TRAVISTRA

"MISSION GANGA NOT UP TO THE MARK," SAYS THE STUDENTS "Mission Ganga is not efficient and not up to the mark," says the students. The Indian embassy at Keiv is not coordinating anything that the Indians need when they are trapped on the battlefield.  The Indian embassy is not providing any travel ways or rescue missions with the joining hands of the native government  The mission is aligned with Hungary, Poland , Romania, and the Slovak republic. The students in KYIV and KARKEIV are in danger. Poland and all the other country is too far away from these place if the Indian government-aligned and opened the border of Russia it would be more useful for the rescue mission.  It will be too hard to travel 1500km to reach the Poland border in a country marshal law is initiated and it is literally impossible without any strategic support from the native government. Still, there are thousands of students trapped in the capital Kyiv 

 THIN LAYER CHROMATOGRAPHY It is a chromatographic separation method used to separate mixtures, to check the purity of a mixture, and to monitor the progress of the reaction. Procedure A glass plate coated with a material of the adsorbent will constitute the stationary phase. The material is made into a slurry or a paste and the glass plate is coated with it by a thin layer applicator and dried. This glass plate with a thin layer of stationary phase is called chromatoplate. The mixture to be separated is applied to one end of the plate and it is placed in the solvent. When the solvent reaches near the top, it is removed and dried. If the components are colored the spots can be readily located. If the components are colorless the dried plate is sprayed with a suitable reagent to make the spot colored. In this way, the position of the components is located and their Rf values are determined. Rf value is the ratio of the distance traveled by a component to the distance traveled by the...

 AUSTRALIA OPENS THERE INTERNATIONAL BORDER Australia will open its border on 21st February They are opening their border after 2 years It will be more helpful for students and foregoing working professionals  Australia will reopen its borders on 21st February for fully vaccinated tourists, said Scott Morrison the Prime Minister of Australia. Australia shuts there border in March 2020 to protects itself from the covid 19 virus from then there was a handful of tourists were allowed to enter the country  This decision would be more helpful for the students and the foreign working professionals who had been working or studying there for 2 years There will be a need for full vaccination and RTPCR test results within the last 48 hours for tourists 

 CORROSION Corrosion is the destruction of metals and alloys by the chemical or electrochemical reaction with the environment.  During corrosion, metals are converted to metallic compounds at the surface and these compounds wear away as corrosion products. The corrosion of iron is known as rusting. Examples of corrosion are: Rusting of iron in the moist atmosphere form Fe2O3.2H2O Formation of basic CuCO3 (green film) on the surface of copper. The reaction of chlorine gas with Mg or Sn. Rate of corrosion It is expressed in Milligrams per year (mpy). mpy= 534W/DAT  Where W=weight loss in mg, D= the density of the material in g/cm2, A= the area of the material in sq. inch, T= exposure time in an hour. Mechanism of Corrosion They are of two types Direct chemical corrosion or dry corrosion (oxidation, corrosion due to other gases, liquid metal corrosion) and Electrochemical corrosion or wet corrosion.0 Electrochemical or WET corrosion This type of corrosion takes place when...

 LITHIUM-ION BATTERY Lithium-ion batteries are secondary rechargeable batteries.  It has an emf that varies from 3.5-4V depending on electrode potential. Construction The 3 primary components of a lithium-ion battery are: The anode is lithiated graphite (graphite in which lithium ions are inserted in between the layer of carbon atoms. The cathode is a mixed metal oxide like LiCoO2,  LiMnO2 or LiFeO2  The electrolyte is a lithium salt (LiPF6, LiBF4, or LiClO4 ) in an organic solvent. This is rechargeable. This is done by applying a higher voltage than the voltage of the battery, across the electrodes. The lithium-ion moves from anode to cathode during discharging and from cathode to anode while charging. Cell reaction Anode : LixC6  --->   6C + x Li+  + x e- Cathode : Li1-x CoO2 + x Li+  + xe ----->   LiCoO2 Overall cell reaction : LixC6 + Li1-x CoO2  ------->   LiCoO2  +6C Characteristics Depending on ...

 ELECTRODES AND TYPES OF ELECTRODES ELECTRODES  Electrodes are materials which  is  a good conductor of electricity and chemical reaction  TYPES OF ELECTRODES 1. Metal-Metal ion electrode e    In this electrode a metal rod is immersed in its own salt solution      eg: Zn (znso 4 )   2. Metal-metal insoluble salt electrode     In this electrode, metal is coated by insoluble salt  and it is immersed in a solution containing a common   ion    eg: calomel electrode    3. Gas electrode      In this electrode, an inert metal is immersed in a solution containing ions of the gas is continuously bubbled through the solution eg: Standard Hydrogen Electrode 4. Ion-selective electrode        It is a sensor that converts the concentration of a specific ion dissolved in a solution into an electric potential  eg: Glass Electrode 5. Redox Electrode  ...