Multiple Choice QuestionsIn qualitative analysis, NH4Cl is added before NH4OH
to increase [OH-] concentration
for making HCl
to decrease [OH-] concentration
Statment is wrong
The geometrical and optical isomers of complex [Pt(NH3)(Br)(Cl)(Py)] respectively
2, 2
0, 3
2, 1
3, 0
Schiff's nitrometre is filled with
mercury
water over mercury seal
KOH solution over mercury seal
toulene over mercury seal
Kjeldahl trap is
fitted over Kjeldahl flask
used to trap water vapours
used to trap ammonia
None of the above
B.
used to trap water vapours
The Kjeldahl bulb or Kjeldahl trap between the digestion flask (Kjeldahl flask) and the condenser improves distillation efficiency by preventing carry ever of the alkaline digestion mixture and water vapours into the receiving flask and the large lower tube facilitates the return of any condensate to the digestion flask. The slightest bit of contaminated of the receiving solution can cause significant error in the titration step.
The condensate in the bulb/trap is maintained above pH 7 by the non-volatile alkali sucrubbed from the vapour and it is kept at or near the boiling point of passing steam. Under these conditions, no ammonia should be retained in the condensate of the Kjeldahl's trap.
The IUPAC name of the following compound is:
3-methyl cyclohexene
1-methyl cyclohex-2-ene
6-methyl cyclohexene
1-methyl cyclohex-5-ene
Which of the following does not exist?
I. HO3S-S-SO3H
II. HO-Te-OH
III. HS-S2-SH
IV. HS-Po-OH
Only II
Only III
II and IV
I, III and IV
The IUPAC name of (CH3)3 C-CH=CH2 is
1, 1, 1-trimethyl-2-propene
3, 3, 3-trimethyl-2-propene
2, 2-dimethyl-3-butene
3, 3-dimethyl-1-butene
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