Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

61.
Complete the following reaction equation:
$straight R subscript 2 SiCl subscript 2 space plus space straight H subscript 2 straight O space rightwards arrow$

167 Views

Long Answer Type

62. How do elements of group 13 occur in nature?

229 Views

63.

Discuss the characteristics of group 13 elements in terms of:
(i) Atomic and ionic radii
(ii) ionisation enthalpy
(iii) Density, melting point and boiling points.

698 Views

Short Answer Type

64.

How would you explain the lower atomic radius of Ga as compared to Al ?

336 Views

Long Answer Type

65. Discuss the characteristics of group 13 elements in terms of :
(i) Electronegativity
(ii) Nature of bonds
(iii) Oxidation states.

502 Views

66.

Explain the following:
(i) Boron is trivalent
(ii) Boron and aluminium tend to form covalent compounds.

588 Views

67.

Discuss the pattern of variation in the oxidation states of B(Boron) to Tl(Thallium).
Or
What is inert pair effect? Illustrate it with reference to Boron family.

609 Views

Short Answer Type

68.

How can you explain the higher stability of BCl₃ as compared to TlCl₃?

586 Views

69.

Standard electrode potential values $straight E to the power of circled dash space for space Al to the power of 3 plus end exponent divided by Al space is space minus 1.66 straight V$ and that of $Tl to the power of 3 plus end exponent divided by Tl$ is +1.26 V. Predict about the formation of M³⁺ ion in solution and compare the electropositive character of the two metals.