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Chemistry can prove to be a blessing or ...

Chemistry can prove to be a blessing or a curse depends upon the uses to which it is put. Comment.

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Knowledge Check

  • Use of diamond as a gem depends upon its

    A
    High cost
    B
    Refraction index
    C
    Extreme hardness
    D
    Bad conductance

  • Rate at which a substance reacts depends upon its

    A
    atomic weight
    B
    equivalent weight
    C
    molecular weight
    D
    active mass.

  • Pitch is sensation which depends upon

    A
    frequency
    B
    amplitude
    C
    wavelength
    D
    velocity
    • PRADEEP-SOME BASIC CONCEPTS OF CHEMISTRY-ADDITIONAL QUESTIONS (SHORT ANSWER QUESTIONS)
    1. Chemistry can prove to be a blessing or a curse depends upon the uses ...

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    2. Give examples of homogeneous mixture in different physical states (two...

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    3. Define element compound and mixture

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    4. Classify the following as pure substances or mixtures. Separate the pu...

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    5. Give three main points of difference between a compound and a mixture.

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    6. What does symbol SI signify ? Name the seven basic SI units ?

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    7. Define precision and accuracy.

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    8. What do you mean by significant figures?

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    9. Under what conditions the zeros in a number are significant ?

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    10. What do you understand by unit conversion factor ? How does it help to...

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    11. After rounding off 1.235 and 1.225, we will have their answer respecti...

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    12. Give one experiment involving a chemical reaction to prove that the la...

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    13. Copper oxide obtained by heating copper carbonate or copper nitrate co...

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    14. N and O combine with H to form NH(3) and H(2)O and they combine with e...

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    15. Define Gay Lussac's law of gaseous volume. Explain with one suitable e...

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    16. What are the postulates of Modern Atomic Theory?

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    17. Which isotope is used as a reference on the atomic scale ? What is one...

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    18. Why atomic mass is an average value ? Explain with suitable example.

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    19. How is mole related to (i) mass, (ii) volume and (iii) number of mol...

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    20. What is the SI definition of mole?

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