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In which of the following numbers all ze...

In which of the following numbers all zeros are significant ?

A

0.0007

B

0.007

C

70

D

0.7

Text Solution

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The correct Answer is:
C
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AAKASH INSTITUTE-SOME BASIC CONCEPTS OF CHEMISTRY -ASSIGNMENT SECTION A (Objective Type Questions (One option is correct))
  1. The number of significant figures in 0.0035 is

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  2. Atomic weight of chlorine is 35.5 . It has two isotopes of atomic weig...

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  3. In which of the following numbers all zeros are significant ?

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  4. The prefix atto stands for

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  5. Which one of the following is not an element ?

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  6. Which one of the following statements is correct ?

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  7. Which one of the following statements is false ?

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  8. A balanced chemical equation is in accordance with

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  9. When pentane , C(5) H(12) is burned in excess oxygen , the products of...

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  10. Which one of the following best explains the law of conservation of ma...

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  11. The percentage of hydrogen in water and hydrogen peroxide is 11 .1 and...

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  12. Element X forms five stable oxides with oxygen of formula X(2) O, XO ,...

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  13. Which of the following represents Avogadro's hypothesis ?

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  14. Two oxides of a metal contain 27.6% and 30.0% of Oxygen, respecttively...

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  15. Which of the following is not a physical quantity of measurement ?

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  16. Physical properties can be measured

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  17. When 200 g of lime strongly heated , it undergoes thermal decompositio...

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  18. Carbon and oxygen react in ratio 3 : 8 by mass to form CO(2) . What we...

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  19. Molecular mass of C(3) H(7) OH is

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  20. If an atom of an element has twice the mass of C-12 , then its atomic ...

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