Important Questions of Organic Chemistry – Some Basic Principles and Techniques Chemistry | Zigya

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211.

In qualitative analysis, NH4Cl is added before NH4OH

  • to increase [OH-] concentration

  • for making HCl

  • to decrease [OH-] concentration

  • Statment is wrong


212.

The geometrical and optical isomers of complex [Pt(NH3)(Br)(Cl)(Py)] respectively 

  • 2, 2

  • 0, 3

  • 2, 1

  • 3, 0


213.

Schiff's nitrometre is filled with

  • mercury

  • water over mercury seal

  • KOH solution over mercury seal

  • toulene over mercury seal


214.

Kjeldahl trap is

  • fitted over Kjeldahl flask

  • used to trap water vapours

  • used to trap ammonia

  • None of the above


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215.

The IUPAC name of the following compound is:

  • 3-methyl cyclohexene

  • 1-methyl cyclohex-2-ene

  • 6-methyl cyclohexene

  • 1-methyl cyclohex-5-ene


216.

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


217.

Among the following compound with the lowest pKa value is


218.

Which one of the following will most readily be dehydrated in acidic solution?


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219.

K2[HgI4] detects the following ion

  • Cl-

  • NO2-

  • NO3-

  • NH4+


220.

The IUPAC name of (CH3)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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