CBSE Class 12 Mathematics Question Paper 2026 Available- Download PDF with Solutions

CBSE CLASS XII Questions

• 1.

  According to Werner's theory, the primary valencies of the central metal atom :

  • are satisfied by neutral molecules or negative ions.
  • are equal to its coordination number.
  • are satisfied by negative ions.
  • are non-ionisable.
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• 2.

  Which of the following transition metals shows +1 and +2 oxidation states ?

  • Mn
  • Zn
  • Cu
  • Sc
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• 3.

  In an economy, exclusion of _______ may lead to under estimation of the value of Gross Domestic Product (GDP). 
   

  • Barter Transactions
    
  • Services provided by family members
    
  • Illegal activities
    
  • Depreciation of Assets
    
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• 4.

  Which of the following product is formed when salicylic acid is treated with (CH₃CO)₂O in the presence of acid ?

  • o-C₆H₄(COOCH₃)(OH) — methyl 2-hydroxybenzoate
  • o-C₆H₄(OCOCH₃)(OH)
  • o-C₆H₄(COCH₃)(COOH)
  • o-C₆H₄(OCOCH₃)(COOH) — aspirin (acetylsalicylic acid)
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• 5.

  Consider the following compounds : Chlorobenzene (I), 2,4,6-trinitrochlorobenzene (II), 2,4-dinitrochlorobenzene (III), 4-nitrochlorobenzene (IV). The correct order of increasing ease of nucleophilic substitution reactions of these compounds is :

  • I < IV < III < II
  • I < III < IV < II
  • II < III < IV < I
  • IV < III < II < I
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• 6.

  Which reagent is used to distinguish between primary, secondary and tertiary amines ?

  • C₆H₅SO₂Cl
  • C₆H₅COCl
  • CHCl₃ + ethanolic KOH
  • NaOH + I₂
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