Description : What is the color of zinc metal? What happens to its color when zinc reacts with the hydrochloric acid?
Last Answer : Answer. Silverfish gray. When zinc reacts with HCl, the resulting solution becomes colorless (white) and zinc turns into black colored zinc chloride.
Description : When zinc reacts with hydrochloric acid, the gas evolved is (a) Oxygen (b) Hydrogen (c) Chlorine (d) None of these
Last Answer : Ans:(b)
Description : What is the reaction when solid manganese dioxide reacts with hydrochloric acid to produce manganese chloride liquid water and chlorine gas?
Last Answer : The chemical reaction is:MnO2 + 4 HCl = MnCl2 + Cl2 + 2 H2O
Description : What is the substance that reacts with hydrochloric acid to produce chlorine gas?
Last Answer : This compound is the manganese dioxide, MnO2.
Description : ________ does not react with dilute hydrochloric acid but reacts with sulphuric acid and does not liberate hydrogen gas. a) iron b)copper c)gold d)zinc
Last Answer : b)copper
Description : The gas liberated when red hot silicon reacts with steam is
Last Answer : hydrogen.
Description : A compound X' on heating with excess conc. sulphuric acid at 443 K gives an unsaturated compound Y'. X' also reacts with sodium metal to evolve a colourless gas Z'. Identify X', Y' ... the chemical reaction of formation of Y' and also write the role of sulphuric acid in the reaction. -Science
Last Answer : X-Ethanol/ (C2H5OH)/Ethyl AlcoholY- Ethene / (C2H4)Z- Hydrogen/ (H2)Role of sulphuric acid - dehydrating agent
Description : Identify the products formed when 1 mL of dil. Hydrochloric acid is added to 1g of Sodium metal? -Science
Last Answer : When dilute HCl, which is an acid, added to sodium carbonate, a strong base, the neutralization reaction occurs by the formation of NaCl and the evolution of carbon dioxide gas by brisk effervescence.
Description : Give reason: a) Magnesium reacts more vigorously with hydrochloric acid than zinc or copper. b) Iron takes more time to react with dilute hydrochloric acid than magnesium and zinc
Last Answer : a) Magnesium reacts more vigorously with hydrochloric acid than zinc or copper. The reactivity of magnesium is higher than that of zinc. Hence it reacts with hydrochloric acid more vigorously. b) ... acid than magnesium and zinc As iron has lowest reactivity when compare to magnesium and zinc.
Description : Write balanced chemical equations for the following reactions: (a) Dilute sulphuric acid reacts with aluminium powder. (b) Dilute hydrochloric acid reacts with sodium carbonate. (c) Carbon dioxide is passed through lime water. -Chemistry
Last Answer : i hope it helped you
Description : 2 ml each of concentrated HCl, HNO3 and a mixture of concentrated hydrochloric acid and Concentrated nitric acid in the ratio of 3:1were taken in test tubes labelled as A, B and C, A small piece of metal was put in ... the metal dissolved in test tube C. The metal could be: A) Al B) Au C) Pt D) Cu
Last Answer : B) Au
Description : The amount of heat liberated when one mole of `NH_(4)OH` reacts with one mole of HCl is
Last Answer : The amount of heat liberated when one mole of `NH_(4)OH` reacts with one mole of HCl is A. 13.7 ... Kcal C. Less than 13.7 Kcal D. Cannot be prodicted
Description : What volume of `O_(2)` is liberated when 3 moles of `SO_(2)` reacts with sufficient volume of `O_(3)`
Last Answer : What volume of `O_(2)` is liberated when 3 moles of `SO_(2)` reacts with sufficient volume of `O_(3)` A. Zero B. 2 Vol C. 3 Vol D. `0.5` Vol
Description : A student dropped few pieces of marble in dilute hydrochloric acid contained in a test tube. The evolved gas was then passed through lime water. What change would be observed in lime water? Write balanced chemical equation for both the change observed?
Last Answer : Answer. When dilute HCl is added to marble which is calcium carbonate, it forms calcium chloride, water and carbon dioxide. The chemical equation for the reaction is as follows: CaCO3 + 2HCl → CaCl2 + H2O ... reaction between lime water and carbon dioxide is as follows: Ca(OH)2 + CO2 → CaCO3 + H2O
Description : Which of the following is the most important chemically-active fluid involved in the formation of rocks? w) hydrochloric acid x) sulfuric acid y) water z) methane
Last Answer : ANSWER: Y -- WATER
Description : Which gas is always produced if a metal reacts with water or dilute acid?
Last Answer : Hydrogen
Description : During discharge of a lead-acid storage battery, which of the following actions occurs? A. The acid becomes stronger. B. Both plates change chemically to ammonium chloride. C. The acid becomes weaker. D. Hydrogen gas is liberated.
Last Answer : Answer: C
Description : Caution must be exercised during the charging of lead-acid storage batteries as _____________. A. the acid will become weaker B. hydrogen gas is being continuously liberated C. both plates are changing chemically to lead sulfate D. lead peroxide in the negative plate is poisonous
Last Answer : Answer: B
Description : The charging of lead-acid storage batteries will always result in __________. A. dangerous acid burns B. a dangerously explosive gas being liberated C. the danger of lead poisoning D. all of the above
Description : Local action in a dry-cell, or lead-acid storage battery is the process whereby ________________. A. hydrogen gas is liberated B. the electrolyte compensates for overcharging C. potassium hydroxide ... carbon dioxide from the air D. the battery becomes discharged without being connected to a load
Last Answer : Answer: D
Description : Which gas is liberated when Calcium carbonate is reacted with dil acid ?
Last Answer : It reacts with dilute acid to liberate carbon dioxide.
Description : Name the gas liberated when alkali metals react with dil acid?
Last Answer : The alkaline earth metals readily react with acids liberating dihydrogen gas . M + 2HCl →→MCl2 + H2
Description : 10.(a) An ore on treatment with dilute hydrochloric acid produces brisk effervesces. What type of ore is this? What steps will be required to obtain metal from the enriched ore. , (b) ... in coin and colour of the solution ? Write balanced chemical equation of the reaction involved. -Chemistry
Last Answer : (a) Carbonate ore: (i) Calcination: Carbonate ore is heated in limited supply of air and oxide is obtained, e.g. (b) Copper, being more reactive than silver will displace silver from silver nitrate ... and there will be deposition of silver on copper coin. The colour of solution will turn to blue.
Description : (a) What is the role of hydrochloric acid in our stomach ? -Science
Last Answer : Hydrochloric acid: It makes the medium of gastric juice acidic so that the enzyme pepsin can digest the proteins properly and also kills any bacteria that might have entered the stomach with food.
Description : When equal weight of methyl alcohol and ehtyl alcohol react with excess of sodium metal, the volume of `H_(2)` liberated is more in the case of
Last Answer : When equal weight of methyl alcohol and ehtyl alcohol react with excess of sodium metal, the volume of `H_(2 ... in both D. `H_(2)` is not liberated
Description : Blister copper is refined by stirring moltem impure metal with green logs of wood because such a wood liberated hydrocarbon gases like `(CH_(4))`. The
Last Answer : Blister copper is refined by stirring moltem impure metal with green logs of wood because such a wood ... poling, Y=CuO D. X=cupellation, Y=CuO
Description : What happens when concentrated hydrochloric acid is poured into a test tube containing zinc granules?
Last Answer : Zinc reacts with concentrated hydrochloric acid vigorously forming and the chemicals spill out of the test tube.
Description : The colour observed when hydrochloric acid and Fehling’s solution is added to test sugar
Last Answer : is reddish.
Description : The chemical added to test the presence of sugar are hydrochloric acid and Fehling’s
Last Answer : solution.
Description : To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of A. Hydrochloric acid B. Sulphuric acid C. Nitric acid D. Citric acid
Last Answer : ANS: B
Description : Zinc granules on treating with an acid X, form the zinc sulphate (ZnSO4) salt along with the evolution of a gas Y which burns with a pop sound when brought near to a burning candle. Identify the acid X and ... (c). X- Sulphuric acid and Y- Hydrogen gas (d). X- Hydrochloric acid and Y- Hydrogen gas
Last Answer : (c). X- Sulphuric acid and Y- Hydrogen gas
Description : A greenish yellow gas reacts with an alkin metal hydroxide to form a halate which can be used in fireworks and saftey matches. The gas and the halate
Last Answer : A greenish yellow gas reacts with an alkin metal hydroxide to form a halate which can be used in fireworks and ... C. (3)`l_2, NalO_3` D. (4) none
Description : If 31.3 g of manganese(II) chloride 48.3 g of chlorine gas and 25.7 g of water react to produce manganese(IV) oxide and hydrochloric acid what is the limiting reactant and what mass of hydrochloric?
Last Answer : Need answer
Description : 25 mL of household bleach solution was mixed with 30 mL of o.50 M Kl and 10 mL of 4N acetic acid. In the titration of the liberated iodine, 48 mL of 0
Last Answer : 25 mL of household bleach solution was mixed with 30 mL of o.50 M Kl and 10 mL of 4N acetic acid. In the titration ... B. 0.96 M C. 0.24 M D. 0.024 M
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 : One mole of aniline warmed with the mixture of `NaNO_(2)+HCl`. If we assume 100% yield, volume of `N_(2)` gas liberated at S.T.P is
Last Answer : One mole of aniline warmed with the mixture of `NaNO_(2)+HCl`. If we assume 100% yield, volume of `N_(2)` gas ... 4 L` C. `33.6 L` D. `44.8 L`
Description : During photosynthesis the liberated gas is (1) Carbon dioxide (2) oxygen (3) Nitrogen (4) Hydrogen
Last Answer : (2) oxygen Explanation: Photosynthesis is a process used by plants and other organisms to convert the light energy captured from the sun into chemical energy that can be used to fuel the organism ... water, releasing oxygen as a waste product.' Photosynthesis is vital for all aerobic life on Earth.
Description : The gas liberated in the Bhopal gas tragedy was: (1) Pheynl isocynate (2) Acetylene (3) Ethylene (4) Methyl isocynate
Last Answer : (4) Methyl isocynate Explanation: The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, ... the night of 2-3 December 1984. It is considered the world's worst industrial disaster.
Description : Presence of nitrogen in combustion air does not reduce the (A) Amount of heat liberated (B) Flame temperature (C) Flue gas temperature (D) Any of the above
Last Answer : (A) Amount of heat liberated
Description : During photosynthesis the liberated gas is : (1) Carbon dioxide (2) Oxygen (3) Nitrogen (4) Hydrogen
Last Answer : Oxygen
Last Answer : Methyl isocynate
Last Answer : Gas is usually not liberated due to dissociation of transformer oil unless the oil temperature exceeds 150°C.
Description : The rate at which a chemical substance reacts is proportional to its (A) Active mass (B) Molecular weight (C) Equivalent weight (D) Atomic weigh
Last Answer : (A) Active mass
Description : The rate at which a chemical substance reacts is proportional to its (A) Active mass (B) Equivalent weight (C) Molecular weight (D) None of these
Description : "The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances". This is the (A) Lewis- ... (B) Statement of Van't Hoff Equation (C) Le-Chatelier's principle (D) None of these
Last Answer : (D) None of these
Description : Acid Reacts with metals and released............gas. (a) Carbon di oxide (b) Water (c) Hydrogen (d) None
Last Answer : (c) Hydrogen
Description : when a carbonate reacts with an acid,it produces carbon dioxide gas. how can this reaction be used in our dairy life -Biology
Last Answer : answer:
Description : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts nitrous acid then occurs a brisk evolution of `N_(2)` gas. A dissolve
Last Answer : Compound A is chiral and has the molecular formula `C_(8)H_(11)N`. When A reacts ... . 1-phenylethanamine C. 1-cyclohexylethanamine D. N-ethylaniline
Description : An organic acid (A) reacts with concentrated oxide (C) and a diatomic oxide (D). When D reacts with chlorine gas a poisonous gas (E) is evolve. This g
Last Answer : An organic acid (A) reacts with concentrated oxide (C) and a diatomic oxide (D). When D reacts ... hybridization D. The compound `F=NH_(2)CONH_(2)`