Ferrous oxide has a cubic structure with an edge length of the unit cell equal to 5.0 Å. Assuming the density of ferrous oxide to be 3.84 g cm⁻³, the number of Fe²⁺ and O²⁻ ions present in each unit cell will be respectively, (use NA=6×10²³)

1) 4 and 4
2) 2 and 2
3) 1 and 1
4) 3 and 4

In the given reaction $$\displaystyle CH_{3}-CH_{2}-COOH\xrightarrow[\left ( ii \right )Br_{2}/\Delta ]{\left ( i \right )AgNO_{3}}\left [ X \right ]$$, $$\displaystyle \left [ X \right ]$$ will be :

1) propyl bromide
2) propyl propanoate
3) ethyl bromide
4) none

Which one of the following is an extensive property?

1) Molarity
2) molar volume
3) mole fraction
4) number of moles

Assertion

Phenol reacts with CH₃I in presence of NaOH to form methoxybenzene.

Reason

Phenoxide is better nucleophile than phenol.

1) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2) Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3) Assertion is correct but Reason is incorrect
4) Both Assertion and Reason are incorrect

Which of the following compounds does not undergo nucleophilic substitution
reaction ?

1) ethyl bromide
2) vinyl chloride
3) isopropyl chloride
4) benzyl chloride

The value of observed and calculate molecular weights of silver nitrate are 92.64 and 170 respectively. The degree of dissociation of silver nitrate will be :

1) 60%
2) 83.5%
3) 85.3%
4) 41.6%

The hardness of water is estimated by

1)  distillation method

2)  titrimetric method

3)  EDTA method

4)  conductivity method

The number of optical isomers formed by hydrogenation of the compound, (CH₃)₂C = CHCH₃ are

1) 1
2) 2
3) 3
4) zero

In a mixture, two enantiomers are found to be present in 85% and 15% respectively. The enantiomeric excess (e,e′) is :

1) 85 %

2) 15 %

3) 70 %

4) 60 %

The edge length of the unit cell of NaCl crystal lattice is 552 pm. If the ionic radius of sodium ion is 95 pm., what is the ionic radius of chloride ion ?

1) 368 pm
2) 190 pm
3) 276 pm
4) 181 pm