Chemistry:2008:CBSE:[All India]:Set-III
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Q1
What is the total number of atoms per unit cell in a face-centred cubic (fcc) crystal structure? Marks:1View AnswerAnswer:
Four -
Q2
Draw the structure of the compound whose IUPAC name is 4-Chloropentan-2-one. Marks:1View AnswerAnswer:
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Q3
Define the term vulcanisation. Marks:1View AnswerAnswer:
The process in which raw rubber is heated with sulphur at 373-415 K. It introduces sulphur bridges or cross links between polymer chains. -
Q4
Write the IUPAC name of the following compound: CH3 - O - CH2 - CH - CH2 - CH3
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CH3Marks:1View AnswerAnswer:
2-methyl-2-methoxybutane -
Q5
Describe ‘electrophoresis’ briefly. Marks:1View AnswerAnswer:
On applying electric potential across two Pt (platinum) electrodes dipping in a colloidal solution, the colloidal particles move towards on or the other electrode. The movement of colloidal particles under an applied electric potential is called electrophoresis. -
Q6
Which is a stronger acid in aqueous solutions, HF or HCl? Marks:1View AnswerAnswer:
HCl will be a stronger acid in aqueous solution due to the larger size of Cl atom as compared to that of F atom. -
Q7
Express the relation between the conductivity and the molar conductivity of a solution. Marks:1View AnswerAnswer:
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Q8
Write two main functions of carbohydrate in plants. Marks:1View AnswerAnswer:
The two main functions of carbohydrate in plants is given below.
(i)Building block of plant is cellulose, which is a kind of carbohydrate.
(ii)Food is stored in the plan in the form of carbohydrate (starch, glucose) -
Q9
Depict the galvanic cell in which the reaction 
takes place. Further indicate what are the carriers of the current inside and outside the cell. State the reaction at each electrode. Marks:2View AnswerAnswer:
The electrons are the carriers of the current inside and outside the cell. At anode:
At Cathode:
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Q10
The resistance of a conductivity cell containing 0.001 M KCl solution at 298 K is 1500 Ω. What is the cell constant if the conductivity of 0.001 M KCl solution at 298 K is 0.146 × 10-3 S cm-1?
Marks:2View AnswerAnswer:
