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Chemistry

Chemistry
The number of hydrogen bonds between guanine and cytosine in DNA is

2
1
4
3

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Chemistry
Molasses a by-product in the manufacture of sugar, is converted into

Paper
Fuel
Alcohol
Pulp

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Chemistry
Percentage of carbon in steel ranges from

4.0 to 6.0
1.5 to 3.0
3.0 to 4.0
0.1 to 1.5

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Chemistry
Concentration of a material which is lethal to 50% animal is called

LD50
NOAEL
LC50
ADI

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Chemistry
Number of6.023 × 1020 atoms present in one mole of a gas at STP is

6.023 × 1023
6.023 × 1020
'6.023 × 10–20
'6.023 × 10–23

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Chemistry
Which of the following elements is non-radioactive ?

Plutonium
Thorium
Zirconium
Uranium

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MORE MCQ ON Chemistry

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