1sindoor:Pb3O4
These are few questions asked by external examiner in our school in chem viva:
1. Chem formula of Sindoor.
2. Compound used for cleaning earrings..
3. sag(spinach) me haldi (turmeric) kyun nahi dalte..
:D
[3]
me have chem pract on 7th feb.. any ideas what q to prepare.. [3]
-
UP 0 DOWN 0 0 28
28 Answers
111) Powdered red phosphorous
2) Cotton
3) If turmeric is added green colour will be bleached
[3][3][3][3][3][3][3][3][3]
13sindoor is not that poisonous...that it will kill you like KCN(don't try this at home) ...anirudh....[9]
but it is not that good for skin.....
3eureka my grandgrand mother lived for abt 98yrs
she used kumkum for abt more than 70yrs
this fact was told to me by my father da
24in older days it was poisonous dear.....thats why indian ladies had very short life span........but now it has been banned,,,,
11poisonous? But i've accidentally eaten sindoor many times before and i'm still alive..................yipeeeeee......I'm invisible...i mean......invincible[3]
13but sindoor available in market is nothing but α- mercuric sulfide and Lead tetroxide ......hence very poisonous ...[3]
11Arey yaar. I'm doing a chem project on turmeric powder. And i learnt that kumkum is prepared by mixing turmeric powder with slaked lime and then dried..........I don't remember the rest.
If u want to test, take some turmeric powder and add it to an alkaline solution, u'll get a red coloured solution[4]
131. Chem formula of Sindoor.
α- mercuric sulfide and Lead tetroxide
α-HgS and Pb3O4
11Most important question, HOTS (Higher Order Thinking Skills) in pracs:
Melody itni chocolatey kyun hai? [3]
11You wanna know formula of sindoor (KumKum)? Here goes
(1E,6E)-1,7-bis (4-hydroxy-3-methoxyphenyl) -1,6-heptadiene-3,5-dione
This dissolved in slaked lime (Ca(OH)2 )
1but tension mat lo viva ka .......sabko marks milta hai...(reputed skul ka naam kharab toh nahi karna hai na!!!!!)
padh lo thoda bahut...waise bhi tum toh "Tez" ho hi!!
1dese questions..... seems dat his wife might b asking him.....day and night..or is he a she??[7]
33exteral examiner fought wid skul teachers and badla le raha humloig se
1it depends on the external examiner...........ur teacher must hv told wt to do jst do tht properly
12.) i think, some soln which is higher to gold [assuming that the earing is of gold [3] ] in the reactivity series .
11something similar but much worser
my skul physics teacher asked us to remember the values we should get for the experiments and just write them out
no need to do the pracs just act like doin them