Description : Number of hydroxyl groups present in hydorxyl groups present in pyrosulphuric acid is
Last Answer : Number of hydroxyl groups present in hydorxyl groups present in pyrosulphuric acid is A. 3 B. 4 C. 2 D. 1
Description : Is Acid rain dissolving paint off a wall a chemical change or physical change?
Last Answer : Chemical change
Description : The process of dissolving an acid or a base in water is a highly - (1) Exothermic reaction (2) Endothermic reaction (3) Sublimation reaction (4) Redux reaction
Last Answer : (1) Exothermic reaction Explanation: The process of dissolving an acid or a base in water is a highly exothermic one. This is why care must be taken while mixing concentrated nitric acid or sulphuric acid with water.
Description : Uranium is recovered from its ore (pitchblende) by (A) Froth floatation technique (B) Leaching with sulphuric acid (C) Smelting in a furnace (D) Dissolving in water
Last Answer : (B) Leaching with sulphuric acid
Description : How N-acetyl neuraminic acid (sialic acid) is synthesised?
Last Answer : N-acetyl mannosamine-6-phosphate + phospho enol pyruvate.
Description : Which amino acid is synthesised after it gets in- corporated into the protein?
Last Answer : Hydroxyproline
Description : Which of the following amino acids was not found to be synthesised in Miller’s experiment? (a) Alanine (b) Glycine (c) Aspartic acid (d) Glutamic acid (
Last Answer : (d) Glutamic acid
Description : Which statement is wrong for Krebs' cycle? (a) There is one point in the cycle where FAD+ is reduced to FADH2. (b) During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised. (c ... citric acid. (d) There are three points in the cycle where NAD+ is reduced to NADH + H+.
Last Answer : (c) The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid.
Description : Amino acids are mostly synthesised from (a) mineral salts (b) fatty acids (c) volatile acids (d) α-ketoglutaric acid.
Last Answer : (d) α-ketoglutaric acid.
Description : The first organic compound synthesised in the laboratory was (1) Urea (2) Uric acid (3) Lactic acid (4) Glucose
Last Answer : Urea
Description : How does dissolving a salt molecule in water make its atoms ionize? -Space
Last Answer : When salt is mixed with water, the salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules. Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together.
Description : After dissolving 0.25 kg of salt in 1 kg of water, its volume becomes 1200 cc. What is the concentration of solution ?
Last Answer : We know , 1 cc = 1cm ^ 3 = (10 ^ -6) m ^ 3 Density of salt water = (1 + 0.25) / (1200 × 10 ^ - ৬) = 1.04 kg / (m 3)
Description : What is the change in dissolving sugar in water ?
Last Answer : The physical change of dissolving sugar in water.
Description : What is produced by dissolving salt in water ?
Last Answer : When salt is dissolved in water, solution is produced.
Description : Sperms produce an enzymatic substance or lysin for dissolving egg coverings. It is called
Last Answer : Sperms produce an enzymatic substance or lysin for dissolving egg coverings. It is called A. ... B. hyaluronidase C. Androgamone D. Diastase.
Description : Assertion : Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by a more electropositive metal. Reason : Copp
Last Answer : Assertion : Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation ... : Copper is extracted by hydrometallurgy.
Description : What are three way of speeding up dissolving?
Last Answer : firstly Temperature, size of pieces, and stirring
Description : What is the molality of a solution made by dissolving 6 moles of Noah in 3 kg of water?
Last Answer : Feel Free to Answer
Description : When Salt dissolving water physical change or chemical change?
Last Answer : It is a physical change because the chemical composition of saltand water do not change. You can separate the salt and waterphysically by allowing the water to evaporate, which leaves thesalt.
Description : How can you speed uo the dissolving process when preparing juice from frozen concentrate?
Description : What is the molar mass of haemocyanin and the freezing point of the solution when an aqueous solution is prepared by dissolving 1.5 grams of haemocyanin a protein obtained from crabs in 0.25 litres of?
Last Answer : Haemocyanins are a group of proteins.
Description : What is the molarity of a solution made by dissolving 6 moles of naoh in 3 kg?
Last Answer : Need answer
Description : Is salt the slowest dissolving powder?
Description : What are the citizens of Louisiana dissolving themselves of?
Last Answer : h
Description : Is dissolving sugar & water reversible or irreversible?
Last Answer : ,irrrversible
Description : The solution made by dissolving Salt (NaOH) in water is called as
Last Answer : Ans. Brine solution
Description : Detergents dissolved in water help in cleaning clothes by A. Increasing the temperature of water B. Reacting chemically with dirt C. Reducing the surface tension of water D. Dissolving dirt
Last Answer : ANSWER: C
Description : Which of the following is not related to the powers of the Governor? (1) Diplomatic and military powers (2) Power to appoint Advocate General (3) Summoning, proroguing and dissolving State Legislature (4) Power to grant pardons, reprieves, respites or remission of punishments
Last Answer : (1) Diplomatic and military powers Explanation: Diplomatic and military powers is related to the powers of the President. It is not the power of Governor.
Description : Pick out the wrong statement regarding the solubility characteristics of high polymers. (A) Greater the degree of cross-linking in the polymer, lesser is its solubility (B) Polymers having more ... of the solvent (D) High molecular weight polymers on dissolving gives solution of very low viscosity
Last Answer : (D) High molecular weight polymers on dissolving gives solution of very low viscosity
Description : Furfural solvent extraction is used for upgrading (by dissolving aromatics) (A) Naphtha (B) Lubricating oils (C) Wax (D) Cracking feedstock
Last Answer : (B) Lubricating oils
Description : Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is (A) Added to the feed slurry (B) Pre ... the cake by dissolving solids or by burning it off (D) All 'a', 'b' & 'c'
Last Answer : (D) All 'a', 'b' & 'c'
Description : Which of the following operations does not involve leaching? (A) Dissolving gold from ores (B) Dissolving pharmaceutical products from bark or roots (C) Dissolving sugar from the cells of the beet (D) Removing nicotine from its water solution by kerosene
Last Answer : (D) Removing nicotine from its water solution by kerosene
Description : The mass transfer co-efficient for a solid sphere of radius 'a' dissolving in a large volume of quiescent liquid, in which ‘D’ is the diffusivity of solute, is (A) D/a (B) D/2a (C) Proportional to √D (D) Dependent on the Reynolds number
Last Answer : (D) Dependent on the Reynolds number
Description : Detergents dissolved in water help in cleaning clothes by-----? A. Increasing the temperature of water B. Reacting chemically with dirt C. Reducing the surface tension of water (Answer) D. Dissolving dirt
Last Answer : C. Reducing the surface tension of water (Answer)
Description : While dissolving a gas into a liquid at a constant temperature, the ratio of the concentration of the gas in the solution phase and in the gaseous phase is (A) Infinity (B) Unity (C) Constant (D) Negative
Last Answer : (C) Constant
Description : Pick up the correct statement from the following: (A) Lime is available in Free State (B) Lime is available by dissolving calcium carbonate in water (C) Lime is available by calcining calcium carbonate at 900°C (D) Lime is nothing but calcium chloride
Last Answer : Answer: Option C
Description : 9.Acrosome is important for ----------- . a)ATP production, b)Dissolving membrane of ovum, c)Motility of sperm, d)Nutrition of sperm
Last Answer : b)Dissolving membrane of ovum,
Description : An aqueous solution of sodium chloride is prepared by dissolving 10kg of sodium chloride in 50 kg of water find (i) Weight % (ii) Mole % of solution. [Atomic weight of Na = 23, Cl = 35.5]
Last Answer : Weight of NaCl = 10 kg Weight of H2O = 50 kg Total weight = 60 kg Weight % of NaCl = (10/ 60) * 100 =16.67% Weight % of H2O = (50/ 60) * 100 = 83.33% Molecular weight of NaCl = 58.5 k moles of NaCl ... 100 = 5.79% Mol % of H2O = (moles of H2O / Total moles)*100 = (2.78/ 2.949)*100 = 94.26%
Description : The formation of pockets of gas in a liquid is called: w) absorption x) cavitation y) adsorption z) dissolving
Last Answer : ANSWER: X -- CAVITATION
Description : What is the molarity of a salt solution prepared b dissolving three moles of salt in 500 milliliters of water? w) 1 x) 2 y) 4 z) 6
Last Answer : ANSWER: Z -- 6
Description : A negative heat of solution indicates that: w) an endothermic dissolving process occurs x) solute solubility increases with rising solution temperature y) solute solubility decreases with rising solution temperature z) super-saturation conditions exist
Last Answer : ANSWER: Y -- SOLUTE SOLUBILITY DECREASES WITH RISING SOLUTION TEMPERATURE
Description : What is the molality of a salt solution prepared by dissolving two moles of salt in 500 grams of water?
Last Answer : ANSWER: 4
Description : Which vitamin is synthesised in the body by intestinal bacteria? -Do You Know?
Last Answer : answer:
Description : Prothrombin , albumin and fibrinogen are synthesised by
Last Answer : Prothrombin , albumin and fibrinogen are synthesised by A. Pancreas B. Bone marrow C. Spleen D. Liver
Description : During chemical evolution, key biological compounds were synthesised
Last Answer : During chemical evolution, key biological compounds were synthesised A. in the atomosphere B. along the ocean ... . in the ocean D. none of the above
Description : In eukaryotes, mRNA is synthesised with the aid of
Last Answer : In eukaryotes, mRNA is synthesised with the aid of A. RNA polymerase 3 B. RNA polymerase 2 C. RNA polymerase 1 D. Reverse transcriptase
Description : Which of the following alkane is synthesised from single alkyl halide by wurtz reaction:-
Last Answer : Which of the following alkane is synthesised from single alkyl halide by wurtz reaction:- A. B. C. D.
Description : How many ATP are directly synthesised in glycolysis from one glucose.
Last Answer : How many ATP are directly synthesised in glycolysis from one glucose.