Both white phosphorous as well as red phosphorous
(A) Are soluble in CS2
(B) Burns when heated in air
(C) Reacts with hot caustic soda solution to give Phosphine
(D) All (A), (B), and (C)

1 Answer

Answer :

(B) Burns when heated in air

Related questions

Description : What does mixture of CS2 and H2S on passing over heated copper give?

Last Answer : Methane

Description : What does mixture of CS2 and H2S on passing over heated copper give?

Last Answer : Methane

Description : Nickel made/clad equipments are suitable for handling (A) Ammonia (both aqueous & anhydrous) (B) Fruit juices, milk & its products and caustic soda solution (C) Nitric acid & hydrochloric acid (concentrated) (D) Sulphuric acid (concentrated)

Last Answer : (B) Fruit juices, milk & its products and caustic soda solution

Description : The doctor's solution comprises of sodium plumbite in (A) Alcohol (B) Water (C) Aqueous caustic soda (D) Soda ash

Last Answer : (C) Aqueous caustic soda

Description : An ideal material of construction for the storage of 50% caustic soda solution would be (A) Karbate (B) High silicon cast iron (C) Monel (D) None of these

Last Answer : (C) Monel

Description : Platinum and silver are corroded by (A) Caustic soda solution (B) Phosphoric acid (C) Sulphuric acid (10%) (D) None of these

Last Answer : (D) None of these

Description : In Kraft process of paper manufacture, white cooking liquor consists of caustic soda (A) Sodium sulphide & sodium carbonate (B) Sodium sulphite & sodium carbonate (C) Sodium sulphite & sodium sulphide (D) None of these

Last Answer : (A) Sodium sulphide & sodium carbonate

Description : White phosphorous burns in atmosphere at?

Last Answer : 30°C

Description : Which color precipitates when caustic soda solution is added to iron salt solution ?

Last Answer : Reddish brown precipitates .

Description : Mud balls may be removed by (A) Breaking and washing (B) Washing the filter with a solution of caustic soda (C) Removing, cleaning and replacing the damaged sand (D) All the above

Last Answer : (D) All the above

Description : 20 gram of caustic soda are dissolved in water to prepare 500 ml of solution. Find the normality and molarity of solution.

Last Answer : Basis: 500 ml solution. Weight of solute = 20 gm Molecular weight of NaOH = 40 Gram moles of solute = 20/40 = 0.5 Molarity = Gram moles/ Volume of solution in lit  0.5/0.5 = 1 M Normality = gram equivalent of solute/ volume of solution in lit  = 0.5/0.5 = 1N 

Description : Coffee is prepared from coffee beans by leaching with (A) Cold water (B) Hot water (C) Dilute hot caustic solution (D) Naphtha

Last Answer : (B) Hot water

Description : When Bauxite is heated with NaOH solution, the water soluble compound formed is

Last Answer : When Bauxite is heated with NaOH solution, the water soluble compound formed is A. `NaAlO_(2)` B. `Na_(3)AlO_(3)` C. `Al(OH)_(3)` D. `Al_(2)O_(3)`

Description : Which of the following non-metal reacts and catches fire on exposure to air? a) phosphorous b)nitrogen c)sulphur d)hydrogen

Last Answer : a) phosphorous

Description : Complete removal of __________ from gasoline is done by Unisol process using caustic soda and methyl alcohol. (A) Waxes (B) Mercaptans (C) Asphalt (D) Diolefins

Last Answer : (B) Mercaptans

Description : Wood metal is not used for making (A) Soft solder (B) Casting for dental work (C) Storage tank for storing brine and caustic soda (D) Fusible safety plug for pressure cooke

Last Answer : (C) Storage tank for storing brine and caustic soda

Description : Evaporators used in caustic soda recovery and production plant are made of (A) Monel metal (B) Gun metal (C) Wood metal (D) Babbitt metal

Last Answer : (A) Monel metal

Description : Rubber lined pumps can be used to pump (A) Caustic soda (B) Chlorinated brine (C) Hypochlorous acid (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Description : Caustic soda can be stored in __________ drums. (A) Steel (B) Cast iron (C) Brass (D) Gun metal

Last Answer : (A) Steel

Description : Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and (A) Moving mercury and graphite (B) Graphite and moving mercury (C) Moving mercury and carbon (D) Moving mercury and crimped steel wire

Last Answer : (B) Graphite and moving mercury

Description : Caustic soda is transported in __________ lined containers. (A) Glass (B) Nickel (C) Neoprene (D) Either (B) or (C)

Last Answer : (D) Either (B) or (C)

Description : A multiple effect evaporator has a capacity to process 4000 kg of solid caustic soda per day, when it is concentrating from 10% to 25% solids. The water evaporated in kg per day is (A) 6000 (B) 24000 (C) 60000 (D) 48000

Last Answer : (B) 24000

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 : Le-Blanc process is a primitive process for the manufacture of (A) Caustic soda (B) Soda ash (C) Bromine from sea water (D) Hydrochloric acid

Last Answer : (B) Soda ash

Description : Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an (A) Explosive (B) Soap (C) Detergent (D) Analgesic drug

Last Answer : (C) Detergent

Description : Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine? (A) Na2CO3 (B) NaHCO3 (C) H2 (D) None of these

Last Answer : (C) H2

Description : Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc? (A) Sodium silicate (B) Sodium borate (C) Sodium tripolyphosphate (STPP) (D) Caustic soda

Last Answer : (B) Sodium borate

Description : Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda? (A) Diaphragm electrolytic cell process (B) Mercury electrolytic cell process (C) Lime-soda process (D) None of these

Last Answer : (C) Lime-soda process

Description : Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda? (A) High cost of mercury (B) High specific gravity of mercury (C) Non-availability of high purity mercury (D) Pollution of water stream by mercury

Last Answer : (D) Pollution of water stream by mercury

Description : Mercury cells for caustic soda manufacture, compared to diaphragm cells (A) Require lower initial investment (B) Require more power (C) Produce lower concentration NaOH (D) None of these

Last Answer : (D) None of these

Description : Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it (A) Has larger production capacity per unit cell (B) Consumes less power per ton of Cl2 produced (C) Produces high purity (70%) caustic soda directly (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Description : Solvay process is used for the manufacture of (A) Caustic soda (B) Soda ash (C) Caustic potash (D) Soda lime

Last Answer : (B) Soda ash

Description : Salt is the basic raw material for the manufacture of (A) Cement (B) Glass (C) Potteries (D) Caustic soda

Last Answer : (D) Caustic soda

Description : Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials. (A) Coke and sand (B) Brine and coal (C) Coke and caustic soda (D) None of these

Last Answer : (B) Brine and coal

Description : Which of the following statements is False about acetamide? (a) reacts with Br2/NaOH to form tertiary amine (b) undergoes acid-hydrolysis to form acetic acid (c) undergoes dehydration with P2O5 to form a nitrile (d) is a white crystalline solid, soluble in water

Last Answer : reacts with Br2/NaOH to form tertiary amine

Description : Pick out the wrong statement. (A) All the nitrogenous fertilisers are not soluble in water (B) A straight fertiliser contains only one nutrient (C) Calcium cyanamide is used as weed killer in onion fields (D) The phosphorous nutrient makes the plant stem stronger and increases its branches

Last Answer : (A) All the nitrogenous fertilisers are not soluble in water

Description : A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous. (A) Salt & coke (B) Sand & coke (C) And coke (D) And sand

Last Answer : (B) Sand & coke

Description : What is the use of caustic soda ?

Last Answer : Use of Caustic Soda Caustic soda is used in the production of soap and paper , artificial silk and sodium metals. Used in petroleum cleaning and rubber recovery. Used as a reagent in the laboratory. ... etc. Caustic soda is used in refining and recycling of aluminum ore. Used in the paper industry.

Description : What is Caustic Soda ?

Last Answer : Caustic soda is sodium hydroxide ( NaOH) . It is an inorganic compound. It is a white solid. It is available in the market in pellet , flake , granular and liquid concentrations of different concentrations.

Last Answer : Caustic soda signal NaOH.

Last Answer : Sodium To hydroxide Caustic Soda Says The signal is NaOH ( sodium ) Hydroxide ), it Extremely Corrosive, Dangerous.

Description : What happens when caustic soda is added to vinegar?

Last Answer : Caustic soda is sodium hydroxide (NaOH), which is a strong base. Vinegar, a weak acid, is dilute acetic acid (CH3COOH). When combined, they undergo a neutralization reaction producing water and the salt sodium ... chemical equation is written below.NaOH(aq) + CH3COOH(aq) --> H2O(l) + NaCH3COO(aq)

Description : Is caustic soda flakes are a pure substances or mixture?

Last Answer : What is the answer ?

Description : Permanent hardness of water cannot be removed by (a) Boiling (b) Adding caustic soda (c) Distillation (d) Adding soda

Last Answer : Ans:(a)

Description : Saponification involves the hydrolysis of fats and oils by- (1) water (2) washing soda (3) stearic acid (4) caustic soda

Last Answer : (4) caustic soda Explanation: Caustic soda (sodium hydroxide) is a versatile alkali. Its main uses are in the manufacture of pulp and paper, alumina, soap and detergents, petroleum products and chemical production.

Description : Sodium Carbonate is commonly known as - (1) Baking Soda (2) Washing Soda (3) Caustic Soda (4) Caustic Potash

Last Answer : (2) Washing Soda Explanation: Sodium carbonate (Na2CO3) is also known as washing soda, soda ash and soda crystals. It is a salt of carbonic acid, a chemical that produces a wide range of salts collectively known as carbonates. It can be used to remove stubborn stains from laundry.

Description : The contact process is involved in the manufacture of - (1) Nitric acid (2) Sulphuric acid (3) Ammonia (4) Caustic soda

Last Answer : (2) Sulphuric acid Explanation: It is also a central substance in the chemical industry. It is widely produced by contact process. Now days, sulphuric acid is prepared by contact process all over ... process is based upon the catalytic oxidation of sulfur dioxide (SO2) to sulfur trioxide (SO3).

Description : Acetic acid is know as - (1) Caustic soda (2) Spirit (3) Baking soda (4) Vinegar

Last Answer : (4) Vinegar Explanation: Acetic acid (CH3COOH) also called ethanoic acid, the most important of the carboxylic acids. Vinegar is roughly 3-9% acetic acid by volume making acetic acid the main component of vinegar apart from water.

Description : Sodium bicarbonate is commercially known as – (1) Washing soda (2) Baking soda (3) Caustic soda (4) Soda lime

Last Answer : (2) Baking soda Explanation: Baking Soda is Sodium bicarbonate or sodium hydrogen carbonate. It is primarily used in cooking (baking), as a leavening agent. It reacts with acidic components in batters, ... and grain in pancakes, cakes, quick breads, soda bread, and other baked and fried foods.

Description : The common name for the com-pound having formal NaOH is – (1) Caustic soda (2) Caustic potash (3) Soda ash (4) Sodium hydroxide

Last Answer : (1) Caustic soda Explanation: Sodium hydroxide, also known as lye or caustic soda, has the molecular formula NaOH and is a highly caustic metallic base. It is a white solid available in pellets ... manufacture of pulp and paper, textiles, drinking water, soaps and detergents and as a drain cleaner.