Chemistry NEET Daily MCQs Practice Questions | 1 August, 2024

Assertion and Reason, both are correct and Reason correctly explain the Assertion.

Assertion and Reason, both are correct but Reason does not explain Assertion correctly.

Assertion is correct, reason is incorrect.

Assertion is incorrect, reason is correct.

It liberates CO₂ on reaction with NaHCO₃

It does not undergo Friedel-Crafts reaction.

It forms acetal on reaction with ethylene glycol in presence of dry HCl.

It gives benzyl alcohol on reaction with B₂H₆ followed by hydrolysis.

a-p, b-q, c-r, d-s 

a-q, b-p, c-r, d-s

a-s, b-r, c-p, d-q 

a-s, b-r, c-q, d-p

3-Hydroxy benzoic acid

2-Hydroxy benzoic acid

4-Hydroxy benzoic acid

2-Hydroxy benzaldehyde

Diazonium salts are very good intermediates for introduction of –X, –CN, –OH, –NO₂ group in benzene ring.

Cl^Θ , Br^Θ and CN^Θ nucleophiles can be easily introduced in the benzene ring in presence of Cu(I) and reaction is known as Sandmeyer reaction.

Ethanol oxidises diazonium salts to Arenes and itselfs get reduced to ethanal.

All

C₂H₄O

C₄H₁₀O

C₃H₈O

CH₂O

$\stackrel{\oplus }{\mathrm{C}}{\mathrm{H}}_3>{\mathrm{CH}}_3-\stackrel{\oplus }{\mathrm{C}}{\mathrm{H}}_2$

${\mathrm{CH}}_3-\stackrel{\oplus }{\mathrm{C}}\mathrm{H}-{\mathrm{CH}}_2-{\mathrm{CH}}_3>{\mathrm{CH}}_3-\stackrel{\oplus }{\mathrm{C}}\mathrm{H}-{\mathrm{CH}}_3$

${\mathrm{CH}}_3-\mathrm{O}-\stackrel{\oplus }{\mathrm{C}}{\mathrm{H}}_2>{\mathrm{CH}}_3-\stackrel{\oplus }{\mathrm{C}}{\mathrm{H}}_2$

${\mathrm{CH}}_3-{\mathrm{CH}}_2-\stackrel{\oplus }{\mathrm{C}}{\mathrm{H}}_2>{\mathrm{CD}}_3-{\mathrm{CH}}_2-\stackrel{\oplus }{\mathrm{C}}{\mathrm{H}}_2$

17.5 

18.5

19.5 

20.5

${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{COONa}\stackrel{\mathrm{Electrolysis}}{\to }$

${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{COONa}\stackrel{\mathrm{sodalime}}{\to }$

${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{Cl}\underset{\mathrm{Dry} \mathrm{Ether}}{\overset{\mathrm{Na}}{\to }}$

${\mathrm{CH}}_3-{\mathrm{CH}}_2-\mathrm{OH}\underset{170°\mathrm{C}}{\overset{\mathrm{conc}. {\mathrm{H}}_2{\mathrm{SO}}_4}{\to }}$

(a)→(iv), (b)→(ii), (c)→(iii), (d)→(i)

(a)→(ii), (b)→(iv), (c)→(i), (d)→(iii)

 (a)→(i), (b)→(ii), (c)→(iii), (d)→(iv)

(a)→(ii), (b)→(iv), (c)→(iii), (d)→(i)

All are silvery in appearance.

These are highly reactive metals.

HCl reacts with all actinoids.

All actinoids react with alkalies.

Mangnate and permanganate ions are tetrahedral.

Both manganate and permanganate ions are paramagnetic.

In manganate ion, π-bonding takes place by overlap of p-orbitals of oxygen with d-orbitals of manganese.

Permanganate ion is purple in colour.

XeOF₄

XeO₃

XeO₂F₂

Both (1) and (3)