CBSE 2022 | परिमेय संख्याएँ - L1 | Class 8 NCERT Maths Hindi Medium |Doubtnut | 8 PM | Manik Sir

Class 10 Maths (Hindi) | Chapter 8 | त्रिकोणमिति का परिचय | Important Questions and Quick Revision

KMnO_4 is prepared from the mineral pyrolusite, MnO_2 (deep purple colour). It acts as an oxidising agent in the neutral, alkaline as well as acidic medium in acidic medium it is used in volumetric analysis for estimation of Fe^(2+) , Cr_2O_4^(2-) salts etc. The titrations are carried out in presence of H_2SO_4 . However, before using it as a titrant, it is first standardised with standard oxalic acid solution or Mohr's salt solution . In one of the experiments on titration 26.8g of dry pure sodium oxalate (Mw=123gmol^-1) was dissolved in 1L of distilled water and then 100 mL of 2MH_2SO_4 were added. The solution was cooled. Now to this solution 0.1MKMnO_4 solution was added till a very faint pink colour persisted. Q. The purple colour of KMnO_4 is due to

KMnO_4 is prepared from the mineral pyrolusite, MnO_2 (deep purple colour). It acts as an oxidising agent in the neutral, alkaline as well as acidic medium in acidic medium it is used in volumetric analysis for estimation of Fe^(2+) , Cr_2O_4^(2-) salts etc. The titrations are carried out in presence of H_2SO_4 . However, before using it as a titrant, it is first standardised with standard oxalic acid solution or Mohr's salt solution . In one of the experiments on titration 26.8g of dry pure sodium oxalate (Mw=123gmol^-1) was dissolved in 1L of distilled water and then 100 mL of 2MH_2SO_4 were added. The solution was cooled. Now to this solution 0.1MKMnO_4 solution was added till a very faint pink colour persisted. Q. When pyrolusite is fused with KOH and KClO_3 , we get

KMnO_4 is prepared from the mineral pyrolusite, MnO_2 (deep purple colour). It acts as an oxidising agent in the neutral, alkaline as well as acidic medium in acidic medium it is used in volumetric analysis for estimation of Fe^(2+) , Cr_2O_4^(2-) salts etc. The titrations are carried out in presence of H_2SO_4 . However, before using it as a titrant, it is first standardised with standard oxalic acid solution or Mohr's salt solution . In one of the experiments on titration 26.8g of dry pure sodium oxalate (Mw=123gmol^-1) was dissolved in 1L of distilled water and then 100 mL of 2MH_2SO_4 were added. The solution was cooled. Now to this solution 0.1MKMnO_4 solution was added till a very faint pink colour persisted. Q. If 0.1MK_2Cr_2O_7 solution were used in place of 0.1 MKMnO_4 solution used would be

KMnO_4 is prepared from the mineral pyrolusite, MnO_2 (deep purple colour). It acts as an oxidising agent in the neutral, alkaline as well as acidic medium in acidic medium it is used in volumetric analysis for estimation of Fe^(2+) , Cr_2O_4^(2-) salts etc. The titrations are carried out in presence of H_2SO_4 . However, before using it as a titrant, it is first standardised with standard oxalic acid solution or Mohr's salt solution . In one of the experiments on titration 26.8g of dry pure sodium oxalate (Mw=123gmol^-1) was dissolved in 1L of distilled water and then 100 mL of 2MH_2SO_4 were added. The solution was cooled. Now to this solution 0.1MKMnO_4 solution was added till a very faint pink colour persisted. Q. The volume of KMnO_4 solution that must have been added to obtain the faint pink colour at the end point must be

KMnO_4 is prepared from the mineral pyrolusite, MnO_2 (deep purple colour). It acts as an oxidising agent in the neutral, alkaline as well as acidic medium in acidic medium it is used in volumetric analysis for estimation of Fe^(2+) , Cr_2O_4^(2-) salts etc. The titrations are carried out in presence of H_2SO_4 . However, before using it as a titrant, it is first standardised with standard oxalic acid solution or Mohr's salt solution . In one of the experiments on titration 26.8g of dry pure sodium oxalate (Mw=123gmol^-1) was dissolved in 1L of distilled water and then 100 mL of 2MH_2SO_4 were added. The solution was cooled. Now to this solution 0.1MKMnO_4 solution was added till a very faint pink colour persisted. Q. Mohr's salt, FeSO_4(NH_4)_2SO_46H_2O , is preffered over FeSO_4.7H_2O for standardisation of KMnO_4 solution because.

A 8gm sample of iron are containing V% (by wt) of iron (Fe^(2+)) was present in 1L solution. This solution required V ml of a KMnO_(4) solution for oxidation of Fe^(2+) in acidic medium. If in another titration 20ml of same KMnO_(4) is required, for oxidaton of 20ml of H_(2)O_(2) in acidic medium. Find volume strength of H_(2)O_(2)

Convert the following : a. 5 L of a solution into m^(3) b. 4 days into seconds c. 200 lb into kilogram d. 2.00 km into miles (1 "mile" = 1760 yd, 1 yd = 3 ft 1 "in" = 2.54 cm) e. 0.800 carat intog grams and kilograms e. 8.0 km into inches (1 m = 1.094 "yards" (yd), 1 yd = 36 "in") f. 40 Em (exa metre) (thickness of Milky way galaxy) into metre g. 1.4 Gm (gigmetre) diametre of sun) into metre h. 41 Pm (petametre) (distance of nearest star) into metre i. 1 fg (femotgram) (mass of human DNA molecule) into kilogram j. 500 Mg (megagram) (mass of a loaded jumbo jet) into kilogram