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Name the four bases present in DNA. Whic...

Name the four bases present in DNA. Which one of these is not present in RNA ?

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**Step-by-Step Solution:** 1. **Identify the Four Bases of DNA:** - The four nitrogenous bases present in DNA are: - Adenine (A) - Thymine (T) - Cytosine (C) - Guanine (G) ...
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XII BOARD PREVIOUS YEAR PAPER ENGLISH-XII BOARDS-[SET-I]
  1. Which one in the following pairs undergoes S(N)1 substitution reactio...

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  2. Complete the follwing reaction equations : (i) (ii) CH(3)CH...

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  3. Name the four bases present in DNA. Which one of these is not present ...

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  4. Name two fat soluble vitamins, their sources and the diseases caused d...

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  5. Differentiate between the molecular structures and behaviour of thermo...

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  6. A first order reaction has a rate constant of 0.0051 min^(-1). If we b...

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  7. Silver crystallises with face - centred cubic unit cells .each side of...

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  8. A copper-silver cell is set up. The copper ion concentration in it is ...

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  9. Whate happens in the following activities and why? (i) An electrol...

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  10. Give a suitable example for each, explain the following : (i) Crysta...

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  11. Explain the following complexes with respect to structural shapes of u...

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  12. Classify the following as primary ,secondary and tertiary alcohols : ...

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  13. How would you account for the following : (i) The metallic radii of ...

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  14. Complete the following reaction equations: (i) R-overset(O)over...

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  15. Describe the following substance with one suitable expample of each t...

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  16. (a) Define the following terms: (i) Mole fraction (ii) Van't Hoff fa...

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  17. (a) What is meant by: (i) Colligative properties (ii)Molality of a sol...

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  18. Draw the structures of the following : (i) H(2)S(2)O(8) (ii...

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  19. Explain the following observation : In the structure of HNO(3) ...

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  20. Write chemical equations to illustrate the following name bearing reac...

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