Chemistry:2003:CBSE:[Delhi]:Set-I
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Q1
Write all the four quantum numbers of the electron in the outermost shell of rubidium (Atomic no.=37). Marks:1View AnswerAnswer:
Question not in syllabus. -
Q2
What type of hybridisation is associated with N in NH3? What is the expected bond angle in NH3? Marks:1View AnswerAnswer:
Hybridisation associated with N in NH3 is sp3. The expected bond angle in NH3 109.28º -
Q3
Mention one property which is caused due to presence of F-centre in the solid. Marks:1View AnswerAnswer:
The solids having F-centres become coloured. -
Q4
Write Nernst equation for single electrode potential. Marks:1View AnswerAnswer:
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Q5
Comlpete the nuclear equation out of syllabus 41H1 + 4He2 → Marks:1View AnswerAnswer:
Not in the XII syllabus. -
Q6
How does chemical adsorption of a gas on solid vary with temperature? Marks:1View AnswerAnswer:
The rate of chemical adsorption decreases with increase in temperature. -
Q7
Mention the chief reasons for the anomalous behaviour of lithium in group 1 of the periodic table. out of syllabus Marks:1View AnswerAnswer:
This question is not in 2007-2008 syllabus. -
Q8
Why is the third ionization energy of manganese (Atomic no.= 25) unexpectedly high? Marks:1View AnswerAnswer:
Mn (Ground state); 1s2, 2s2, 2p6,3s2, 3p6 ,4s2, 3d5.After the loss of two electrons it becomes Mn2+ having configuration 1s2, 2s2, 2p6,3s2, 3p6 ,4s0, 3d5.It is extra stable due to exactly half filled 3d orbital, as a result third ionisation energy of manganese is unexpectedly high. -
Q9
Write IUPAC name of the complex Na3[Cr(OH)2F4]. Marks:1View AnswerAnswer:
Sodiumtetrafluorodihydroxochromate(III) -
Q10
Mention two main functions of lipid. Marks:1View AnswerAnswer:
Not in the XII syllabus.
