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Smog, Classical Smog

Two bottles w...

Question

Two bottles were half filled with water from Ganga ('P') and kaveri ('Q') and kept under identical airtight conditions for 5 days. The oxygen was determined to be 2 $%$ in bottle ('P') and 10 $%$ in bottle ('Q'). What could be the cause of this difference?

A

Ganga is more polluted than Kaveri

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B

Both the rivers are equally polluted

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C

Kaveri is more polluted than Ganga

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D

Kaveri has more minerals than Ganga

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Solution

The correct option is A
Ganga is more polluted than Kaveri

Ganga is more polluted than Kaveri. Lower DO [Dissolved Oxygen] indicates more polluted water. In this case DO of Ganga is 2 $%$ which is less than DO of Kaveri which is 10 $%$ .

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Similar questions

Q. Two bottles were half filled with water from Ganga ('P') and Kaveri ('Q') and kept under identical airtight conditions for 5 days. The oxygen was determined to be 2% in bottle ('P') and 10% in bottle ('Q'). What could because of this indifference?

Q. The ratio of the volume of water in Bottle P to the volume of water in Bottle Q is

3 : 4

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mL of the water from Bottle P and the ratio then became

13 : 20

. How much water was there in bottle P at first?

Q. Directions:- Study the following information carefully to answer the question given below.

Six chemicals L, M, N, O, P and Q are kept in bottles of different colours viz. green, red, blue, white, pink and violet, not necessarily in the same order. The bottles are arranged from left to right, again not necessarily in the same order.
Chemical M is kept in a white bottle. Chemical L is not kept in a green bottle and is kept to the immediate left of the violet bottle. Chemical O is kept in the blue bottle and is kept exactly between the bottles containing chemicals L and M. The red bottle is at the extreme left end. The bottles containing chemical Q is not kept at either of the ends. The green bottle is kept at the extreme right end. Chemical P is not kept near the white bottle.

Which bottle contains chemical Q?

Q. Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about

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Do you think tiny bubbles will appear on heating the water taken out from the bottle? Justify your answer.

Q. Directions:- Study the following information carefully to answer the question given below.

Six chemicals L, M, N, O, P and Q are kept in bottles of different colours viz. green, red, blue, white, pink and violet, not necessarily in the same order. The bottles are arranged from left to right, again not necessarily in the same order.
Chemical M is kept in a white bottle. Chemical L is not kept in a green bottle and is kept to the immediate left of the violet bottle. Chemical O is kept in the blue bottle and is kept exactly between the bottles containing chemicals L and M. The red bottle is at the extreme left end. The bottles containing chemical Q is not kept at either of the ends. The green bottle is kept at the extreme right end. Chemical P is not kept near the white bottle.

Which of the following combinations of chemical and bottle is correct?

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Smog, Classical Smog

Standard XII Chemistry

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