Description : When `P_(4)O_(10)` is dissolved in water, the acid formed finally is :
Last Answer : When `P_(4)O_(10)` is dissolved in water, the acid formed finally is : A. `H_(3)PO_(2)` B. `H_(3)PO_(4)` C. `H_(3)PO_(3)` D. `H_(4)P_(2)O_(7)`
Description : If `10g` of `V_(2)O_(5)` is dissolved in acid and is reduced to `V^(2+)` by zinc metal, how many mole `I_(2)` could be reduced by the resulting soluti
Last Answer : If `10g` of `V_(2)O_(5)` is dissolved in acid and is reduced to `V^(2+)` by zinc metal, how many mole `I_(2 ... 127`) A. 0.11 B. 0.22 C. 0.055 D. 0.44
Description : The major role of flourspar, `CaF_(2)` which is added in small amount in the electrolytic reduction of `Al_(2)O_(3)` dissolved on fused cryolite in fu
Last Answer : The major role of flourspar, `CaF_(2)` which is added in small amount in the electrolytic reduction ... the rate of oxidation of carbon at the anode
Description : Aluminium is obtained by the electrolysis of pure of `Al_(2)O_(3)` dissolved in
Last Answer : Aluminium is obtained by the electrolysis of pure of `Al_(2)O_(3)` dissolved in A. Alumina B. Bauxite C. Cryolite D. Felspar
Description : Dilution method of disposing of sewage, is not preferred to A. When sewage is fresh B. When diluting water has high dissolved oxygen content C. When diluting water is used for water supply near the point of sewage disposed D. When the diluting water is having flow currents
Last Answer : ANS: C
Description : Steam condensate is recovered by steam traps and recycled for use as boiler feed water, because of its low (A) Hardness (B) Dissolved solids content (C) Suspended solids content (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Dissolved oxygen content in river water is around __________ ppm. (A) 5 (B) 100 (C) 250 (D) 500
Last Answer : (A) 5
Description : Pick out the wrong statement. (A) Caustic embrittlement of boiler's metallic parts is caused by highconcentration of caustic soda in boiler feed water (B) Cooling and freezing of water kills the ... goes on decreasing (D) Dissolved oxygen content in high pressure boiler feed water should be nil
Last Answer : (B) Cooling and freezing of water kills the bacteria present in it
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 : Deaeration of high pressure boiler feed water is done to reduce (A) Foaming from boilers (B) Its dissolved oxygen content (C) Its silica content (D) Caustic embrittlement
Last Answer : (B) Its dissolved oxygen content
Description : The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water. (A) Dissolved oxygen content (B) Biological oxygen demand (C) Vapor pressure (D) All (A), (B) and (C)
Last Answer : (A) Dissolved oxygen content
Description : For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm. (A) 10000 (B) 5 (C) 500 (D) 1000
Last Answer : (B) 5
Description : Chlorination of water does not remove (A) Ammonia content (B) B.O.D. (C) Organic matter content (D) Dissolved oxygen
Last Answer : (D) Dissolved oxygen
Description : The best guide to judge the general quality of water is the measurement of its (A) pH value (B) Electrical conductivity (C) Turbidity (D) Dissolved oxygen content
Last Answer : (B) Electrical conductivity
Description : Crude oil is sometimes termed sweet because it is – (1) sweet in taste due to dissolved sugars (2) mildly sweet due to low sulphur content (3) less acidic (4) less alkaline
Last Answer : (2) mildly sweet due to low sulphur content Explanation: Crude oil is sometimes termed sweet amount of hydrogen sulphide and Carbon dioxide.
Description : Presence of carbonaceous matter in the sewage (A) Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures (B) Reduces sulphate ions to sulphides causing obnoxious ... quantity of chlorine used for its purification (D) All (A), (B) and (C)
Description : Sunlight (A) Helps growth of bacterias (B) Impedes growth of algae (C) Increases dissolved oxygen content (D) Reduces turb
Last Answer : (B) Impedes growth of algae
Description : Crude oil is sometimes termed sweet because it is : (1) sweet in taste due to dissolved sugars (2) mildly sweet due to low sulphur content (3) less acidic (4) less alkaline
Last Answer : mildly sweet due to low sulphur content
Description : The temperature of boiling water in a steam engine may be high because - (1) there are dissolved substances in water (2) there is low pressure inside the boiler (3) there is high pressure inside the boiler (4) the lire is at very high temperature
Last Answer : (3) there is high pressure inside the boiler Explanation: In the boiler of a steam engine, there is a firebox where coal is shoveled into. The coal is kept burning at a very high temperature, and ... reservoir; the steam is then controlled by a slide valve to move into a cylinder to push the piston.
Description : Pick up the correct statement from the following: A. Hydrogen sulphide gas in excess, may cause corrosion of concrete sewers B. 4 ppm of Dissolved Oxygen (D.O.) is ensured before discharging the treated ... river C. Solubility of oxygen in sewage is 95% of that of distilled water D. All the above
Last Answer : ANS: D
Description : Ground water from artesian wells (A) Contains no suspended materials (B) Contains dissolved salts (C) May be saltish and hard (D) All the above
Last Answer : (D) All the above
Description : Bitumen may be dissolved in (A) Carbondioxide (B) Water (C) Sodium chloride (D) Carbon disulphide
Last Answer : Answer: Option D
Description : The temperature of boiling water in a steam engine may be high because : (1) there are dissolved substances in water (2) there is low pressure inside the boiler (3) there is high pressure inside the boiler (4) the fire is at very high temperature
Last Answer : there is high pressure inside the boiler
Description : Which one of the following is not correct about the Panchayats as laid down in Part IX of the Constitution of India? (1) The Chairperson of a Panchayat needs to be directly elected by people in ... years. (4) The State Legislature may by law make provisions for audit of accounts of the Panchayats.
Last Answer : (3) Unless dissolved earlier, every Panchayat continues for a period of five years. Explanation: Inflation in the country continued to moderate during 2017-I8. Consumer Price Index (CPI) based ... stated in the Economic Survey 2017-18. There was a significant reduction in food inflation too.
Description : The phenomenon occuring during pumping of a liquid solution containing dissolved gases, which may come out of the solution giving rise to gas pockets, is termed as (A) Evaporation (B) Cavitation (C) Sublimation (D) Stripping
Last Answer : (B) Cavitation
Description : At a given temperature, the volume of a gas dissolved in a solvent __________ with increase in pressure. (A) Increases (B) Decreases (C) Remains unchanged (D) May increase or decrease; depends on the gas
Last Answer : C) Remains unchanged
Description : The empirical formula of an acid is `CH_(2)O_(2)`, the probable molecular formula of acid may be :-
Last Answer : The empirical formula of an acid is `CH_(2)O_(2)`, the probable molecular formula of acid may be :- A. `CH_(2)O` ... )H_(4)O_(2)` D. `C_(3)H_(6)O_(4)`
Description : In how many of the following reactions `N_(2)` gas may be released `{:((a) NH_(4)NO_(2) overset(Delta)rarr,(b) (NH_(4))_(2) Cr_(2)O_(7) overset(Delta)
Last Answer : In how many of the following reactions `N_(2)` gas may be released `{:((a) NH_(4)NO_(2) overset(Delta) ... i) Ba(N_(3))_(2) overset(Delta) rarr):}`
Description : For reactions of metals to form their oxide one gram `O_(2)` molecule is used may be plotted graphically against temperature Select incorrect using gi
Last Answer : For reactions of metals to form their oxide one gram `O_(2)` molecule is used may be plotted graphically ... rarr 2CO(g), DeltaG^(0)=x kJ//mol`
Description : `Na_(2)S_(2)O_(3)` may react with the compounds given in coloum I. `Na_(2)S_(2)O_(3)` exhibits the properties of the type given in the coloum II, matc
Last Answer : `Na_(2)S_(2)O_(3)` may react with the compounds given in coloum I. `Na_(2)S_(2)O_(3)` exhibits the ... "),("d)",I_(2),,"s) an antichlor"):}`