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XII BOARDS PREVIOUS YEAR-XII BOARDS-C.B.S.E. CLASS - XII
- Define the following terms " (i) n-type semiconductor. (ii) Ferrim...
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- What is osmotic pressure ? Why it is a colligative property ?
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- Draw the structural formulae of molecules of following compounds : (...
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- Give reason: (i) Transition metals show variable oxidation states. ...
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- Write the definitions of the following : (i) Racemic mixture (ii) ...
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- If NaCl is doped with 10^(-3) mol% of SrCl(2), what is the concentrati...
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- Calculate the mass of a non-volatile solute ( molecular mass 40) which...
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- If the half-life period of a first order reaction in A is 2 minutes, h...
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- What are emulsions ? What are their different types ? Give an example ...
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- Describe the following: (i) Role of depressant in forth floatation p...
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- In the 3d series (Sc = 21 to Zn = 30) : (i) Which elements shows max...
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- Write the hybridization and magnetic character of the following comple...
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- In the following pairs of the halogen compounds which compounds underg...
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- How are the following conversions carried out ? i. Propene rarr Pro...
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- Write the main products of the following reactions: (i) C(6)H(5)N(2)...
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- Describe a method for the identification of primary , secondary and te...
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- Write two uses of each of the following polymers. "(i) Polypropylene...
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- Defines the following as related to proteins: (i)Peptide linkage, (i...
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- Ms. Kirti was pursuing her studies in medicine at Bangalore. When she ...
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- Define the following : (i) Molar conductivity (ii) Fuel cell (b)...
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