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 : Oxidation process results in the formation of A. Carbon dioxide B. Nitrates C. Sulphates D. All the above
Last Answer : ANS: D
Description : Injurious effects of sulphates can be replaced with the addition of ________: a. Nitrates b. Phosphates c. Ammonia d. Ca & Mg
Last Answer : Nitrates
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 : . Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water. (A) SO3 (B) Cl2 (C) NH3 (D) SO2
Last Answer : (B) Cl2
Description : Which of the following is not an air pollutant ? A. Smoke B. Carbon Dioxide C. Nitrogen Gas D. Sulphur Dioxide
Last Answer : C. Nitrogen Gas
Description : Acid rain is due to increase in atmospheric concentration of (a) ozone and dust (b) CO2 and CO (c) SO3 and CO (d) SO2 and NO2
Last Answer : (d) SO2 and NO2.
Description : Acid rain is due to increase in atmospheric concentration of (a) ozone and dust (b) CO2 and CO (c) SO3 and CO (d) SO2 and NO2.
Description : Acid rain is caused by increase in the atmospheric concentration of (a) CO2 and CO (b) O3 and dust (c) SO2 and NO2 (d) SO3 and CO.
Last Answer : (c) SO2 and NO2
Description : Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the (A) Industrial chimney exhaust (B) Automobiles exhaust (C) Photochemical reaction in polluted atmosphere (D) Burning of domestic fuel
Last Answer : (B) Automobiles exhaust
Description : Microbial degradation of nitrates into atmospheric nitrogen is known as- (1) Ammonification (2) Nitrification (3) Denitrification (4) Putrefaction
Last Answer : (3) Denitrification Explanation: Denitrification is the biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide. It refers to nitrate reduction by bacterial species such as ... (N2). These bacteria use nitrate as an electron acceptor instead of oxygen during respiration.
Description : Nitrogen oxidation (nitrification)refers to the A- conversion of ammonium ions into nitrates through the activities of certain bacteria B- changing of atmospheric nitrogen (N2) to nitrogen compounds C- sulfur is oxidized to the sulfate form through Thiobacillusbacteria D- none of the above
Last Answer : conversion of ammonium ions into nitrates through the activities of certain bacteria
Description : Microbial degradation of nitrates into atmospheric nitrogen is known as : (1) Ammonification (2) Nitrification (3) Denitrification (4) Putrefaction
Last Answer : Denitrification
Description : In almost all Indian metropolitan cities such as Delhi, the major atmospheric pollutant/s is/are
Last Answer : In almost all Indian metropolitan cities such as Delhi, the major atmospheric pollutant/s is/are ... dioxide and carbon monoxide D. Oxides of nitrogen
Description : Which one of the following is normally not an atmospheric pollutant ? a) CO b) CO2 c) SO2 d) Hydrocarbon.
Last Answer : b) CO2
Description : A 68-year-old male who underwent a repair of an abdominal aortic aneurysm 5 days ago, develops tachycardia, tachypnea, hypotension with cool, pale, mottled cyanotic extremities. He ... use of moderate doses of inotropic agents e. Afterload reduction with nitroprusside is absolutely contraindicated
Last Answer : Answer: a, b, d Intrinsic cardiogenic shock results from failure of the heart as an effective pump. Coronary artery disease is the most common cause of myocardial ... hemodynamic monitoring. Infusion of afterload-reducing agents can be administered in conjunction with inotropic support
Description : A primary objective of dual exchange rates is to allow a country the ability to insulate its balance of payments from net: A. Current account transactions B. Unilateral transfers C. Merchandise trade transactions D. Capital account transactions
Last Answer : D. Capital account transactions
Description : Rather than constructing their own currency baskets, many nations peg the value of their currencies to a currency basket defined by the International Monetary Fund. Which of the following illustrates this ... . IMF tranche B. Special Drawing Rights C. Primary reserve asset D. Swap facility
Last Answer : B. Special Drawing Right
Last Answer : D. Capital account transaction
Description : Which of these is primary sector A. Communication B. Banking C. Construction D. Poultry farming
Last Answer : D. Poultry farming
Description : The primary stakeholders are: A. Customers. B. Suppliers. C. Shareholders. D. Creditors.
Last Answer : C. Shareholders.
Description : Although the promotion mix is the company’s primary communication activity, the __________________ must be coordinated for greatest communication impact. A. Organizational culture B. Entire marketing mix C. Demand mix D. Profit variables in a company
Last Answer : B. Entire marketing mix
Description : Primary data can be collected through all the four ways except – A. Observation B. Surveys C. Focus group D. Chatting E. Experiments
Last Answer : D. Chatting
Description : Which one of the following has a right to claim compensation for any loss due to mis statement in prospectus A. Purchasing shares in Primary Market B. Secondary Market C. Subscribers to memo. D. All the above
Last Answer : A. Purchasing shares in Primary Market
Description : Amino acids provide the nitrogen for the synthesis of (A) The bases of the phospholipids (B) Uric acid (C) Glycolipids (D) Chondroitin sulphates
Last Answer : Answer : A
Description : UDP Glucuronic acid is required for the biosynthesis of (A) Chondroitin sulphates (B) Glycogen (C) Lactose (D) Starch
Last Answer : A
Description : Zinc and sulphates deficiency in wheat field reported in
Last Answer : Ans.Punjab
Description : Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are (A) Carbonates (B) Sulphates (C) Silicates & phosphates (D) Bi-carbonates
Last Answer : (C) Silicates & phosphates
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 : Magnesium and calcium __________ cause temporary hardness of water. (A) Carbonates (B) Bicarbonates (C) Phosphates (D) Sulphates
Last Answer : (B) Bicarbonates
Description : Lime and soda ash are added to water to remove (A) Bicarbonates & sulphates of calcium and magnesium (B) Undesirable taste and odour (C) Bacteria (D) Its corrosiveness
Last Answer : (A) Bicarbonates & sulphates of calcium and magnesium
Description : __________ are used as corrosion inhibitor for iron & steel in aqueous solutions. (A) Phosphates (B) Chromates (C) Sulphates (D) Bi-carbonates
Last Answer : (B) Chromates
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 : The impurity of mixing water which affects the setting time and strength of concrete, is (A) Sodium sulphates (B) Sodium chlorides (C) Sodium carbonates and bicarbonates (D) Calcium bicarbonates
Last Answer : Answer: Option C
Description : Addition of pozzolana to ordinary port land cement, causes (A) Decrease in early strength (B) Reduction in chemical action with sulphates (C) Increase in shrinkage (D) All the above
Last Answer : Answer: Option D
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 : The maximum amount of chlorides and sulphates should not be more than [ A ] 0.15% and 4% by mass of cement respectively [ B ] 4% and 0.15% by mass of cement respectively [ C ] 0.30% and 2% by mass of cement respectively [ D ] 2% and 0.30% by mass of cement respectively
Last Answer : [ A ] 0.15% and 4% by mass of cement respectively
Description : Ozone is (A) A primary pollutant (B) A secondary pollutant (C) Impervious to ultra-violet rays (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : ________ content of the phosphate rock is the pollutant of primary interest in a phosphatic fertiliser plant. (A) Calcium (B) Fluorine (C) Phosphorous (D) Sulphur
Last Answer : (B) Fluorine
Description : Chlorofluorocarbon is used in A. Refrigerators B. Air conditioners C. Perfumes D. All
Last Answer : D. All
Description : Air pollution causes A. Global warming B. Respiratory problems C. Soil erosion D. None of these
Last Answer : B. Respiratory problems
Description : The Taj Mahal is being affected by A. Noise pollution B. Air pollution C. Water pollution D. None of these
Last Answer : B. Air pollution
Description : Highest percentage of air consists of A. Oxygen B. Carbon dioxide C. Nitrogen D. Argon
Last Answer : C. Nitrogen
Description : Which of the following is the leading cause of death and diseases worldwide? A. water pollution B. radioactive pollution C. air pollution D. soil pollution
Last Answer : A. water pollution
Description : The first of the major environmental protection act to be promulgated in India was: A. Water Act B. Air Act C. Environmental Act D. Noise Pollution Rule
Last Answer : A. Water Act
Description : Noise pollution has been inserted as pollution in the Air Act in: A. 1981 B. 1987 C. 1982 D. 2000
Last Answer : B. 1987