Description : What is used to break down compounds into elements during electrolysis?
Last Answer : nv hv
Description : What does common salt break into during electrolysis of its solution?
Last Answer : The products of the electrolysis are sodium hydroxide and chlorine.
Description : What is a chemical reaction in which compounds break up into simpler constituents?
Last Answer : It is a decomposition reaction.For example: What is the decomposition reaction for water?H2O(l) --> H2(g) + O2(g)
Description : Two or more substances (elements or compounds or both) that do not combine chemically during the mixing?
Last Answer : Mixtures
Description : During electrolysis, which the species are discharged at cathode? -Do You Know?
Last Answer : answer:
Description : A gas P is obtained at anode during the electrolysis of brine. The gas P when treated with excess of `NH_3` released a diatomic gas Q. Find the value
Last Answer : A gas P is obtained at anode during the electrolysis of brine. The gas P when treated with excess of `NH_3` ... x & y are the molar mass of P and Q.
Description : During the electrolysis of carnallite , `MgCl_(2)` is decomposed and not KCl . This is because of :
Last Answer : During the electrolysis of carnallite , `MgCl_(2)` is decomposed and not KCl . This is because of : A. lower ... both (A) and (B) D. none of the above
Description : Statement-1: Sodium chloride is added during electrolysis of fused anhdrous magnesium chloride. Statement-2: Anhydous magnesium chloride is obtained b
Last Answer : Statement-1: Sodium chloride is added during electrolysis of fused anhdrous magnesium chloride. Statement-2: ... -1 is false but Statement -2 is true
Description : Oxygen and hydrogen gases are produced at the anode and cathod erespectively during electrolysis of dilute aq. Solution of
Last Answer : Oxygen and hydrogen gases are produced at the anode and cathod erespectively during electrolysis of dilute aq. Solution ... (3)` C. HCl D. `CuSO_(4)`
Description : Ions moving towards the cathode during electrolysis of an aqueous solution of Ca(OH)2 are (a) OH (b) H+ (c) Ca2+ (d) 02
Last Answer : Ans:(a)
Description : During electrolysis, the cations and anions of the electrolyte are 1. Discharged 2. Hydrolysed 3. In motion 4. Hydrated The correct answers are: (a) 1 and 3 (b) 2 and 4 (c) 3 and 4 (d) 1 and 2
Description : During electrolysis, which the species are discharged at cathode?
Last Answer : Cations
Description : Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine? (A) Na2CO3 (B) NaHCO3 (C) H2 (D) None of these
Last Answer : (C) H2
Description : Wet chlorine gas produced during electrolysis of brine is dehydrated by (A) Spraying 66° Be H2SO4 counter current to the flow of the gas (B) Passing it through a bed of diatomaceous earth (C) Passing it through a bed of silica gel (D) None of these
Last Answer : (A) Spraying 66° Be H2SO4 counter current to the flow of the gas
Description : How could we prevent H+ ions to be discharged first than Na+ during electrolysis of aqueous solution of NaCl?
Last Answer : Ans: This could be prevented by using mercury cathode during this kind of electrolysis, because H+ ions need high voltage to be discharged at mercury cathode. In this way sodium got discharged at cathode despite H+ ions.
Description : During electrolysis of aqeous solution of NaCl, there are two type of anions are present Cl- and –OH, Cl- is discharged first than –OH,although it is present below Cl- in electrochemical series. Give reason.
Last Answer : Ans: During this electrolysis process Chloride ions come from NaCl, which is a strong electrolyte and ionize to large extent so concentration of chloride ions in solution will be high. ... chloride ions it is first discharged despite of its presence above than hydroxyl in electrochemical series.
Description : Why sulphuric acid is added to the water during electrolysis of water?
Last Answer : Ans: It is added to increase conduction of the water, because water is a weak electrolyte.
Description : Why carbon electrode is used during electrolysis of Nacl, instead of Pt electrode?
Last Answer : Ans: During electrolysis of Nacl, chlorine gas is produced at anode. Thus to avoid it’s reaction with platinum we use carbon electrode.
Description : During the electrolysis of a dilute aqueous solution of sulfuric acid, what happens to the sulfuric acid concentration?
Last Answer : ANSWER: IT REMAINS THE SAME
Description : During electrolysis of water, what gas is evolved fro the cathode?
Last Answer : ANSWER: HYDROGEN
Description : Why the blue colour of CuSO4 turns colourless during electrolysis of CuSO4 solution by platinum electrode.
Last Answer : The platinum electrodes are inert. Hence does not dissolve into the solution. The Cu++ ions (blue) present in the solution are discharged on the surface of cathode & OH - are ... a result of this electrolysis, blue coloured CuSO4 solution is slowly converted into colorless H2SO4 solution.
Description : Ionic compounds have high melting and boiling points because A) less energy is required to break the strong interionic attraction B) large amount of energy is required to break the interionic attraction C) No energy is required D) None of the above
Last Answer : B) large amount of energy is required to break the interionic attraction
Description : Those substances which have so far not been resolved by any means into other substances of simpler form are called A. elements B. compounds C. atoms D. molecules
Last Answer : Answer: A
Description : Which of the following is correct about the photorespiration? a. Photorespiration is more efficient in synthesizing glucose than photosynthesis. b. C3 plants are best adapted to handle c. ... During photorespiration plants use oxygen to break down carbohydrates and release e. All of these
Last Answer : c. Photorespiration is likely to occur when oxygen level is high and CO2 level is
Description : Find the ratio by mass of the combining elements in the following compounds. -Maths 9th
Last Answer : Ratio by mass of the following compounds given below : 1) CaCO : Molar mass of calcium = 40 g Molar mass of oxygen = 16 g Molar mass of carbon = 12 g Hence , ratio by mass will be = 40 : 12 : 48 = 10 : 3 : 12 2) ... g Ratio by mass = 14 : 3 6) Ca(OH) : Ratio by mass = 40 : 32 : 2 = 20 : 16 : 1
Last Answer : (a) CaCOg → Ca: C :0 = 40:12 : 48= 10 : 3:12 (b) MgCI2 → Mg : Cl = 24 : 2 x 35.5 = 24 : 71 (c) H2SO4 → H : S : O = 2 x 1 : 32 : 4 x 16 = 2 : 32 : 64= 1:16: 32 (d) C2H5OH → C : H : 0 = 2 x 12 : 6 x 1 ... N : H = 14 : 3 x 1=14: 3 (f) Ca (OH)2 → Ca : 0 : H = 40 : 2 x 16 : 2 x 1= 40: 32 :2 = 20 :16:1
Description : Since the enthalpy of elements in their natural state is taken to be zero, the heat of formation `(Delta_(f)H)` of compounds
Last Answer : Since the enthalpy of elements in their natural state is taken to be zero, the heat of formation `( ... C. is zero D. May be positive or negative
Description : Based on the compounds of group 15 elements, the correct statement (s) is (are)
Last Answer : Based on the compounds of group 15 elements, the correct statement (s) is (are) A. `Bi_(2)O_(5) ... bond is strogner than the `P - P` single bond
Description : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ionic in nature and hydrogen bonding is more important f
Last Answer : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ionic in nature ... H_(2)O lt H_(2)Te -` boiling point
Last Answer : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ... oxides are usually covalent and acidic in nature
Description : Which of the following elements react with metals to form their binary compounds exhibiting `-3` oxidation state ?
Last Answer : Which of the following elements react with metals to form their binary compounds exhibiting `-3` oxidation state ? A. N B. P C. As D. Bi
Description : Name five elements and five compounds those exist as gases at room temperature.
Last Answer : Name five elements and five compounds those exist as gases at room temperature.
Description : The chemical reactivity of noble gases involves the loss of electrons and hence it can form compounds with highly electronegative elements like F and
Last Answer : The chemical reactivity of noble gases involves the loss of electrons and hence it can form compounds with ... )d` and linear D. `sp` and linear
Last Answer : The chemical reactivity of noble gases involves the loss of electrons and hence it can form compounds with highly ... D. `sp^(3)d^(2)` & 2
Last Answer : The chemical reactivity of noble gases involves the loss of electrons and hence it can form compounds with highly ... A. zero B. 2 C. 6 D. 8
Description : The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid-base characteristics or on
Last Answer : The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid- ... . `H_(2)O` D. `CO_(2)`
Last Answer : The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their ... P_(2)O_(5)` D. `FeO, CuO`
Last Answer : The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their ... `Mn_(3)O_(4),N_(2)O_(5)`
Last Answer : The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their ... C. CO,NO D. `Na_(2),CaO`
Last Answer : The binary compounds of oxygen with other elements are called oxides. They are classified depending either upon their acid- ... . `N_(2)O, C_(3)O_(2)`
Description : Find out the s - block elements compounds importance/uses.
Last Answer : Find out the s - block elements compounds importance/uses.
Description : What Based on the content of most fertilizers name two elements other than carbon that are found in compounds in plants?
Last Answer : Nitrogen and phosporus
Description : Is platinum found in nature or is it only found combined with other elements in chemical compounds?
Last Answer : Platinum is found in the nature in elemental form.
Description : Is concrete a mixture of elements or mixture of compounds?
Last Answer : Concrete is a mixture of compounds.
Description : What elements will always form ionic compounds in a 12 ratio with zinc.?
Last Answer : Need answer