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2.2016 gm of acetaldehyde produced 13.95 kcal of heat on combustion in $ O_2 $ . Calculate the heat of combustion of $ CH_3 CHO $
$ \triangle H = { 13.95 \times 44 \over 2.2016 } = 278.7 kcal $
Calculate equilibrium constant for a reaction $ 2 Br ^ {-1} + I_2 \rightleftharpoons 2 I ^ { -1} + Br_2 E ^ \circ _{cell} = -0.544 V $
When Sali cyclic acid is treated with acetic anhydride we get
Antiseptic chloroxylenol is
Which of the following is an insecticide
The number of hydroxide ions, produced by one molecule of sodium carbonate $ (Na_2CO_3)$ on hydrolysis is [Pb. CET 2002]
By passing $KMnO_4$ gas in acidified $H_2S$ solution, we get [MP PET 1997]
When potassium permanganate ($KMnO_4$) is passed through an acidified hydrogen sulfide ($H_2S$) solution, the $KMnO_4$ (a strong oxidizing agent) oxidizes the $H_2S$ to sulfur (S), while itself being reduced. The reaction is:
$2KMnO_4 + 3H_2SO_4 + 5H_2S → 2MnSO_4 + K_2SO_4 + 8H_2O + 5S$.
Therefore, the product formed is sulfur (S).
Which of the following doesn’t give a ppt. with silver nitrate solution. [J & K 2005]
When acetic acid and $K_4[Fe(CN)_6]$ is added to a copper salt, a chocolate precipitate is obtained of the compound
When acetic acid and potassium ferrocyanide (K4[Fe(CN)6]) are added to a copper salt, a chocolate precipitate of copper ferrocyanide (Cu2[Fe(CN)6]) is formed. This reaction is used in qualitative inorganic analysis to test for the presence of copper ions.
The compound insoluble in acetic acid is [CPMT 1989]
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