Description : The optical property of a water body depends on: (A) Absorption by the dissolved material (B) Absorption by the suspended particulate matter (C) Scattering by the suspended particulate matter (D) All of these
Last Answer : Answer: Option 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 : Which of the following impurities in feed water for high pressure boiler is the most detrimental? (A) Silica (B) Dissolved oxygen (C) Suspended salt (D) Dissolved salt
Last Answer : (A) Silica
Description : The most detrimental impurity in high pressure boiler feed water is (A) Suspended salt (B) Dissolved salt (C) Silica (D) Turbidity
Last Answer : Option C
Description : Turbidity of water is an indication of the presence of (A) Suspended inorganic matter (B) Dissolved solids (C) Floating solids (D) Dissolved gases
Last Answer : (A) Suspended inorganic matter
Description : The effluent of a septic tank is A. Fit for discharge into any open drain B. Foul and contains dissolved and suspended solids C. As good as that from a complete treatment D. None of these
Last Answer : ANS: A
Description : The domestic sewage in large cities (a) has a high BOD as it contains both aerobic and anaerobic bacteria (b) is processed by aerobic and then anaerobic bacteria in the secondary treatment in ... sewage contains adequate oxygen (d) has very high amount of suspended solids and dissolved salts.
Last Answer : (b) is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs)
Description : Sweat contains (a) pure water (b) water, salt and waste matter (c) phosphoric acid (d) calcium phosphate and water
Last Answer : Ans:(b)
Description : The specific weight of sea water is __________ that of pure water. (A) Same as (B) Less than (C) More than (D) None of these
Last Answer : Answer: Option 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 : Brackish water which contains mostly dissolved salt, can be purified by the __________ process. (A) Reverse osmosis (B) Sand filter (C) Lime soda (D) Permutit
Last Answer : (A) Reverse osmosis
Description : how you could show that sea water contains more dissolved material than tap water?
Last Answer : it contains dissolved water 'salt'
Description : Tri-sodium phosphate is used in boiler water treatment to reduce (A) Turbidity (B) Caustic embrittlement (C) Suspended silica (D) Dissolved oxygen
Last Answer : (B) Caustic embrittlement
Description : Removal of __________ is accomplished by aeration of water. (A) Dissolved gases (B) Suspended solids (C) Dissolved solids (D) None of these
Last Answer : (A) Dissolved gases
Description : Lagoons used for purification of polluted water (A) Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds (B) Use micro-organisms/bacteria in presence of dissolved oxygen (C) Gives an ... 1 mg/litre and BOD = 3.8 mg/litre (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Sand generally contains salt if it is obtained from: (A) Nala beds (B) River beds (C) Sea beds (D) None of these
Description : Pick up the incorrect statement from the following: (A) Iron salts produce heavy flocks and hence remove more suspended matter (B) Iron salts remove hydrogen sulphides (C) Iron salts can be used over a limited range of pH values (D) Iron salts impart corrosiveness to water
Last Answer : (C) Iron salts can be used over a limited range of pH values
Description : In domestic sewage, suspended solids, colloidal and dissolved materials constitute
Last Answer : In domestic sewage, suspended solids, colloidal and dissolved materials constitute A. 0.1 B. 0.056 C. 0.027 D. 0.001
Description : If the President of India exercises his power as provided under Article 356 of the Constitution in respect of a particular State, then - (1) the Assembly of the State is automatically dissolved. (2) ... Article 19 is suspended in that State. (4) the President can make laws relating to that State.
Last Answer : (2) the powers of the Legislature of that State shall be exercisable by or under the authority of the Parliament. Explanation: The President's Rule can be proclaimed under Article 356... He can declare ... of the state legislature are to be exercised by the Parliament. So "B" is the right answer.
Description : Imhoff cone is used to determine A. Settleable solids B. Suspended solids C. Dissolved solids D. None of these
Description : The function of skimming tank in sewage treatment is to remove __________ substances. (A) Dissolved solid (B) Suspended solid (C) Oil & fatty (D) Gritty & inorganic
Last Answer : (C) Oil & fatty
Description : Quality of water is said to be good if it is (A) Free from suspended matter (B) Colourless (C) Free from pathogenic organism (D) All the above
Description : Consider the following statements. The role of the gravel bed in a rapid sand filter is : 1. To filter out large suspended matter 2. To support the sand bed above it 3. To prevent the escape of sand particles 4. To uniformly ... and 5 b) 2, 3 and 4 only c) 3, 4 and 5 only d) 1, 2 and 3 only
Last Answer : b) 2, 3 and 4 only
Description : The ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature is called (A) Density of liquid (B) Specific gravity of liquid (C) Compressibility of liquid (D) Surface tension of liquid
Last Answer : Answer: Option B
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 : Consider the following statements : Activated sludge process can be said to comprise : 1. Conversion of dissolved organic matter into biological flocs 2. Removal of dissolved BOD of the waste water 3. Digestion of the sludge Which ... 2 and 3 (b) 1 and 2 only (c) 2 and 3 only (d) 1 and 3 only
Last Answer : (b) 1 and 2 only
Description : A suspended particle falls through a height minutes. If the viscosity of water is and specific gravity of the particle is , the diameter of the particle is (where M is a constant factor) (A) 103M (H/t) (B) 104M (H/t) (C) 105M (H/t) (D) 102M (H/t)
Description : Sea water is saltier than rain water because – (1) rivers wash away salts from earth and pour them into the sea (2) sea beds have salt producing mines (3) sea animals are salt producing (4) the air around the sea is saltish
Last Answer : (1) rivers wash away salts from earth and pour them into the Explanation: Sea water is saltier than rain water because rivers wash away salts from earth and pour them into the sea.
Description : Sea water is saltier than rain water because – (1) Sea animals are salt producing (2) The air around the sea is saltish (3) Rivers wash away salts from earth and pour them into the sea (4) Sea beds have salt producing mines
Last Answer : (3) Rivers wash away salts from earth and pour them into the sea Explanation: Seawater is salty because rainwater dissolves the salt minerals found in soil and rocks as it travels through rivers ... sea The rain that falls on the land contains some dissolved carbon dioxide from the surrounding air.
Description : Sea water is saltier than rain water because (1) Sea animals are salt producing (2) The air around the sea is saltish (3) Rivers wash away salts from earth and pour them into the sea (4) Sea beds have salt producing mines
Last Answer : Rivers wash away salts from earth and pour them into the sea
Description : Sea water is saltier than rain water because (1) rivers wash away salts from earth and pour them into the sea (2) sea beds have salt producing mines (3) sea animals are salt producing (4) the air around the sea is saltish
Last Answer : rivers wash away salts from earth and pour them into the sea
Description : Commercial nitric acid is coloured because it contains dissolved – (1) Oxygen (2) Nitrous oxide (3) Nitrogen dioxide (4) Coloured impurities
Last Answer : (3) Nitrogen dioxide Explanation: Commercial nitric acid has a brown colour due to dissolved NO2. The procedure of bubbling dry air through warm commercial nitric acid, is to drive away the dissolved nitrogen dioxide so that the acid becomes colourless.
Description : Commercial nitric acid is coloured because it contains dissolved : (1) Oxygen (2) Nitrous oxide (3) Nitrogen dioxide (4) Coloured impurities
Last Answer : Nitrogen dioxide
Description : What is the resulting concentration (in molL) of aqueous hydrochloric acid if 500 mL of its gaseous form at 300 K and 100 kPa will be dissolved in 100 mL pure water Use 8.314 kPaL(Kmol)?
Last Answer : Feel Free to Answer
Description : Does sea salt taste the same no matter where it was produced?
Last Answer : I wouldn’t think so. Different oceans have different minerals.
Description : Pure (R) Mandelic acid has specific rotation of 150. If a sample contains 60% of the R and 40% of its enantiomer, the `[alpha]` of his solution is.
Last Answer : Pure (R) Mandelic acid has specific rotation of 150. If a sample contains 60% of the R and 40% of its enantiomer, the `[alpha]` of his solution is.
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 : Pick out the wrong statement (A) Co-current absorbers are usually used, when the gas to be dissolved in the liquid is a pure substance (B) In case of gas absorption, HETP is ... reaction (D) In actual practice, absorption is an endothermic process, while stripping is an exothermic process
Last Answer : (D) In actual practice, absorption is an endothermic process, while stripping is an exothermic process
Description : Co-current absorbers are usually used when the gas to be dissolved in the liquid is (A) Sparingly soluble (B) Highly soluble (C) A pure substance (D) A mixture
Last Answer : (C) A pure substance
Description : When the gas to be dissolved in liquid is a/an __________ then normally co-current adsorber are used. (A) Mixture of two gases (B) Pure gas (C) Ideal gas (D) Sparingly soluble gas
Last Answer : (B) Pure gas
Description : When a solute is dissolved in a pure solvent, the resulting freezing point is: w) higher than pure solvent x) lower than pure solvent y) does not change z) cannot tell from this information
Last Answer : ANSWER: X -- LOWER THAN PURE SOLVENT
Description : A tape of length and weight kg/m is suspended at its ends with a pull of kg, the sag correction is (A) l3W²/24P² (B) l²W3 /24P² (C) l²W²/24P 3 (D) lW²/24P
Last Answer : (A) l3W²/24P²
Description : A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is (A) 4.5 kN/m3 (B) 6 kN/m3 (C) 7.5 kN/m3 (D) 10 kN/m3
Description : Which is the most practical and economical method for removal of suspended solid matter from polluted water? (A) Sedimentation (B) Skimming off (C) Chlorination (D) Biological oxidation
Last Answer : (A) Sedimentation
Description : 10g sample of bleaching powder was dissolved into water to make the solution one litre. To this solution 35 mL of 1.0 M Mohr salt solution was added c
Last Answer : 10g sample of bleaching powder was dissolved into water to make the solution one litre. To this solution 35 ... Cl_(2)` approximately is (mol wt = 71)
Description : Why does table salt dissolved readily in water?
Last Answer : It is an Ionic compound just as water is.
Description : Which one among the following substances evolved heat when dissolved in water? (1) Glucose (2) Fructose (3) Quick lime (4) Salt peter
Last Answer : (3) Quick lime Explanation: Quicklime is a widely used chemical compound. It is a white, caustic, alkaline, crystalline solid at room temperature. When limestone is heated, at about 1000° C it undergoes thermal decomposition.
Description : A column of water within xylem vessels of tall trees does not break under its weight because of (a) lignification of xylem vessels (b) positive root pressure (c) dissolved sugars in water (d) tensile strength of water.
Last Answer : (d) tensile strength of water.
Description : After a while, 2/3 drops of urine come out. What is the solution ? After 5/10 minutes after I urinate, 3/4 drops of urine come out alone !! It is very difficult for me to pray ,,, I can not be pure and ... ,,,! Because it is a problem for me to worship ,, !! I hope I get the answer ,,,, thank you
Last Answer : After urinating, you hold the tissue on the head of the penis and walk for 1 minute. Then it will not happen again.
Description : Assertion: Suspended particulate matter(SPM) is an important pollutant released by diesel vehicles. Reason : Catalytic convertes greatly reduce pollut
Last Answer : Assertion: Suspended particulate matter(SPM) is an important pollutant released by diesel vehicles. Reason : ... but reason is wrong D. Both are wrong