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Oily food kept out for few days gives a ...

Oily food kept out for few days gives a bad taste and a bad smell because of ______.

A

corrosion

B

displacement

C

heating

D

rancidity

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Figure shows a potentiometer with a cell of 2.0 V and internal resistance 0.40 Omega maintaining a potential drop across the resistor wire AB. A standard cell which maintains a constant emf of 1.02V (for very moderate currents upto a few mA) gives a balance point at 67.3 cm length of the wire.To ensure that very low current drawn from the standard cell,a very high resistance of 600 k Omega is put in series with it, which is shorted close to the balance point. The standard cell is then replaced by a cell of unknown emf E and the balance point found similarly,turns out to be at 82.3 cm length of the wire . What is the value of E ?

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CHETANA PUBLICATION-Chemical Reactions and equations-EXAMPLE
  1. Oily food kept out for few days gives a bad taste and a bad smell beca...

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  2. Match the columns:

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  3. Match the columns:

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  4. Match the columns:

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  5. State the true false statemets Digestion food is a chemical change.

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  6. State the true false statemets A catalyst slows down the rate of rea...

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  7. State the true false statements Reaction that releases energy is cal...

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  8. State the true false statements Ammonium chloride is a sublimable sa...

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  9. State the true false statements Rusting of iron is an oxidation reac...

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  10. State the true false statements Size of the particles of reactants d...

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  11. State the true false statements Combustion is the rapid reaction bet...

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  12. State the true false statements A precipitate is an insoluble solid ...

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  13. State the true false statements A chemical equation shows a chemical...

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  14. State the true false statemets Decomposition of compost is an endoth...

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  15. State the true false statements Unlike physical changes, chemical ch...

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  16. State the true false statements A burning of match stick is an examp...

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  17. State the true false statements The reaction Zn(s)+CuSO4(aq)rarrZnSO...

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  18. State the true false statements Chemical change is a temporary chang...

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  19. State the true false statements (g) indicates the physical state of ...

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  20. State the true false statements Conversion of quick lime into slaked...

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  21. State the true false statements Calcium oxide is also called lime or...

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