
Description : Pick out the wrong statement. (A) Addition of methane to the furnace atmosphere reduces decarburising by hydrogen (B) Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon ... the metal surface) cause nitride formation with increase in surface hardness (D) None of these
Last Answer : (D) None of these
Description : Smith's test of stones is performed to find out (A) The presence of soluble matter of stone (B) The compressive strength of the stone (C) The hardness of the stone (D) The toughness of the stone
Last Answer : Answer: Option A
Description : 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
Last Answer : (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.
Description : The hardness of water is due to the pres- ence of which salts?
Last Answer : calcium and magnesium salts
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
Description : By boiling water, hardness can be removed if it is due to (A) Calcium sulphate (B) Magnesium sulphate (C) Calcium nitrate (D) Calcium bicarbonate
Last Answer : (D) Calcium bicarbonate
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
Description : What is the hardness of water due to?
Last Answer : The hardness of water is due to some chemicals that get. Dissolved in rain water when it falls.
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
Description : Green potato tuber is inedible due to: a. Carcinogenic b. Hardness c. Hollowness d. None of above
Last Answer : Carcinogenic
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
Description : Temporary halt to iPhone 5 production due to protests in the Chinese factory against their horrific conditions. Will the world join the protest?
Last Answer : Of course not. We’ve known about the terrible conditions in those factories for years and it hasn’t stopped the products from selling like hotcakes.
Description : When I go to check my AOL mail, it says "Mailbox not available due to temporary maintenance." Is this something others have experienced?
Last Answer : AOL took the mail server offline for site maintenance. It’s nothing new. All websites do this every once and awhile. To go a little off topic, Fluther went offline for site maintenance last night for a little bit.
Description : Asserarion:Bleaching action action of `SO_(2)` is temporary and by reduction. Reason: The colour of material is regained due to oxidation by air.
Last Answer : Asserarion:Bleaching action action of `SO_(2)` is temporary and by reduction. Reason: The colour of material is regained due to oxidation by air.
Last Answer : Asserarion:Bleaching action action of `SO_(2)` is temporary and by reduction. Reason: The colour of ... -I is not correct and Statement-II is correct
Description : Which of the following is a cause of frictional unemployment? (a) Non-availability of work due to strike and lock-out. (b) Temporary unemployment due to change over in jo(b) ; (c) Both ; (d) None
Last Answer : (c) Both ;
Description : ____________ is the temporary withdrawal of a person's license or driving privileges. -General Knowledge
Last Answer : Suspension is the temporary withdrawal of a person's license or driving privileges.
Description : For how many years are temporary members of the United Nations Security Council elected? -General Knowledge
Description : Who was elected the temporary president of the Constituent Assembly? -General Knowledge
Description : What is a computer's temporary memory called? -General Knowledge
Last Answer : A computer's memory is also called RAM which is an acronym for Random Access Memory. A computer's memory is where information is temporarily stored while it is being accessed or worked on.
Last Answer : The Security Council consists of five permanent members (China, France, Russian Federation, United Kingdom of Great Britain and Northern Ireland and United States of America) and 10 non-permanent members elected by the General Assembly for a term of two years.
Description : A metallic alloy in general as compared to their pure metal components is (A) More corrosion resistant (B) Having higher melting point (C) Having lower hardness, reactivity and fusibility (D) Having lower electrical conductivity
Last Answer : (A) More corrosion resistant