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When do zeros present in a number become...

When do zeros present in a number become insignificant ?

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The zeroes written to the left of the first non-zero digit in a number are insignificant. For example, in the number 0.014, both the zeros are insignigicant.
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Knowledge Check

  • Statement-1: As the temperature decreases, the electrical resistivity in metallic conductors diminishes. Statement-2: Thermal oscillations of atoms which hinder motion of free electrons under the influences of an external electric field become insignificant as the temperature decreases.

    A
    Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.
    B
    Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.
    C
    Statement-1 is true, statement-2 is false.
    D
    Statement -1 is false, statement -2 is true.

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    B
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    C
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    D
    trans 1,2-dichloroethene

  • A bill presented in Parliament becomes an Act after

    A
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    The President has given his assent
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    The Prime Minister has signed it
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    The Suprme Court has declare it to be within the competence of Union Parliament
    • DINESH PUBLICATION-MOLE CONCEPT-Concept Based Question
    1. When do zeros present in a number become insignificant ?

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    2. Is velocity a basic or derived quantity according to S.I system ?

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    3. Which is more precise measurement of the length of a thread (i) 10.0 c...

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    4. Why do we regard the gaseous state of water as vapours while that of a...

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    5. Why is distilled water a compound while tap water a mixture ?

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    6. Mixture of salt and water is a solution while that of oil and water is...

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    7. When is the law of definite proportions not obeyed ?

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    8. Which law co-relates the mass and volume of a gas ?

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    9. Atomic mass of oxygen is 16 u. What does it indicant ?

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    10. An element has fractional atomic mass. What does it indicate ?

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    11. What is the difference between the mass of a molecule and molecular ma...

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    12. Where do we use the words mole and mol ?

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    13. Does one gram mole of a gas occupy 22.4 L under all conditions of temp...

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    14. What is the basic difference between empirical and molecular formulae ...

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    15. The percentages of all the elements present in a compound are 92. What...

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    16. Whay is it necessary to balance a chemical equation ?

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    17. In the combustion of methane, why is methane regarded s the limiting r...

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    18. Distinguish between molarity and molality.

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    19. Is the number of molecules in one mole of a gas at 100^(@)C and 500 m...

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    20. Are 0.5 mole of NaOH and 0.5 M of NaOH solution same ?

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