EduFarming
Your list · 0हिं

Type at least two letters. Press Esc to close.

↑↓ navigate↵ openTAB cycle filter

Mixtures & Alligation · Question 4 of 60

Question 4

EasyOriginal question

A lab assistant has a 20% acid solution and a 50% acid solution. In what ratio should they be mixed to get a 30% acid solution?

Options for question 4

Show the answer and explanation
CorrectNot quiteAnswer A

Correct answer: A

Explanation

  1. 20% part : 50% part = (50−30):(30−20)(50 - 30) : (30 - 20).

  2. = 20:10=2:120 : 10 = 2 : 1.

Worth noting

The mean 30% sits closer to 20%, so more of the 20% solution is needed. That check rules out 1:21 : 2.

Concept
Alligation rule applied to concentrations
Typical time
40 s
Your time
—
The rule this testsThe alligation rule
Practise this chapter →

Ten questions from Mixtures & Alligation, at your own pace.

Practise this chapter →

Ten questions from Mixtures & Alligation, at your own pace.

Practise this chapterAll 60 questions in Mixtures & AlligationRevise the notes for Mixtures & Alligation