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 : Pick out the correct statement. (A) Chemical oxygen demand (COD) is a measure of chemically oxidisable organic matter present in water (B) COD is determined by oxidising the organic matter present in water with potassium dichromate ... of potable water may be 1-2 mg/litre (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : What happens when ethanol is heated with acidified potassium dichromate solution? Write the chemical equation.
Last Answer : Answer. Ethanol is oxidised to ethanoic acid with the help of acidified K2Cr2O7. CH3CH2OH + 2O → CH3COOH + H2O
Description : The oxidation state of chrominium in the final product formed in the reaction between `KI` and acidified potassium dichromate soluttion is
Last Answer : The oxidation state of chrominium in the final product formed in the reaction between `KI` and acidified potassium dichromate ... `+6` C. `+2` D. `+3`
Description : Thiamin is oxidized to thiochrome in alkaline solution by (A) Potassium permanganate (B) Potassium ferricyanide (C) Potassium chlorate (D) Potassium dichromate
Last Answer : Answer : B
Description : A 'breath test' used by traffic police to check drunken driving uses: (1) potassium dichromate-sulphuric acid (2) potassium permanganate-sulphuric acid (3) turmeric on filter paper (4) silica gel coated with silver nitrate
Last Answer : (1) potassium dichromatesulphuric acid Explanation: The main constituent of alcohol is Ethanol and the concentration of ethanol in a sample can be determined by back titration with acidified potassium ... contact with the yellow dichromate-coated crystals, the color changes from yellow to green.
Description : A green coloured solid compound ̳X , gets oxidized to reddish brown solid in presence of air. ̳X on heating gives brown coloured solid ̳Y and two pungent smelling gases ̳A and ̳B . ̳A turns acidified potassium ... , SO 3 , decomposition (d) FeSO 4 , Fe 2 O 3 , SO 3 , SO 2 , decomposition
Last Answer : (c) FeSO 4 , Fe 2 O 3, SO 2 , SO 3 , decomposition
Description : With respect to calibration of uv-vis spectrophotometer, which of the following material is used to evaluate the ‘control of absorbance’ A. Sodium thiosulphate B. Potassium dichromate C. Holmium oxide D. Potassium permanganate
Last Answer : B. Potassium dichromate
Description : What is the oxidation state of chromium in potassium dichromate?
Last Answer : ANSWER: +6 (or 6)
Description : A ‘breath test’ used by traffic police to check drunken driving uses: (1) potassium dichromate-sulphuric acid (2) potassium perma-nganatesulphuric acid (3) turmeric on filter paper (4) silica gel coated with silver nitrate
Last Answer : potassium dichromate-sulphuric acid
Description : What are the chemical signals of potassium ferrocyanide ?
Last Answer : : Chemical Signal of Potassium Ferrocyanide K4 [Fe (CN6)]
Description : What are the chemical signals of Potassium Nitrate ?
Last Answer : : Chemical signal of potassium nitrate KNO3
Description : What are the chemical signals of Potassium Sulphate ?
Last Answer : : Chemical signal of potassium sulphate K2SO4
Description : What are the chemical signals of Potassium Chloride ?
Last Answer : Chemical signal of potassium chloride KCl
Description : What are the chemical signals of Potassium Hydroxide ?
Last Answer : : The chemical signal of potassium hydroxide is KOH
Description : What are the chemical signals of Potassium Aluminum Sulphate ?
Last Answer : : Chemical Signals of Potassium Aluminum Sulphate Al2 (SO4) 3.K2SO4.24H2O
Last Answer : The chemical signal of potassium hydroxide is KOH
Last Answer : : The chemical signal of potassium permanganate is KMnO4
Description : Ammonium dichromate on heating liberates a gas. The same gas will be obtained by :
Last Answer : Ammonium dichromate on heating liberates a gas. The same gas will be obtained by : A. heating ` ... treating ammonia with `KMnO_(4)` in neutral medium
Description : The number of moles of dichromate used in oxidation of `RCH_(2)OH` to `RCO_(2)H` is __________
Last Answer : The number of moles of dichromate used in oxidation of `RCH_(2)OH` to `RCO_(2)H` is __________
Description : Isopropyl alcohol reacts with acidic sodium dichromate to give (a) Acetaldehyde (b) Acetic acid (c) Propionic acid (d) Acetone
Last Answer : Acetone
Description : What are the signals of Potassium and Calcium ?
Last Answer : K Potassium and Ca are signals of calcium
Description : What are the chemical signals of tungsten ?
Last Answer : W Tangestine signal
Description : What are the chemical signals of hafnium ?
Last Answer : Hf Hafnium's signal
Description : What are the chemical signals of Rubidium ?
Last Answer : Rb Rubidium tax signal
Description : What are the chemical signals of cobalt ?
Last Answer : Co cobalt's chemical signal.
Description : What are the chemical signals of iron ?
Last Answer : Fe Chemical signals of iron
Description : What are the chemical signals of manganese ?
Last Answer : Mn signal of manganese
Description : What are the chemical signals of chromium ?
Last Answer : Cr signal of chromium
Description : What are the chemical signals of scandium ?
Last Answer : Sc Scandium signal
Description : What are the chemical signals of gypsum ?
Last Answer : Chemical signal of gypsum CaSO4.2H2O.
Description : What are the chemical signals of detergent ?
Last Answer : Detergent chemical signal C12H25SO4NA.
Description : What are the chemical signals of iso propyl ?
Last Answer : Chemical signal of iso propyl CH3CH (OH) CH3.
Description : What are the chemical signals of ethane ?
Last Answer : Chemical code of ethane CH = CH.
Description : What are the chemical signals of phenol ?
Last Answer : Fennel signal C6H5-OH ...
Description : What are the chemical signals of rice ?
Last Answer : Answer : The chemical signal of rice is: C6H10O5
Description : What is cypermethrin , what are its chemical signals ?
Last Answer : Cypermethrin is an effective pesticide , its chemical symbol C22 H19 Cl2 NO3 ...
Description : What are the chemical signals of TNT ?
Last Answer : Answer : Chemical signals of TNT : C7 H5 N3 O6
Description : What are the chemical signals of cement ?
Last Answer : Ca0 SiO2 Al2O3 Fe2O3 H2O SO3 --- Cement
Description : What are the chemical signals of Dettol ?
Last Answer : Dettol's chemical signal C6H9ClO.
Description : What are the chemical signals of Zinc Sulphate ?
Last Answer : : Chemical signal of zinc sulphate ZnSO4
Description : What are the chemical signals of Gluber Salt ?
Last Answer : : Chemical Signal of Glover Salt 10H2O
Description : What are the chemical signals of calcium carbonate (limestone) ?
Last Answer : Chemical symbol of calcium carbonate (limestone) CaCO3
Description : What are the chemical signals of copper sulphate ?
Last Answer : : Chemical signal of copper sulphate CuSO4
Description : What are the chemical signals of Gold Chloride ?
Last Answer : : Chemical signal of gold chloride AuCl3
Description : What are the chemical signals of Ammonium Chloride ?
Last Answer : : Chemical signal of ammonium choroid NH4Cl
Description : What are the chemical signals of sodium choroid ?
Last Answer : : The chemical signal of sodium choroid (food salt) is NaCl
Description : What are the chemical signals of Ammonium Hydroxide ?
Last Answer : : Chemical signal of ammonium hydroxide NH4OH
Description : What are the chemical signals of Sodium Hydroxide ?
Last Answer : : The chemical symbol of sodium hydroxide is NaOH