GPSC Assistant Professor Result 2021: Gujarat Public Service Commission (GPSC) has declared the result for the post of Assistant Professor for Chemistry subject on its official website. All such candidates applied for the Assistant Professor posts against advt no 93/2018-19 can check the result available on the official website of Gujarat Public Service Commission i.e.gpsc.gujarat.gov.in.

Copper and Nitric Acid. When you place a piece of copper in nitric acid, the Cu ions and nitrate ions. Mar 26, 2020 Other times, errors in the chemistry lab result from instrumental limitations. While measuring devices strive for complete accuracy, they may not yield entirely accurate results. A digital scale, for instance, might only round a number to the next three decimal places, when instead the experiment calls for more accurate results to a higher number.

Gujarat Public Service Commission has uploaded the list of provisionally selected candidates for Assistant Professor post in Chemistry subject on its official website. Now shortlisted candidates will be called for Interview round as per the selection process for Assistant Professor in Government Arts, Science & Commerce College, GES, Class-2 posts.

All such candidates who have applied for the Assistant Professor for Chemistry Subjects for Government Arts, Science & Commerce College, GES, Class-2 can check the provisional list available on the official website. However you can check the GPSC Result 2021 Out for Assistant Professor Chemistry Post also with the direct link given below.

Direct Link for GPSC Result 2021 for Assistant Professor Chemistry Post
https://gpsc.gujarat.gov.in/Documents/AdvertismentDocument/LECI-93-2018-19.pdf

How to Download: GPSC Result 2021 for Assistant Professor Chemistry Post

Visit the official website of Gujarat Public Service Commission (GPSC) i.e-gpsc.gujarat.gov.in
Go to the News & Events List section of the Home Page.
Click on the link-Eligibility list (Interview) 93/2018-19 Assistant Professor, Chemistry in Government Arts, Science & Commerce College, GES, Class-2 View attachment given on the Home Page.
You will get the PDF of the desired Result in a new window.
Candidates should take Print Out of PDF and save a copy for future reference.

General Knowledge for Exams

Current Affairs for Exams

Latest Job Notifications

This page describes how to perform a flame test for a range of metal ions, and briefly discusses how the flame color arises. Flame tests are used to identify the presence of a relatively small number of metal ions in a compound. Not all metal ions give flame colors. For Group 1 compounds, flame tests are usually by far the easiest way of identifying which metal you have got. For other metals, there are usually other easy methods that are more reliable - but the flame test can give a useful hint as to where to look.

Practical Details in Carrying out Flame Tests

Clean a platinum or nichrome (a nickel-chromium alloy) wire by dipping it into concentrated hydrochloric acid and then holding it in a hot Bunsen flame. Repeat this until the wire produces no color in the flame.
When the wire is clean, moisten it again in the acid and then dip it into a small amount of the solid to be tested so that some sticks to the wire. Place the wire back in the flame.
If the flame color is weak, it is often helpful to dip the wire back in the acid and put it back into the flame as if cleaning it. This should produce a very short but intense flash of color.

There will, in fact, always be a trace of orange in the flame if you use nichrome. Platinum is much better to use but is much, much more expensive. If you have a particularly dirty bit of nichrome wire, you can just chop the end off. You do not do that with platinum! Dilute hydrochloric acid can be used instead of concentrated acid for safety reasons, but does not always give such intense flame colors.

The colors in Table (PageIndex{1}) are just a guide. Almost everybody sees and describes colors differently. I have, for example, used the word 'red' several times to describe colors that can be quite different from each other. Other people use words like 'carmine' or 'crimson' or 'scarlet', but not everyone knows the differences between these words - particularly if their first language is not English.

Results In Chemistry Journal

Table (PageIndex{1}): Flame colors of common elements
Element	flame color
Lithium	red
Sodium	strong, persistent orange
Potassium	lilac (pink)
Rubidium	red (red-violet)
Cesium	blue/violet (see below)
Calcium	orange-red
Strontium	red
Barium	pale green
Copper	blue-green (often with white flashes)
Lead	gray-white

What do you do if you have a red flame color for an unknown compound and do not know which of the various reds it is? Get samples of known lithium, strontium (etc) compounds and repeat the flame test, comparing the colors produced by one of the known compounds and the unknown compound side by side until you have a good match.

New J Chem Impact Factor

The Origin of Flame Colors

If you excite an atom or an ion by very strong heating, electrons can be promoted from their normal unexcited state into higher orbitals. As they fall back down to lower levels (either in one go or in several steps), energy is released as light. Each of these jumps involves a specific amount of energy being released as light energy, and each corresponds to a particular wavelength (or frequency). Ladbrokes casino promo code 2018 printable. As a result of all these jumps, a spectrum of lines will be produced, some of which will be in the visible part of the spectrum. The color you see will be a combination of all these individual colors.

In the case of sodium (or other metal) ions, the jumps involve very high energies and these result in lines in the UV part of the spectrum which your eyes can't see. The jumps that you can see in flame tests come from electrons falling from a higher to a lower level in the metal atoms. So if, for example, you put sodium chloride which contains sodium ions, into a flame, where do the atoms come from? In the hot flame, some of the sodium ions regain their electrons to form neutral sodium atoms again. A sodium atom in an unexcited state has the structure 1s²2s²2p⁶3s¹, but within the flame there will be all sorts of excited states of the electrons. Sodium's familiar bright orange-yellow flame color results from promoted electrons falling back from the 3p¹ level to their normal 3s¹ Rosen frederiksberg slot. level.

Results In Materials Impact Factor

The exact sizes of the possible jumps in energy terms vary from one metal to another. That means that each different metal will have a different pattern of spectral lines, and so a different flame color. Flame colors are produced from the movement of the electrons in the metal ions present in the compounds. For example, a sodium ion in an unexcited state has the electron configuration 1s²2s²2p⁶. When heated, the electrons gain energy and can be excited into any of the empty higher-energy orbitals—7s, 6p, 4d, or any other, depending on the amount of energ