CBSE Set Q1 Chemistry Sample Test Papers For Class 12th for students online

Q3) Write the IUPAC name of [Ni(CN)₄]^2- ion. (Marks 1)

Q4) Write the IUPAC name of : (Marks 1)

O            CH3CCHCH3                                       CH3

Q6) Complete the nuclear reaction expression : (Marks 1)
 ₁₃AI²⁷(,n).... 

Q9) Why do azo dyes not impart fast colour to fabrics?  (Marks 1)

Q11) Calculate the cell potential of the given cell at 25^oC. ( R = 8.31 JK^-1 mol^-1 F = 96500 C mol^-1)
Ni(s) | Ni²⁺ (0.01 M) || Cu²⁺ (0.1 M) | Cu(s)
[Given E^o_Cu²⁺_/Cu = +0.34 V ; E^o_Ni²⁺_/Ni = -0.25 V]  (Marks 2)

Q16) The half-life of C-14 is 5600 years. A sample of freshly cut wood from a tree contains 10 mg of C-14. How much C-14 will remain in the wood sample after 56,000 years? (Marks 2)

Q17) Illustrate elevation in boiling point with the help of vapour pressure - temperature curve of a solution. Show that elevation in boiling point is a colligative property.  (Marks 2)

Q22) How is XeO₃ obtained ? Write the related chemical equations. Draw the structure of XeO₃.  (Marks 2)

Q26) How are the following conversions carried out?
(i) Acetic acid to methylamine
(ii) Acetaldehyde to methane
Write reactants and reaction conditions.  (Marks 2)

Q30) A solution of sucrose (molar mass = 342 g) has been prepared by dissolving 68.4 g of sucrose in one kg of water. Calculate the following :
(i) the vapour pressure of the solution at 298 K,
(ii) osmotic pressure of the solution at 298 K,
(iii) freezing point of the solution.
[ Given : vapour pressure of water at 298 K = 0.024 atm., K_f for water = 1.86 K kg mol^-1 R = 0.082 L atm mol^-1 K ] (Marks 3)

Q31) (a) Write the balanced equations for the following reactions :
(i) B₂H₆ + NaH
(ii) XeF₆ + NaF
(b) Discuss two similar and two dissimilar properties from the chemistry of nitrogen and that of phosphorus.  (Marks 3)