The ethyl borate obtained in reaction 2 imparts green edged flame indicating the presence of borate. Therefore, option B is the correct answer. -Option C is "Methyl borax".

Borax when heated with ethyl alcohol and concentrated H 2 SO 4, produces volatile vapours of triethyl borate, which burns with green edged flame. \[\ce{\underset{Borax}{Na2B4O7} + \underset{(conc.)}{H2SO4} + 5H2O ->[\Delta]\underset{Sodium sulphate}{Na2SO4} + \underset{Orthoboric acid}{4H3BO3}}\]

When borax is heated with ethanol and conc. H 2 S O 4, vapours of triethyl borate are produced that burn with a green edged flame. This green edged flame test for testing B O 3 − 3 radical is written as follows: N a 2 B 4 O 7 + H 2 S O 4 + 5 H 2 O → N a 2 S O 4 + 4 H 3 B O 3 H 3 B O 3 + C 2 H 5 O H → (C 2 H 5) 3 B O 3 + 3 H 2 O Triethyl ...

Es­ters of boric acid burn with a green flame, and this prop­er­ty is used in an­a­lyt­i­cal chem­istry for de­tect­ing boric acid and its salts. Pure es­ters of boric acid burn at a tem­per­a­ture of around 30 °С, so you can safe­ly put your hand in the flame.

On heating borax with ethanol and concentrated H 2 SO 4, vapors of triethylborate are produced. These vapors burn with a green edged flame on ignition. The compound triethylborate (C 2 H 5) 3 BO 3 is responsible for the green edged flame in the test for borate ion. Silicate. Silicate is the general term given to solids with silicon-oxygen bonds.

Feb 4, 2021 · Boric acid imparts a pale green color to a flame. A very pale green color is imparted to the flame by boron in boric acid. A few tinges of yellow-orange sodium color appear as a consequence of traces of sodium impurity in the boric acid solution.

When boric acid or borate salt is heated with ethyl alcohol in presence of concentrated H 2 SO 4, an ester triethyl borate is formed. The Vapour of this ester burns with a green-edged flame and this reaction is used to identify the presence of borate.

Jul 3, 2023 · On heating borax with ethyl alcohol and concentrated sulphuric acid , vapours of triethylborates are produced. When ignited these vapours burn with a green edged flame. Na 2 B 4 O 7 + H 2 SO 4 +5 H 2 O ———-> Na 2 SO 4 + 4 H 2 BO 3. H 3 BO 3 + 3 C 2 H 5 OH ——-> B(OC 2 H 5) 3 + 3 H 2 O. Uses of Borax. Borax is used in: 1) in the ...

Borax when heated with ethyl alcohol and concentrated H2SO4, produces volatile vapours of triethyl borate, which bum with green edged flame. ii. The above reaction is Used as a test for the detection and removal of borate radical (BO3− 3) (B O 3 3 −) in qualitative analysis.

Nov 9, 2020 · When borax is heated with ethanol and conc. H2SO4, vapours of triethyl borate are produced that burn with a green edged flame. This green edged flame test for testing BO33− radical is written as follows: Na2B4O7+H2SO4+5H2O→Na2SO4+4H3BO3.