Description : Which metal gives violet colour in oxidising flame when heated with borax ?
Last Answer : Which metal gives violet colour in oxidising flame when heated with borax ? A. Fe B. Pb C. Co D. Mn
Description : Compound which is used as a fixer in pho- tographic film?
Last Answer : Sodium Thio sulphate or Thio
Description : The splitting of water (photolysis) in pho- tosynthesis occurs in which step?
Last Answer : Light reaction
Description : Best Pho in Seattle?
Last Answer : I don’t know about best, but I really like CyclePho on Broadway, Capitol Hill. My favorite dish there is #19.
Description : `CH_(3)Br+Nu^(-)rarrCH_(3)Nu+Br^(-)` The decreasing order of the rate of the above reaction with nucleophiles `(Nu^(-))` A to D is : `[Nu^(-)=(A)PhO^(
Last Answer : `CH_(3)Br+Nu^(-)rarrCH_(3)Nu+Br^(-)` The decreasing order of the rate of the above reaction with nucleophiles `(Nu ... B gt C gt D D. B gt D gt C gt A
Description : Which of the following can not evolve more than one gas (vapour) if heated in dry test tube.
Last Answer : Which of the following can not evolve more than one gas (vapour) if heated in dry test tube. A. `naNO_(3)(s)` B. ... D. `(NH_(4))_(2)Cr_(2)O_(7)(s)`
Description : What happens when carbon is heated with water vapour?
Last Answer : What is the answer ?
Description : The wet and 'dry bulb temperature for a vapour-gas mixture are 25°C and 30°C respectively. If the mixture is heated to 45°C at constant pressure, the wet bulb temperature will be __________ °C. (A) 25 (B) > 25 (C) < 25 (D) - 25
Last Answer : (B) > 25
Description : When an unsaturated air-water mixture is heated at constant pressure, then (A) The partial pressure of water vapour increases (B) The specific humidity decreases (C) The relative humidity increases (D) The relative humidity decreases
Last Answer : D) The relative humidity decreases
Description : A colorless salt gives violet colour to Bunsen flame and also turns moisture litmus paper blue. It is :
Last Answer : A colorless salt gives violet colour to Bunsen flame and also turns moisture litmus paper blue. It is : A. `Na_(2) ... C. `NaNO_(3)` D. `K_(2)CO_(3)`
Description : Alkali metal salt "X" gives a pale violet colour in flame test "X" is :
Last Answer : Alkali metal salt "X" gives a pale violet colour in flame test "X" is : A. NaCl B. LiCl C. KCl D. None of these
Description : A solution of sodium thiosulphate on addition of few drops of ferric chloride gives violet colour due to the formation of
Last Answer : A solution of sodium thiosulphate on addition of few drops of ferric chloride gives violet colour due to the formation of ... `Fe_(2)(S_(2)O_(3))_(2)`
Description : The substance used in the production of nylon; rayon; explosives; fertilizers and dyes?
Last Answer : Ammonia
Description : Where to get nice Tie-Dyes Shirts?
Last Answer : Just buy a new white t shirt. Tie it in knots, then wash it with a bright red sweatshirt, then throw it in the dryer, then untie the knots, retie some new knots, and wash it with a load of brand new, stiff blue jeans. Dry again. Pretty!
Description : Is it harmful to put dyes in your pool to make the color different?
Last Answer : I think it depends on what kind of dye you use. Keep in mind that whatever you dye the water with will probably dye you/your swimwear.
Description : How can I get some colour in my hair without resorting to dyes or extensions?
Last Answer : There are a ton of sites that google can point you towards. http://www.dreadlocks.org/how-to/ http://www.perfectdreadlocks.com/ http://www.mydreadlocks.com/index.html http://www.howtodread.com/ ... more complicated, go to a loctician - they specialize in dreadlocks. Or you could get yarn falls.
Description : do watermelons get injected with food coloring dye's to make the insides look redder quicker?
Last Answer : Need Answer
Description : Young zucchini turns yellow & dyes as it's growing.
Description : recently I was looking for one of the hair dye boxes but I couldn't find it ...
Last Answer : They have an expiration date, but are often not clearly indicated because a long series of numbers contains the date. Is there a number that you are wondering about the expiration date?
Description : What is a teenager dyes her hair purple in literature?
Last Answer : Need answer
Description : What are the most commonly used fluorescent dyes ?
Last Answer : The most commonly used fluorescent dyes are fluorescin or rhodamine. Both dyes can be conjugated to Fc region of antibody without affecting the specificity of the antigen.
Description : Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes (A) Fading of dyes on textiles (B) Corrosion, tarnishing & soiling of metals (C) Reduced strength of textiles (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Which dyes become linked to the fibre by chemical reaction? (a) Acid dyes (b) Direct dyes (c) Disperse dyes (d) None of these
Last Answer : Acid dyes
Description : The water-solubility of dyes can be increased by introducing (a) SO3Na groups (b) COOH groups (c) OH groups (d) All of these
Last Answer : All of these
Description : . Bromine is used in the preparation. of (A) Fire extinguishing compounds (B) Fire proofing agents (C) Dyes and antiknock compounds (D) All (A), (B) and (C)
Description : Fluorescent dyes are added in detergents to (A) Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics (B) Attain distinctiveness ... brands (C) Act as tarnish inhibitor for metals like German silver (D) None of these
Last Answer : (A) Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics
Description : Pick out the wrong statement. (A) Azoic dyes are mostly applied on cotton fabrics (B) Basic dyes (e.g. amino derivatives) are applied mostly to paper (C) Mordant dyes are applied mainly to wools (D) None of these
Last Answer : (D) None of these
Description : Intestinal bacteria can grow in the presence of __________whereas nonintestinal bacteria are A.bile salts B.low concentration of various dyes C.sugars D.low levels of nitrogen
Last Answer : A.bile salts
Description : Type of lasers that use organic dyes enclosed in glass tube for an active medium. ∙ A. liquid lasers ∙ B. plasma lasers ∙ C. neon lasers ∙ D. ruby lasers
Last Answer : liquid lasers
Description : n a chemical factory where dyes are made, wet cake at 30 OC consisting of 60% moisture is put in a dryer to obtain an output having only 5% moisture, at atmospheric pressure. In each batch about 120 ... dryer and the dryer efficiency is 80%. Latent heat of steam at 4 kg/cm2 is 520 kcal/kg.
Last Answer : Given that Qty of material dried per batch - 120 Kgs Moisture at inlet - 60% a. The quantity of moisture removed per batch. Water quantity in a wet batch - 120 x 0.6 = 72 Kgs. Quantity of bone dry ... - 48/0.95 = 50.5 Kgs. Equivalent water in a dry batch - 50.5 - 48 = 2.5 Kgs.
Description : ____ dissolve in water and are made as powders, granules (small hard pieces), liquids, or other specialpurpose forms. a. Dyes c. Sweeteners b. Lakes d. Gums
Last Answer : a. Dyes
Description : How are prescription medicines different from OTC ones? A. They contain much smaller amounts of active ingredients B. They don't contain dyes or preservatives C. They're unsafe for use without medical supervision D. They can be toxic
Last Answer : C. They're unsafe for use without medical supervision
Description : Radioisotopes which are used in medical diagnosis are known as what? w) tracers x) silver bullets y) markers z) dyes
Last Answer : ANSWER: W -- TRACERS
Description : What is the difference between a sodium vapour lamp, Which gives out a yellowish colour illumination, and a mercury vapour lamp that gives out a white colour illumination?
Last Answer : Answer I: The light in Sodium Vapour lamp is from an atomic emission process whereas in Mercury Vapour Lamp it is, finally, from fluorescence emission. The mechanism of light emission in a sodium ... from a fluorescent lamp is moderate (60 lumens/watt) while the color-rendering index is high.
Description : Clausius-Clapeyron Equation gives accurate result, when the (A) Vapour pressure is relatively low and the temperature does not vary over wide limits (B) Vapour obeys the ideal gas law and the latent heat of ... is negligible compared with that in the vapour state (D) All (A), (B) and (C)
Description : Pick out the correct statement about the condensation. (A) Filmwise condensation gives a lower heat transfer rate than the dropwise condensation (B) Suitable coating or vapour additive is used to promote film ... place on it (D) Reynolds number of condensing liquid is based on its mass flow rate
Last Answer : (B) Suitable coating or vapour additive is used to promote film wise condensation
Description : In the blast furnace, incorporation of water vapour in the blast gives the following effect. (A) Increases the reducing potential of the gas (B) Increases the flame temperature (C) No significant change occurs (D) Increases the hydrogen content in the metal
Last Answer : (A) Increases the reducing potential of the gas
Description : Sodium phenoxide when heated with `CO_(2)` under pressure at `125^(@) C` yield a product which on acetylation gives product `C`
Last Answer : Sodium phenoxide when heated with `CO_(2)` under pressure at `125^(@) C` yield a product which on acetylation gives product `C` A. B. C. D.
Description : Acetic acid when heated `(300^(@)C)` with MnO gives
Last Answer : Acetic acid when heated `(300^(@)C)` with MnO gives A. formaldehyde B. acetaldehyde C. acetone D. butanone
Last Answer : Sodium phenoxide when heated with `CO_(2)` under pressure at `125^(@) C` yield a ... B. salicyladehyde C. sodium benzoate D. sodium salicylate
Description : When aniline is heated with glycerol in the presence of sulfuric acid and nitrobenzene, it gives quinoline. This reaction in called (a) Fischer synthesis (b) Skraup synthesis (c) Diazotization (d) Corey-House synthesis
Last Answer : Skraup synthesis
Description : When benzaldehyde is heated with concentrated NaOH, it gives : (a) Benzyl alcohol (b) Sodium benzoate (c) Benzoic acid (d) Benzyl alcohol + Sodium benzoate
Last Answer : Benzyl alcohol + Sodium benzoate
Description : When glycerol is heated with oxalic acid at 260°C, it gives (a) 1,2-Propanediol (b) Vinyl alcohol (c) 1,3-Propanediol (d) Allyl alcohol
Last Answer : Allyl alcohol
Description : When chloroform is heated with aqueous NaOH, it gives (a) Formic acid (b) Sodium formate (c) Acetic acid (d) Sodium acetate
Last Answer : Sodium formate
Description : The element that sublimes (solid into vapour) on heating?
Last Answer : Iodine
Description : what do you do when the blooms of an african violet die off?
Last Answer : the plant can stay alive forever if it is watered, fed, and fertilized. It should be in a nice south facing window where it gets bright daylight. Feed it per the directions on the container of ... you should have new flowers within a couple of weeks as long as the plant is getting enough light.
Description : Is vapour an element?
Last Answer : No
Description : An element which has a definite volume and shape is called: a) Liquid b) Solid c) Gas d) Vapour
Last Answer : b) Solid
Description : Give reasons for the following observations: (a) The element carbon forms a very large number of compounds. (b) Air holes of a gas burner have to be adjusted when the heated vessels get blackened by the flame. (c) Use of synthetic detergents causes pollution of water. -Chemistry
Last Answer : Answer. (a) Carbon forms large number of compounds since carbon is small in size and can form stable covalent bonds (catenation) and it shows tetravalency. (b) Air holes of gas burner are ... not get blackened. (c) Some synthetic detergents are non-biodegradable, therefore, cause pollution of water.