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Which of the following is the best scientific method to test the presence of water in liquid ?
A. Use of anhydrous copper sulphate
B. Use of litmus paper
C. Taste
D. Smell

Suggest the suitable name of the following compound.
`CH_(2)=CH-OH`
A. Viny alcohol
B. Hydroxy ethene
C. Hydroxy ethylene
D. Ethene `-2-`ol

The correct `IUPAC` name of the compound is
image
A. `4-`Bromo`-1-`chloro`-2-`fluoroiodomethylbutene
B. `4-`Bromo`-2-`chloromethyl`-1-`fluoro`-1-`iodbut `-1-`ene
C. `2-(2-`Bromoethyl`)-3-`chloro`-1-`fluoro`-1-`iodoprop`-1-`ene
D. `1-`Bromo`-3-`chloromethyl`-4-`fluoro`-4-`iodobut`-1-`ene

The label of a bromobutanoic acid bottle has been washed away. Someone is trying to relabel it with correct `IUPAC` name. Whih of the following cannot be a name ?
A. `2-`bromobutanoic acid
B. `3-`bromobutanoic acid
C. `4-`bromobutanoic acid
D. `1-`bromo`-3-`butanoic acid

Name of the compound given below is
image
A. `5-`ethyl`-6-`methyloctane
B. `4-`ethyl`-3-`methylocatane
C. `3-`methyl`-4-`ethyloctane
D. `2,3-`diethylheptane

In the estimation of sulphur organic compound on treating with conc. `HNO_(3)` is converted to
A. `SO_(2)`
B. `H_(2)S`
C. `H_(2)SO_(4)`
D. `SO_(3)`

Assertion `:` Refining of petroleum involves fractional distillation.
Reason `:` Fractional distillation involves repeated distillation.
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both the assertion and reason are true but the reason is not the correct explanation of assertion.
C. If the assertion is true but reason is false.
D. If assertion is false but reason is true.

Assertion `:` Potassium can be used in Lassaigne test.
Reason `:` Potassium reacts vigorously.
A. If both the assertion and reason are true and reason is the true explanation of the assertion .
B. If both the assertion and reason are true bu the reason is not the correct explanation of assertion.
C. If the assertion is true but reason is false.
D. If assertion is false but reason is true.

Chromatography is a valuable method for the separation, isolation, purification and identification of the constituents of a misture and it is based on general principle of
A. Phase rule
B. Phase distribution
C. Interphase separation
D. Phase operation

The structure of allyl viny thioether is
A. `CH_(2)=CH-CH_(2)-S-CH_(2)-CH=CH_(2)`
B. `CH_(2)=CH_S-CH_(2)-CH=CH_(2)`
C. `CH_(2)=CH-S-CH=CH_(2)`
D. None of these

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