VITEEE 2017 :: Chemistry :: General questions

• Chemistry - General questions

A compound is soluble in conc. H₂SO₄. It does not decolourise bromine in carbon tetrachloride but is oxidised by chromic anhydride in aqueous sulphuric acid within two seconds, turning orange solution to blue, green and then opaque. The original compound is

Answer:

Explanation:

Solubility of the compound in conc.H₂SO₄ indicates that it can be an alkene, alcohol or ether. The inability to discharge bromine colour indicates the absence of an alkene. Hence. the compound is alcohol which should be primary because it is readily (within 2 seconds) oxidised byCrO₃ in sulphuric acid.

The number of geometrical isomers of CH₃CH=CH-CH=CH-CH=CHCl is

Answer:

Explanation:

The given structure has three double bonds whose each carbon atom is differently substituted hence number of geometrical isomers will be 2ⁿ = 2³ = 8, where n is the number of double bonds whose each carbon atom is differently substituted.

Which of the following oxy-acids has the maximum number of hydrogens directly attached to phosphorus?

Answer:

Explanation:

What is Z in the following sequence of reactions?

$Phenol\xrightarrow[{dust}]{Zn}X\xrightarrow[{Anhyd.AlCl_{3}}]{CH_{3}Cl}Y\xrightarrow[{KMnO_{4}}]{Alkaline}Z$

Answer:

Explanation:

A compound M_pX_q has cubic close packing (ccp) arrangement of X.Its unit cell structure is shown below. The empirical formula of the compound is

Answer:

Explanation:

No. of M atoms = 1/4×4+1=1+1=2

No. of X atoms =  1/2 × 6+1/8×8 = 3+1 = 4

So formula = M₂X₄ = MX₂

• Chemistry - General questions