Class 11th

This is a Matching Type Questions as classified in NCERT Exemplar

59.  (i) → (a); (ii) → (b); (iii) → (b) : (iv) → (c)

This is a short answer type question as classified in NCERT Exemplar

These two elements have similar properties because of their similar atomic and ionic radii.

(i) Both are lighter element and harder than the other metals in their respective groups.

(ii) The halides of both elements, LiCl and MgCl₂ are soluble in ethanol.

This is a Matching Type Questions as classified in NCERT Exemplar

58. (i) →   (a); (ii) →   (a); (iii) →   (b)

This is a short answer type question as classified in NCERT Exemplar

(i) O₂²⁻+ 2H₂O → H₂O₂+2OH⁻

(ii) 2O₂⁻+2H₂O→2OH⁻+H₂O₂+O₂

vvvvvvvvvvvvvvvvv

This is a Matching Type Questions as classified in NCERT Exemplar

57. (i) → (c); (ii) → (f); (iii) → (b) : (iv) → (a); (v) → (d) ; (vi) → (e)

This is a short answer type question as classified in NCERT Exemplar

Alkali metals forms oxide when reacted with air. Lithium forms monoxide, sodium forms peroxide and potassium forms superoxide.

4Li+O₂→2Li₂O

Na+O₂→Na₂O₂

 K+O₂→KO₂

This is a short answer type question as classified in NCERT Exemplar

Lithium has the highest negative reduction potential value. Due to the small size of lithium it has the highest ionization enthalpy. Due to this, the reducing power of lithium is the highest in an aqueous solution.

This is a Matching Type Questions as classified in NCERT Exemplar

56.  (i) → (e); (ii) → (d); (iii) → (a) : (iv) → (b); (v) → (c)

This is a Multiple Choice Questions as classified in NCERT Exemplar

55. Options (i) and (ii) are correct since hyperconjugation involves the delocalization of electrons of C—H bond of an alkyl group directly attached to an atom of unsaturated system or to an atom with an unshared p-orbital. The electrons of C—H bond of the alkyl group enter into partial conjugation with the attached unsaturated system or with the unshared p-orbital. This is a permanent effect. Hyperconjugation can be shown as-