Aniline on heating with conc. `HNO_(3)+` conc. `H_(2)SO_(4)` mixture yields
A. `o-`and p-Nitoanilines
B. `m-`Nitroaniline
C. A black tarry matter
D. No reaction
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If `H_(2)SO_(4)` ionises as `H_(2)SO_(4) + 2H_(2)O to 2H_(3)O^(+) + SO_(4)`. Then total number of ions produced by `0*1 MH_(2)SO_(4)` will be
Correct Answer - D 1 M produces ions `= 3` moles `:. 0*1` M `H_(2)SO_(4)` produces ions `=0*3` mol No. of ions `=0*3xx6*02xx10^(23)=1*8xx10^(23)`
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Nitrobenzene can be prepared from benzene by using a mixture of conc. `HNO_3` and conc. In the nitrating mixture, `HNO_3` acts as a/an
Correct Answer - A `HNO_(3)` acts as a base as it provides p-nitrophenol. `HNO_(3) Leftrightarrow H^(+)+HSO_(4)` `O_(2)N-OH+H^(+) to NO_(2)^(+)+H_(2)O`
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Which of the following is obtained when aniline is treated with conc. `HNO_(3)` ?
Correct Answer - D Direct treatement of aniline `(1^(@)" Amine")` without protecting `-NH_(2)` group with conc. `HNO_(3)` redults in the black tarry mixture of many oxidation products.
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In the reaction of benzene with a mixture of conc. `HNO_(3)` and conc. `H_(2)SO_(4)`, the active species involved is
Correct Answer - C In nitration of benzene, the reactive species in - volved is nitronium ion `(NO_(2)^(+))`.
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Nitrobenzene can be prepared from benzene by using a mixture of conc. `HNO_(3)` and conc. `H_(2)SO_(4)`. In the nitrating mixture, nitric acid acts as
Correct Answer - A `HNO_(3)+H_(2)SO_(4) rarr NO_(2)^(+)+HSO_(4)^(-)+H_(2)O` In this reaction nitric acid acts like a base.
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Mononitration of aniline yields a mixture of three isomeric nitroanilines. The yield of these isomeric nitroanilines is in the order
Correct Answer - D Yields of three isomeric nitroanilines are in the order `p(51%) gt m (47%) gt o (2%)` Large yields of m-nitroaniline is due to the fact that aniline...
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Zinc reacts with dilute `H_(2)SO_(4)` to give `H_(2)`. It also reacts with conc. `H_(2)SO_(4)` to give `SO_(2)` . How will you account for this differ
Dilute `H_(2)SO_(4)` behaves as a proton acid and zinc metal displaces hydrogen from the acid. `Zn+H_(2)SO_(4)("dil")to ZnSO_(4)+H_(2)` Concentrated `H_(2)O_(4)` behaves as a strong oxidising agent and itself is reduced to...
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A metal `M` which is not affected by strong acids like conc. `HNO_(3),conc.H_(2)SO_(4)` and conc. Solution of alkalies like `NaOH,KOH` forms `MCI_(3)`
Correct Answer - C `Au to` Noble metal `&` it is used in tonning for photography.
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`SO_(3) (g)` is produced as : `SO_(2) (g) + (1)/(2) O_(2) (g) hArr SO_(3) (g)` At `900 K, 0.2 `mol of `SO_(2)` and 0.4 mol of `O_(2)` are taken in 2L
Correct Answer - C `{:(,SO_(2) (g),+,(1)/(2)O_(2) (g),hArr,SO_(3) (g),T = 900 K,),("Concentration",(0.2)/(2),,(0.4)/(2),,,,),("initially",,,,,,,),("concentration",0.1 - x,,0.2 - (1)/(2) x,,x,,),(,x = 0.08 M,,,,,,),(,,,,,,,):}` `K_(C) = ([SO_(3)])/([SO_(2)] [O_(2)]^(1//2)) = (0.08)/(sqrt(0.16) xx 0.02) = 10`
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Cancerntrated `HNO_(3)` used in the laboratory is usually 69% by mass of `HNO_(3)`. The density of `HNO_(3)`. The density of `HNO_(3)` solution is 1`.
Correct Answer - 15.44 M `"Mass of solution"= 100 g, "Mass os "HNO_(3)=69 g` `"Volume of solution"=(100 g)//(1.41" g cm"^(-3))=70.92 cm^(3)=0.07092 dm^(3)` `"Molar mass of "HNO_(3)=1 +14 +3xx16=63" g mol"^(-1)` `"Molarity...
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