Description : The metal A is prepared by the electrolysis of fused chloride. It reacts with hydrogen to form a colourless solid from which hydrogen is released on t
Last Answer : The metal A is prepared by the electrolysis of fused chloride. It reacts with hydrogen to form a colourless solid from ... is A. Al B. Ca C. Cu D. Zn
Description : Acid Reacts with metals and released............gas. (a) Carbon di oxide (b) Water (c) Hydrogen (d) None
Last Answer : (c) Hydrogen
Description : A compound X of the formula `C_(2)H_(6)O` on reaction with Na metal gave Y, X also reacts with `PC1_(5)` to give Z the product obtained in the reactio
Last Answer : A compound X of the formula `C_(2)H_(6)O` on reaction with Na metal gave Y, X also reacts with `PC1_(5)` to ... )H_(5)` D. `C_(2)H_(5)OC_(2)H_(5)`
Description : When Calcium reacts with water it starts floating on top of water because A) bubbles of carbon dioxide formed stick to the surface of metal B) bubbles of hydrogen formed stick to the surface of metalC) Calcium is lighter than water D) None of the above
Last Answer : B) bubbles of hydrogen formed stick to the surface of metal
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 : Which of the following molecules or ions is NOT formed when K metal reacts with liquid CH3OH? Is it: w) potassium ion x) hydrogen ion y) methoxy ion z) hydrogen molecule
Last Answer : ANSWER: X -- HYDROGEN ION
Description : Assertion (A): Diethyl ether reacts with hot Conc `H_(2)SO_(4)` and gives ethyl hydrogen sulphate Reason (R): The reaction involves cleavage of C-O bo
Last Answer : Assertion (A): Diethyl ether reacts with hot Conc `H_(2)SO_(4)` and gives ethyl hydrogen sulphate Reason (R ... R is false D. A is false but R is true
Description : Sodium reacts with water to form sodium hydroxide and hydrogen gas. The balanced equation which represents the above reaction is (a) Na(s) + 2H20(l) → 2NaOH(aq) + 2H2(g) (b) 2Na(s) + 2H2O(l) → 2NaOH(aq) +H2(g) (c) 2Na(s) + 2H20(l) → NaOH(aq) + 2H2(g) (d) 2Na(s) + H20(l) - 2NaOH(aq) + 2H2(g)
Last Answer : Answer: (b)
Description : Pick out the wrong statement. (A) Addition of methane to the furnace atmosphere reduces decarburising by hydrogen (B) Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon ... the metal surface) cause nitride formation with increase in surface hardness (D) None of these
Last Answer : (D) None of these
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 : In the first stage of photosynthesis, light energy splits water molecules leaving a by-product which is released. This byproduct is: a) hydrogen b) carbon dioxide c) oxygen d) methane
Last Answer : ANSWER: C -- oxygen
Description : What is a energy released when a compound reacts to make a new compound?
Last Answer : i think the energy is called chemical energy, or chemicalcombination. im not sure if that's correct
Description : Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2 , is not practised, as it is (A) A slow reaction (B) A discontinuous reaction (requiring regeneration of ... in development stage (by employing fluidised bed technique) (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Hydrogen gas is not produced commercially (for nitrogenous fertiliser manufacture) by (A) Iron-steam reaction (B) Electrolysis of water (C) Steam reforming of naphtha (D) Its cryogenic separation from coke oven gas
Last Answer : (A) Iron-steam reaction
Description : Write chemical equation reactions taking place when carried out with the help of (a) Iron reacts with steam (b) Magnesium reacts with dil HCl (c) Copper is heated in air. -Chemistry
Last Answer : This is the Answer.
Description : The nitrogen compound formed when `CaCN_(2)` reacts with steam or hot water is
Last Answer : The nitrogen compound formed when `CaCN_(2)` reacts with steam or hot water is A. `N_(2)O` B. NO C. `NO_(2)` D. `NH_(3)`
Description : The gas liberated when red hot silicon reacts with steam is
Last Answer : hydrogen.
Description : A compound reacts with steam in the presence of concentrated H2SO4 to give isopropyl alcohol. The compound could be (a) Alkane (b) Alkyne (c) Alkene (d) Allene
Last Answer : Alkene
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
Description : Compound A reacts with Na metal to give B. A also reacts with `PCl_(5)` to give C. B and C reacts with each other to give dimethyl ether. Then A, B an
Last Answer : Compound A reacts with Na metal to give B. A also reacts with `PCl_(5)` to give C. B and C reacts with each ... )Cl` D. `CH_(3)Cl, CH_(4), CH_(3)OH`
Description : p-cresol reacts with chloroform in alkaline medium to give the compound A which adds hydrogen cyanide to form, the compound B. the latter on acedic hy
Last Answer : p-cresol reacts with chloroform in alkaline medium to give the compound A which adds hydrogen cyanide to form, ... the carboxylic acid is A. B. C. D.
Description : Hydrogen peroxide solution `(20 mL)` reacts quantitatively with a solution of `KMnO_(4) (20 mL)` acidified with dilute of `H_(2)SO_(4)`. The same volu
Last Answer : Hydrogen peroxide solution `(20 mL)` reacts quantitatively with a solution of `KMnO_(4) (20 mL)` ... calculate the molarity of `H_(2)O_(2)`.
Description : A compound reacts with sodium and liberates hydrogen and on oxidation gives ketone. The formula of the compound could be
Last Answer : A compound reacts with sodium and liberates hydrogen and on oxidation gives ketone. The formula of the compound could ... `CH_(3)CH_(2)CH_(2)CH_(2)OH`
Description : Is reacts with acid to form hydrogen a physical property or a chemical property?
Last Answer : it is chemical change
Description : What is the chemical equation for hydrogen iodide gas reacts with bromine gas?
Last Answer : The chemical reaction is:2 HI + Br2 = 2 HBr + I2
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 formed when zinc reacts with sodium hydroxide? (a) Zinc hydroxide and sodium (b) Sodium zincate and hydrogen gas (c) Sodium zinc-oxide and hydrogen gas (d) Sodium zincate and water
Last Answer : (b) Sodium zincate and hydrogen gas
Description : Benzoyl chloride reacts with hydrogen in the presence of palladium and barium sulfate to give : (a) Benzyl alcohol (b) Benzaldehyde (c) Cinnamic acid (d) Benzophenone
Last Answer : Benzaldehyde
Description : Cyclobutane reacts with hydrogen in the presence of nickel catalyst at 200°C to give (a) Butane (b) 1-Butene (c) 2-Butene (d) None of these
Last Answer : Butane
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 : While conducting Luminol test, luminol reacts with hydrogen salt and forms: (a) Di-anion (b) Cation (c) Anion (d) All of the above
Last Answer : Ans: (a). Di-anion
Description : Write balanced equations for the reaction of: (i) aluminium when heated in air. Write the name of the product. (ii) iron with steam. Name the product obtained. (iii) calcium with water. Why does calcium start floating in water? -Chemistry
Last Answer : The bubbles of hydrogen stick to the surface of metal that is why it floats.
Description : What kind of reaction is metal plus water ae metal hydroxide plus hydrogen?
Last Answer : Feel Free to Answer
Description : How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal? -Science
Last Answer : Bring a burning matchstick near the gas. It burns with ‘pop’ sound showing that it is 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 : `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 : Statement-1: Carbon is not used as a reducing agent for the extraction of group 2 metals. Statement-2: Carbon reacts with group 2 metal to give carbid
Last Answer : Statement-1: Carbon is not used as a reducing agent for the extraction of group 2 metals. Statement ... Statement-1 is false but Statement -2 is true
Description : (A) Auto reduction of ore is used for the extraction of copper (R ) The sulphide ore of copper reacts with its oxide to the give the metal
Last Answer : (A) Auto reduction of ore is used for the extraction of copper (R ) The sulphide ore of copper reacts ... . If (A) is incorrect but (R ) is correct
Description : Metal reacts with sulphur to give
Last Answer : Metal reacts with sulphur to give A. Sulphide B. Sulphite C. Sulphate D. Thiosulphate
Description : What metal reacts water?
Last Answer : Need answer
Description : What metal that goes rusty when it reacts with water?
Last Answer : Ferrous metals such as iron will quickly go rusty by reacting with air and water.
Description : Why is it that calcium is a soft grey metal that reacts quickly with water. Our bones contain calcium but they are not grey in colour and do not react with water?
Last Answer : Bones contain hydroxyapatite - Ca10(PO4)6(OH)2., not pure calcium.
Description : Why camphor disappears when kept on a plate? (a) It sublimes (b) It reacts with the metal of the container (c) It reacts with the gases of the air (d) None of the above
Last Answer : Ans:(a)
Description : (2) brown bottles stops the passage of light through it Explanation: Silver Nitrate is stored in dark bottles in a laboratory to prevent chemical reactions as it is sensitive to light. It reacts to light to produce silver metal.
Last Answer : In upper layer of atmosphere ozone is formed by - (1) the action of ultraviolet rays on oxygen (2) the combination of oxygen molecules (3) subjecting oxygen to high pressure (4) the action of nitrogen on oxygen in atmosphere
Description : When Metal carbonate reacts with dilute acids, what does it forms?
Last Answer : CO2
Description : Which gas is always produced if a metal reacts with water or dilute acid?
Last Answer : Hydrogen
Description : Diethyl ether reacts with sodium metal to give (a) Ethanol (b) Sodium ethoxide (c) Ethanal (d) Nothing happens
Last Answer : Nothing happens
Description : Compound (A) reacts with sodium metal to form one mole of H2. The compound (A) can be (a) CH3CH2CH=CH2 (b) HOCH2CH2CH2CH2OH (c) CH=CH–CH=CH2 (d) CH3CH2CH2CH2OH
Last Answer : HOCH2CH2CH2CH2OH