Description : Anion exchanger is regenerated usually with (A) NaOH (B) H2SO4 (C) Hydrazine (D) Alum solution
Last Answer : (A) NaOH
Description : The most commonly used chemical coagulant in water treatment is (A) Ferrous sulphate (B) Alum (C) Lime (D) Hydrazine
Last Answer : (B) Alum
Description : Zeolite used in water softening process (cation exchange) is regenerated by washing with (A) Brine (B) Chloramines (C) Sodium bisulphite (D) Liquid chlorines
Last Answer : (A) Brine
Description : A solution containing 2.675 g of `CoCl_(3).6NH_(3)` (molar mass `= 267.5 g mol^(-1)`) is passed through a cation exchanger. The chloride ions obtained
Last Answer : A solution containing 2.675 g of `CoCl_(3).6NH_(3)` (molar mass `= 267.5 g mol^(-1)`) is passed through a ... _(3)]` D. `[CoCl(NH_(3))_(5)]Cl_(2)`
Description : Acetone undergoes reduction with hydrazine in the presence of NaOH to form propane. This reaction is known as (a) Clemmensen reduction (b) Wolf-Kishner reduction (c) Rosenmund reduction (d) Reformatsky reaction
Last Answer : Wolf-Kishner reduction
Description : Permanent hardness of water can be removed by (A) Simply boiling (B) Adding alum (C) Passing it through cation & anion exchangers (D) All (A), (B) and (C)
Last Answer : (C) Passing it through cation & anion exchangers
Description : Polyvinyl alcohol is used as a (A) Cation/anion exchanger (B) Water soluble adhesive (C) Textile fibre (D) Non-sticky coating on frying pans
Last Answer : (B) Water soluble adhesive
Description : Which of the following is the most widely used disinfectant in water treatment? (A) Chlorine (B) Irradiation of water by ultraviolet light (C) Cation exchanger (D) Coagulation
Last Answer : (A) Chlorine
Description : 1 g of complex `[Cr(H_(2)O)_(5)Cl]Cl_(2).H_(2)O` was passed through a cation exchanger to produce HCl. The acid liberated was diluted to 1 litre. What
Last Answer : 1 g of complex `[Cr(H_(2)O)_(5)Cl]Cl_(2).H_(2)O` was passed through a cation ... molarity of acid solution [Molecular weight of complex=266.5]?
Description : Viscose rayon (A) Cannot be made from sulphite pulp (B) Utilises H2SO4 , NaOH and CS2 during its manufacture (C) Cannot yield textile grade fibre (D) None of these
Last Answer : (B) Utilises H2SO4 , NaOH and CS2 during its manufacture
Description : In the Bayer's process, bauxite is digested under pressure using (A) H2SO4 (B) NaOH (C) NH3 (D) HCl
Last Answer : (B) NaOH
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 : Study the following table and choose the correct option: Salt - Parent Acid - Parent Base - Nature of Salt (a) Soidum Chloride - HCI - NaOH - Basic (b) Sodium Carbonate - H2CO3 - NaOH - Neutral (c) Sodium Sulphate - H2SO4 - NaOH - Acidic (d) Sodium Acetate - CH3COOH - NaOH - Basic
Last Answer : Answer: (d) Sodium Acetate - CH3COOH - NaOH - Basic
Description : Oil of Wintergreen (Methyl salicylate) is obtained by treating salicylic acid with (a) Methane at 150°C (b) CH3OH and conc. H2SO4 (c) Methyl chloride (d) NaOH and then CH3OH
Last Answer : CH3OH and conc. H2SO4
Description : Isopropyl alcohol can be converted to acetone by treatment with (a) HCl/ZnCl2 (b) Na2Cr2O7/H2SO4 (c) NaOH (d) LiAlH4
Last Answer : Na2Cr2O7/H2SO4
Description : Hydrazine `N_(2)H_(4)` acts as a reducing agent. To prepare 100 ml of 2 N hydrazine solution, the weight required will be
Last Answer : Hydrazine `N_(2)H_(4)` acts as a reducing agent. To prepare 100 ml of 2 N hydrazine solution, the weight required will ... B. 1.6 g C. 3.2 g D. 0.8 g
Description : Viscose rayon is (A) Cellulose nitrate (B) Regenerated cellulose nitrate (C) Regenerated cellulose acetate (D) None of these
Last Answer : (D) None of these
Description : Celluloid is (A) Cellulose acetate (B) Regenerated cellulose (C) Cellulose nitrate (D) Cellulose acetate butyrat
Last Answer : (C) Cellulose nitrate
Description : Molecular sieves are regenerated by heating to __________ °C. (A) < 150 (B) 200-330 (C) > 500 (D) > 1000
Last Answer : (B) 200-330
Description : Viscose rayon is chemically (A) Cellulose nitrate (B) Regenerated cellulose nitrate (C) Cellulose acetate (D) Regenerated cellulose acetate
Last Answer : (D) Regenerated cellulose acetate
Description : Celluloid is chemically (A) Cellulose acetate (B) Regenerated cellulose (C) Cellulose nitrate (D) Cellulose acetate butyrate
Description : Corrosion in boilers can be prevented by (A) Deaeration of feed water (B) Enhancing pH of feed water by adding alkali (C) Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Hydrazine is largely used (A) As a starting material for 'hypo' (B) In photographic industry (C) As rocket fuel (D) In printing industry
Last Answer : (C) As rocket fuel
Description : Main use of hydrazine is (A) As a rocket fuel (B) In water treatment (C) As a disinfectant (D) As fire retardant
Last Answer : (A) As a rocket fuel
Description : Hydrazine (N2H4 ) is used mainly as a/an (A) Explosive (B) Rocket fuel (C) Detergents additive (D) None of these
Last Answer : (B) Rocket fuel
Description : Hydrazine is used in water treatment for the removal of (A) Colloidal impurities (B) Dissolved oxygen (C) Turbidity (D) Chlorinous taste
Last Answer : (B) Dissolved oxygen
Description : The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the (A) Water alkalinity & leakage (B) Hydrazine addition during ... treatment (C) Release of non-condensable gas from water in the boiler (D) Scale formation
Last Answer : (C) Release of non-condensable gas from water in the boiler
Description : Lead pipe is (A) Especially resistant to solutions containing H2SO4 (B) Usually joined by burning (e.g. by melting to adjacent pieces with a torch) (C) Having very low elastic limit resulting in permanent deformation from either mechanical or thermal strain (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C
Description : To control the growth of algae in reservoirs, the compound which is used, is (A) Bleaching powder (B) Copper sulphate (C) Lime solution (D) Alum solution
Last Answer : (B) Copper sulphate
Description : Flushing liquor used for cooling coke oven gas constitutes of (A) Ammoniacal liquor (B) K2CO3 solution (C) Dilute H2SO4 (D) Dilute HCl
Last Answer : (A) Ammoniacal liquor
Description : A selectable marker is used to (a) help in eliminating the non-transformants, so that the transformants can be regenerated (b) identify the gene for a desired trait in an alien organism (c) ... in a specific crop (d) mark a gene on a chromosome for isolation using restriction enzyme.
Last Answer : (a) help in eliminating the non-transformants, so that the transformants can be regenerated
Description : Rhodopsin: a. is a red pigment b. is least sensitive to red light c. is regenerated when the eyes are closed d. all above
Last Answer : all above
Description : `25ml` of a `0.1(M)` solution of a stable cation of transition metal `z` reacts exactly with `25 ml` of `0.04(M)` acidified `KMnO_(4)` solution. Which
Last Answer : `25ml` of a `0.1(M)` solution of a stable cation of transition metal `z` reacts exactly with `25 ml` of `0.04 ... 3+)rarrZ^(4+)` D. `Z^(2+)rarrZ^(4+)`
Description : When any solution passess through a cation exchange resin that is in acidic form, H ion of the resin is replaced by cations of the solution. A solutio
Last Answer : When any solution passess through a cation exchange resin that is in acidic form, H ion ... D. tetraaquadichloro chromium (III) chloride dihydrate.
Description : A process stream of dilute aqueous solution flowing at the rate of10 Kg.s -1 is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s -1 . A 1 ... side (C) Parallel flow with process stream on shell side (D) Parallel flow with process stream on tube side
Last Answer : (A) Counter flow with process stream on shell side
Description : What happens when urea is treated with hydrazine? (a) Biuret is formed (b) Semicarbazide is formed (c) Carbon dioxide and nitrogen is formed (d) Acetamide is formed
Last Answer : Semicarbazide is formed
Description : A hydrazone will result from the reaction of hydrazine with (a) a phenol (b) an aldehyde (c) an alcohol (d) an acid
Last Answer : an aldehyde
Description : Which of the following is the most suitable material of construction for evaporator & its tubes for concentrating NaOH solution to 70%? (A) Cast iron (B) Steel (C) Nickel (D) Karbate
Last Answer : (C) Nickel
Description : The overall mass transfer co-efficient for the absorption of SO2 in air with dilute NaOH solution can be increased substantially by (A) Increasing the gas film co-efficient (B) Increasing the liquid film co-efficient (C) Increasing the total pressure (D) Decreasing the total pressure
Last Answer : (A) Increasing the gas film co-efficient
Description : Boiling point elevation of a solution of NaOH (A) Increases rapidly with temperature rise (B) Is almost independent of temperature (C) Is almost independent of pressure (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : Diaphragm electrolytic cell as compared to mercury electrolytic cell (A) Produces 70% NaOH solution (B) Requires less specific power consumption for the production of chlorine (C) Requires lesser investment for similar capacity (D) All (A), (B) and (C)
Last Answer : (C) Requires lesser investment for similar capacity
Description : Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent. (A) 10 (B) 25 (C) 50 (D) 98
Last Answer : (C) 50
Description : Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C. (A) 25 (B) 60-70 (C) 150-200 (D) 250-300
Last Answer : (B) 60-70
Description : What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell? (A) Cl2 & Na (B) Cl2 & H2 (C) O2 & H2 (D) Cl2 , H2 & NaOH solution
Last Answer : (D) Cl2 , H2 & NaOH solution
Description : Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent. (A) 10 (B) 25 (C) 50 (D) 98
Last Answer : (A) 10
Description : A waste heat recovery unit (WHRU) is an_________ that transfers heat from process outputs at high temperature to another part of the process for some purpose, usually increased efficiency. a) Energy recovery heat exchanger b) Energy recovery heat diffuser c) Both ‘a’ and ‘b’ d) None of the above
Last Answer : Energy recovery heat exchanger
Description : Which of the following statements is false about toluene? (a) can be prepared by treating benzene with methyl chloride in the presence of AlCl3. (b) is converted to benzoic acid on refluxing with ... (d) can be nitrated with concentrated nitric acid to give a mixture of ortho and meta nitrotoluene.
Last Answer : can be nitrated with concentrated nitric acid to give a mixture of ortho and meta nitrotoluene
Description : A compound, C4H6, reacts with bromine and forms a white precipitate with ammoniacal silver nitrate solution. It reacts with dilute H2SO4 in the presence of mercuric sulfate to form 2-butanone. The compound could be (a) 1-Butyne (b) 1-Butene (c) 2-Butyne (d) 2-Butene
Last Answer : 1-Butyne
Description : The molecular weight of H2SO4 is 98. How many grams of H2SO4 are contained in 1 liter of a 1 Normal solution?
Last Answer : ANSWER: 49 grams of H2SO4