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 : 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 : A single covalent bond (a) Is formed by the transfer of two electrons (b) Exists between hydrogen and chlorine in an aqueous solution, of hydrochloric acid (c) Is longer than a double bond (d) Does not require energy to disrupt it unlike an ionic bond
Last Answer : Ans:(c)
Description : Pick out the wrong statement. (A) Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate (B) Glass is decolorized during its manufacture by ... Na2O . CaO . 6SiO2 (D) Red color is imparted to glass by addition of arsenic oxide
Last Answer : (D) Red color is imparted to glass by addition of arsenic oxide
Description : Raschig ring made of porcelain cannot be used for treating concentrated (A) Hydrochloric acid (B) Nitric acid (C) Alkalis (D) Sulphuric acid
Last Answer : (C) Alkalis
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 : What is the resulting concentration (in molL) of aqueous hydrochloric acid if 500 mL of its gaseous form at 300 K and 100 kPa will be dissolved in 100 mL pure water Use 8.314 kPaL(Kmol)?
Last Answer : Feel Free to Answer
Description : The aqueous solution of which acids is called Vinegar - (1) Citric acid (2) Hydrochloric acid (3) Acetic acid (4) Oxalic acid
Last Answer : (3) Acetic acid Explanation: Vinegar is an aqueous solution of acetic acid and trace chemicals that may include flavorings. Vinegar typically contains 5–20% acetic acid by volume.
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 : An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change? (a) Baking powder (b) Lime (c) Ammonium hydroxide solution (d) Hydrochloric acid
Last Answer : (d) Hydrochloric acid
Description : Which of the following aqueous solutions would hav the lowest boiling point? Would it be a 1.0 molal solution of: w) Hydrochloric acid x) Sodium Hydroxide y) Acetic Acid, z) Magnesium Chloride
Last Answer : ANSWER: Y -- ACETIC ACID
Description : Urea is prepared by the chemical reactions of (a) Ammonium sulphate and calcium chloride (b) Ammonia and carbon dioxide (c) Chlorine and water (d) Acetamide and ethyl alcohol
Last Answer : Ans: (b)
Description : Bleaching powder is prepared by passing – (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne
Last Answer : (1) Chlorine over slaked lime Explanation: Calcium hypochlorite (bleaching powder) is manufactured by the calcium process: 2Cl2 + 2Ca(OH)2 (slaked lime) Ca(OCl)2 + CaCl2 + 2H2O. Bleaching powder is actually a mixture of calcium hypochlorite and the basic chloride with some slaked lime.
Description : Bleaching powder is prepared by passing : (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne
Last Answer : Chlorine over slaked lime
Description : The oxygen evolved during photosynthesis, comes from water molecules. Which one of the following pairs of elements is involved in this reaction? (a) Magnesium and Molybdenum (b) Magnesium and Chlorine (c) Manganese and Chlorine (d) Manganese and Potassium
Last Answer : (c) Manganese and Chlorine
Description : What happened when chlorine and hydrochloric acid combine to each other?
Last Answer : when chlorine mix to Hydrochloric acid (HCI) it will produce ofproduct of Hydrogen gas and Zinc Chloride. During Chemical Reactionthe particles of two chemical subtances will collide to each otherand it will produce heat.
Description : What is the substance that reacts with hydrochloric acid to produce chlorine gas?
Last Answer : This compound is the manganese dioxide, MnO2.
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 : Wood is corroded by (A) Hydrochloric acid (B) SO2 (dry or wet) (C) Chlorine (dry or wet) (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Gunmetal and bronze are not corroded by the action of (A) Wet chlorine (B) Synthetic detergent solution (C) Hydrochloric acid (10%) (D) Nitric acid (< 25%
Last Answer : (B) Synthetic detergent solution
Description : The sprayers are cleaned before use by— (A) 1% chlorine water (B) 1% hydrochloric acid (C) 1% ammonia water (D) 1% bromine water
Last Answer : (B) 1% hydrochloric acid
Description : Oxalic acid, `H_(2)C_(2)O_(4)`, reacts with paramagnet ion according to the balanced equation `5H_(2)C_(2)O_(4)(aq)+2MnO_(4)^(-)(aq)+6H^(+)(aq)hArr2Mn
Last Answer : Oxalic acid, `H_(2)C_(2)O_(4)`, reacts with paramagnet ion according to the balanced equation `5H_(2)C_(2)O_(4)(aq ... A. 13.6 B. 18.5 C. 33.8 D. 84.4
Description : Oxalic acid, `H_(2)C_(2)O_(4)`, reacts with paramagnet ion according to the balanced equation `5H_(2)C_(2)O_(4)(aq)+2MnO_(4)^(-)hArr2Mn^(2+)(aq)+10CO_
Description : Bromobenzene can be prepared by treating aniline with (a) Conc HBr (b) Br2/FeBr3 (b) CuBr (d) Nitrous acid then CuBr
Last Answer : Nitrous acid then CuBr
Description : Which of the following statements is false about toluene? (a) can be prepared by treating benzene with methyl chloride in the presence of AlCl3. (b) is converted to benzoic acid on refluxing with ... (d) can be nitrated with concentrated nitric acid to give a mixture of ortho and meta nitrotoluene.
Last Answer : can be nitrated with concentrated nitric acid to give a mixture of ortho and meta nitrotoluene
Description : Artificial transformation in laboratory is carried out by treating the cells with a. MgCl2 b. Cacl2 c. NaCl d. HCl
Last Answer : Ans: B
Description : Which of the following reagents is most suitable for preparing chlorobenzene from benzene? (a) Aqueous chlorine (b) Chlorine in the presence of ultraviolet light (c) Chlorine in acetic acid (d) Chlorine in the presence of FeCl3
Last Answer : Chlorine in the presence of FeCl3
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 : DDT is prepared by the reaction of chlorobenzene with (in the presence of conc. H2SO4) (a) Chloral (b) Chlorine (c) Chloroform (d) Carbon tetrachloride
Last Answer : Chloral
Description : Chlorobenzene can be prepared by treatment of aniline with (a) Cuprous chloride (b) Chlorine in the presence of UV light (c) Nitrous acid followed by treatment with CuCl (d) Chlorine in the presence of FeCl3
Last Answer : Nitrous acid followed by treatment with CuCl
Description : In the redox reaction . `MnO_(4)^(-)+C^(2)O_(4)^(2-)+H^(+) rarr Mn^(2+)+CO_(2)+H_(2)O` (Unbalance equation) 20 mL of 0.1 M `KMnO_(4)` react quantitive
Last Answer : In the redox reaction . `MnO_(4)^(-)+C^(2)O_(4)^(2-)+H^(+) rarr Mn^(2+)+CO_(2)+H_(2)O` ( ... . 40 mL of 0.1 M oxalate D. 50 mL of 0.25 M oxalate
Description : `MnO_(2)+4H^(+)+e^(-)rarrMn^(+3)+2H_(2)O` In the above reaction oxidation number of Mn change from :-
Last Answer : `MnO_(2)+4H^(+)+e^(-)rarrMn^(+3)+2H_(2)O` In the above reaction oxidation number of Mn change from :- A. `+2` to ... ` C. `+2` to `+3` D. `+4` to `+3`
Description : The reaction `2K_(2)MnO_(4)+Cl_(2)rarr 2KMnO_(4)+2KCl` is an example of
Last Answer : The reaction `2K_(2)MnO_(4)+Cl_(2)rarr 2KMnO_(4)+2KCl` is an example of A. Redox B. Reduction only C. Neutralization D. Disproportionation
Description : In the reaction : `MnO_(4)^(-)+xH^(+)+n e^(-)rarrMn^(2+)+yH_(2)O` What is the value of n :
Last Answer : In the reaction : `MnO_(4)^(-)+xH^(+)+n e^(-)rarrMn^(2+)+yH_(2)O` What is the value of n : A. 5 B. 8 C. 6 D. 3
Description : In the reaction `MnO_(4)^(-)+SO_(3)^(-2)+H^(+)rarrSO_(4)^(-2)+Mn^(2+)+H_(2)O`
Last Answer : In the reaction `MnO_(4)^(-)+SO_(3)^(-2)+H^(+)rarrSO_(4)^(-2)+Mn^(2+)+H_(2)O` A. `MnO_(4)^( ... `MnO_(4)^(-)` is oxidised and `SO_(3)^(2-)` is reduced
Description : Which of the following is used as a coagulant in treating turbid water? (A) Chlorine (B) Ferric sulphate (C) Calcium sulphate (D) Activated carbon
Last Answer : (B) Ferric sulphate
Description : Acetic anhydride is prepared in the laboratory by heating sodium acetate with
Last Answer : Acetic anhydride is prepared in the laboratory by heating sodium acetate with A. ethyl chloride B. acetyl chloride C. Conc. `H_(2)SO_(4)` D. zinc dust
Description : How is `H_(2)S` prepared in laboratory ?
Last Answer : How is `H_(2)S` prepared in laboratory ? A. `FeS + H_(2)SO_(4)` B. `FeSO_(4) + H_(2)SO_(4)` C. `FeS + HCl` D. Elemental `H_(2) +` elemental `S_(8)`
Description : In the laboratory `H_(2)S` is prepared by the action of
Last Answer : In the laboratory `H_(2)S` is prepared by the action of A. Dil HCl on FeS B. Dil `H_(2)SO_(4) ` on ` ... )` C. water on `Al_(2)S_(3)` D. Water on FeS
Description : The ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by `"NiCl"_(2).6H_(2)O` to form a stable coordination com
Last Answer : The ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by `"NiCl"_(2).6H_(2)O` ... Cl = 35.5, Ca = 40, Ni = 59)
Description : Iodobenzene can be prepared by (a) treating chlorobenzene with I2 using FeCl3 catalyst. (b) treating phenol with I2 in NaOH solution. (c) treating benzenediazonium chloride with KI (d) treating benzene with CH3I using AlCl3 catalyst
Last Answer : treating benzenediazonium chloride with KI
Description : Potassium acid oxalate `K_(2)C_(2)O_(4).3H_(2)C_(2)O_(4).4H_(2)O` can be oxidized by `MnO_(4)^(-)` in acid medium. Calculate the volume of (in mL) 1 M
Last Answer : Potassium acid oxalate `K_(2)C_(2)O_(4).3H_(2)C_(2)O_(4).4H_(2)O` can be oxidized by ... reacting in acid solution with 5.08 gram of the acid oxalate.
Description : What product is formed when electricity is passed throughan aqueous solution of sodium chloride? (1) Sodium and water (2) Sodium oxide (3) Sodium and chlorine (4) Sodium hydroxide
Last Answer : (4) Sodium hydroxide Explanation: When electricity is passed through an aqueous solution of sodium chloride, it gives hydrogen, chlorine and sodium hydroxide as a product.
Description : Which of the following gases is given off in the acid test of a carbonate mineral? w) chlorine x) nitrogen y) carbon dioxide z) sulfur dioxide
Last Answer : ANSWER: Y -- CARBON DIOXIDE
Description : The comple `[Fe(H_(2)O)_(6)NO]^(2+)` is formed in the brown ring test fro nitrates when freshly prepared `FesO_(4)` solution is added to aqueous solut
Last Answer : The comple `[Fe(H_(2)O)_(6)NO]^(2+)` is formed in the brown ring test fro nitrates when ... electrons is Fe. D. All the above are correct statement.
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 : 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 : Which out of carbon dioxide zinc chloride water and hydrogen is not produced from zinc carbonate and dilute hydrochloric?
Last Answer : This is hydrogen.