Question

Choose the response that most accurately and completely answers the following question.
A Science student has exactly four flasks - 1, 2, 3, and 4 - originally containing a red, a blue, a green, and an orange chemical, respectively. An experiment consists of mixing exactly two of these chemicals together by completely emptying the contents of one of the flasks into another of the flasks. The following conditions apply
The product of an experiment cannot be used in further experiments.
Mixing the contents of 1 and 2 produces a red chemical.
Mixing the contents of 2 and 3 produces an orange chemical.
Mixing the contents of 3 with the contents of either 1 or 4 produces a blue chemical.
Mixing the contents of 4 with the contents of either 1 or 2 produces a green chemical.

If the student performs exactly one experiment and exactly one of the resulting three non-empty flasks contains a blue chemical, which one of the following must be the colours of the chemicals in other two flasks?

Options

• both green

• both orange

• both red

• one green and one red

Answer 1

both green
Explanation:
If the contents of 4 and 1 i.e. orange and red are mixed, then they produce green. And also, two remaining flasks contain blue and green.
Hence, the other two flasks contain green chemicals.