21.

When one litre one molar sulphuric acid solution is diluted with 5 L water, the normality of the obtained solution is

• 0.2 N

• 0.33 N

• 10 N

• 5 N

The normality of 10 L volume H₂O₂ is

• 0.176

• 0.88

• 1.78

• 3.52

If a species has 16 protons, 18 electrons and 16 neutrons, the symbol (with charge) of species is

• S^-

• Si^2-

• P^3-

• S^2-

When borax is heated strongly, it gives

• BaBO₂

• B₂O₃

• B₃N₃H₆

• Na₂B₄O₇

CH₃CH₂CH(OH)CH₃ and CH₃(CH₂)₂CH₂OH can be distinguished by

• Lucas test

• Iodoform test

• Victor-Meyer's test

• All of the above

The IUPAC name of 

• bicyclo (5.5.0) nonane

• biphenyl

• spiro (3.5) nonane

• cyclobutyl cyclohexane

The compound which does not exhibit geometrical isomerism, is

• CH₃CH=CHCOOH

• Br-CH=CH-Br

• C₆H₅CH=NOH

• 

Which of the following is the most reactlve towards ring nitration ?

• benzene

• toulene

• m-xylene

• mesitylene

An alkene having molecular formula, C₆H₁₀ gives  OHC(CH₂)₄CHO, on ozonolysis. The alkene is

• hexene-1

• hexene-2

• cyclohexene

• 1-methylcyclohexene-1

When petroleum is heated gradually, the first batch of vapours evolved will be rich in

• kerosene oil

• diesel oil

• lubricating oil

• petroleum ether