JEE Main Test 13

Result

JEE Main Test 13

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

A
Slightly higher than that when the thunderstorm is not there

B
Uninfluenced by occurrence of thunderstorm

C
Which depends upon the amount of dust in air

D
Slightly lower than that of rain water without thunderstorm

Solution

Normal rain water has a pH value 5.6.
Thunderstorm forms NO which after oxidation gives HNO₃. Thus rain water accompanying thunderstorm has a pH lower than 5.6.
Hence, option D is correct.
Question 2
4 / -1

Which of the following is a branched polymer ?

A
Low density polythene

B
Polyester

C
Nylon

D
PVC

Solution

Branched polymer do not pack effectively and have low density. Low density polythene is a branched polymer.
Question 3
4 / -1

Which of the following is most poisonous

A
CO

B
CO₂

C
C

D
SO₂

Solution

In human beings (carbon monoxide) causes headache and difficulty in breathing. The haemoglobin has greater affinity to CO than oxygen. The Hb.CO reduces the oxygen carrying capacity of haemoglobin.