---
title: Cleaning chemicals and safety at home — how Mova does on the tests · Chemistry
description: Lesson 25 of the chemistry course of Mova's primary school: 5 of 11 tests right, exam 0 of 4, every question with the options, the student's choice, the right answer and why it chose.
---

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[home](https://md.mova.elamur.ai/free/en/) / [at school](https://md.mova.elamur.ai/free/en/school-run/) / [Chemistry](https://md.mova.elamur.ai/free/en/school-run/chemistry/) / 25

# Cleaning chemicals and safety at home

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**Tests:** 5 of 11 right · **Exam:** 0 of 4 right · **Kind:** plain · **Understood:** 7 of 15 · **Run:** 2026-10-18, commit `f3c23ea72`

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Lesson 25 of the chemistry course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: [the lesson in the corpora](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/25-cleaning-chemicals-safety/).

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Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: [the lesson's questions in the corpora](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/).

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### Test 1 · right ✓ {#t1}

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Jake: "toilet's well grim, chuck bleach AND the toilet stuff in, double power innit". What's true?

- **1.** Yes, but only if you use very hot water — no support
- **2.** No, but only because it wastes your money — no support
- **3.** Yes, two cleaners together clean twice as well — no support
- **4.** No, the mix gives off a poisonous gas — **← Mova's choice** · **✓ the right answer** · score 6

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**Why:** It took the question to ask which statement is true. It chose option 4 with score 6, the only option with support. Its support: lesson 25, line 3: «Some cleaners must never meet: bleach poured together with an acid toilet cleaner gives off chlorine, a poisonous gas. The safe rule is simple: never mix clean…», reached through the same lesson line as the sentence the question matched. What matched: the same action «give off» (+4); the same thing acted on «chlorine» (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/t1/)

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### Test 2 · wrong ✗ {#t2}

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Your cousin keeps the plant spray in an old lemonade bottle "cos it's handy". What is the danger?

- **1.** There is no danger at all if the lid is on — **← Mova's choice** · no support
- **2.** The bottle will slowly dissolve from the inside — no support
- **3.** Someone may drink it thinking it's lemonade — **✓ the right answer** · no support
- **4.** The spray will turn into lemonade — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/t2/)

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### Test 3 · right ✓ {#t3}

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"it's got one of them child caps so the baby's fine with it". Right?

- **1.** Yes, the caps are completely locked — no support
- **2.** No, a cap only slows a child down — **← Mova's choice** · **✓ the right answer** · score 4
- **3.** Yes, babies can never open them at all — score 3
- **4.** No, the caps are easy for babies to bite — no support

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 4, against 3 for the next best. Its support: lesson 25, line 10: «Child-resistant caps need a push and a twist at the same time, which is hard for small hands; they slow a child down but are not a lock.», reached through the option's own match among the sentences about the question's things. What matched: the same thing acted on «child» (+2); the same action «slow down» (+1); the same doer «caps» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/t3/)

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### Test 4 · right ✓ {#t4}

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A cartoon scientist splashes potion in his eye and just blinks and carries on. What should really happen?

- **1.** Cover the eye and keep on working — no support
- **2.** Blink fast until the eye stops stinging — no support
- **3.** Rinse with lots of clean water and get help — **← Mova's choice** · **✓ the right answer** · score 6
- **4.** Rub the eye until the potion is gone — no support

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**Why:** It took the question to ask which statement is true. It chose option 3 with score 6, the only option with support. Its support: lesson 25, line 4: «Chemicals stay in their own bottles, sprays are used with a window open, and if anything splashes into an eye it is rinsed with lots of clean water straight aw…», reached through the same lesson line as the sentence the question matched. What matched: the same action «rinse» (+4); the same circumstance (+2). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/t4/)

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### Test 5 · wrong ✗ {#t5}

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"shut up about goggles, it's only water in the beaker". Why wear them anyway?

- **1.** Water is the most dangerous liquid of them all — **← Mova's choice** · no support
- **2.** The rules are only there to annoy you — no support
- **3.** You can't always be sure what is in a beaker — **✓ the right answer** · no support
- **4.** Goggles stop water from boiling over — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/t5/)

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### Test 6 · wrong ✗ {#t6}

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If a cleaning spray is used in a tiny bathroom with the door and window shut, what happens?

- **1.** The spray goes off and stops working — **← Mova's choice** · no support
- **2.** Fumes build up in the air you breathe — **✓ the right answer** · no support
- **3.** The spray cleans twice as well — no support
- **4.** The fumes turn back into liquid — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/t6/)

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### Test 7 · right ✓ {#t7}

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Little sister found a shiny colourful capsule in the laundry box: "sweetie!" What should you do?

- **1.** Take it away gently and tell an adult — **← Mova's choice** · **✓ the right answer** · score 5
- **2.** Rinse it under the tap and give it back — no support
- **3.** Let her try it, a little is harmless — no support
- **4.** Hide it in your pocket and say nothing — no support

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**Why:** It took the question to ask what is done. It chose option 1 with score 5, the only option with support. Its support: lesson 13, line 2: «Rust forms when iron joins up with oxygen from the air and with water. Take away either one, the water or the oxygen, and the iron hardly rusts at all.», reached through the option's own match among the sentences about the question's things. What matched: it fills the role the question asks for (+3); the same action «take away» (+2); the same property (+1). Against it: a different thing acted on (counts against) (-1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/t7/)

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### Test 8 · wrong ✗ {#t8}

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Which of these is safe?

- **1.** Putting bleach in a cup to carry it — **← Mova's choice** · no support
- **2.** Mixing two cleaners to make a stronger, better one — no support
- **3.** Keeping cleaners in their own labelled bottles — **✓ the right answer** · no support
- **4.** Storing tablets in a sweet jar — no support

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**Why:** Nothing it remembers matched the question, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/t8/)

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### Test 9 · wrong ✗ {#t9}

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Mum dropped the TV remote and a button battery rolled away, the toddler's been near it. "crap, can't find it". What's the right move?

- **1.** Wait and see if he gets a tummy ache — **← Mova's choice** · no support
- **2.** Let him drink water and forget it — no support
- **3.** Look again tomorrow when it is light — no support
- **4.** Treat it as an emergency and get help now — **✓ the right answer** · no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/t9/)

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### Test 10 · right ✓ {#t10}

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Why might a few vitamin pills that look like sweets hurt a small child?

- **1.** Sweet-looking pills are made of plastic — no support
- **2.** A small body is harmed by a smaller amount — **← Mova's choice** · **✓ the right answer** · score 14
- **3.** Vitamins are always a poison for everyone who takes them — no support
- **4.** Children cannot take in any vitamins — no support

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**Why:** It took the question to ask why something happens (its cause). It chose option 2 with score 14, the only option with support. Its support: lesson 25, line 14: «A smaller body is harmed by a smaller amount, so medicines and chemicals that are fine for adults can badly hurt a child.», reached through the cause of the sentence the question matched. What matched: the same action «harm» (+5); the same thing acted on «smaller body» (+5); the same doer «smaller amount» (+4). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/t10/)

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### Test 11 · wrong ✗ {#t11}

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The red-bordered diamond with a flame on a can of spray tells you what?

- **1.** It is good for the environment — no support
- **2.** It catches fire easily — **✓ the right answer** · no support
- **3.** It is perfectly safe to drink — no support
- **4.** It must be kept warm and dry — **← Mova's choice** · score 9

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**Why:** It took the question to ask what it is done to. It chose option 4 with score 9, the only option with support. Its support: lesson 25, line 4: «Chemicals stay in their own bottles, sprays are used with a window open, and if anything splashes into an eye it is rinsed with lots of clean water straight aw…», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+5); the same thing acted on «sprays» (+4). The right option, 2, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/t11/)

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### Exam question 1 · formal language · wrong ✗ {#e1}

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Identify the principal reason for which the admixture of bleach with an acidic lavatory cleaner is expressly prohibited.

- **1.** The admixture produces an unpleasant colour — **← Mova's choice** · no support
- **2.** The admixture neutralises all cleaning action — no support
- **3.** The admixture liberates a poisonous gas — **✓ the right answer** · no support
- **4.** The admixture generates excessive foam — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/e1/)

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### Exam question 2 · formal language · wrong ✗ {#e2}

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In the event of a chemical substance entering the eye, which course of action is most consistent with established first-aid guidance?

- **1.** Closure of the eye pending spontaneous recovery — no support
- **2.** Vigorous rubbing of the eye with a dry cloth — score 3
- **3.** Application of a household cleaner to neutralise the substance within the eye — **← Mova's choice** · score 9
- **4.** Copious rinsing with clean water and notification of an adult — **✓ the right answer** · no support

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**Why:** It took the question to ask what it is done to. It chose option 3 with score 9, against 3 for the next best. Its support: lesson 17, line 16: «Pool test kits compare the colour of a water sample with drops added to a colour card; water that is too acidic stings the eyes.», reached through the same lesson line as the sentence the question matched. What matched: it fills the role the question asks for (+5); the same thing acted on «water» (+4). The right option, 4, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/e2/)

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### Exam question 3 · formal language · wrong ✗ {#e3}

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Which of the following statements most accurately characterises the function of a child-resistant closure?

- **1.** It preserves the contents from deterioration by light — **← Mova's choice** · no support
- **2.** It indicates that the contents are suitable for children — no support
- **3.** It renders the contents entirely inaccessible to all persons — no support
- **4.** It impedes, but does not wholly prevent, access by young children — **✓ the right answer** · no support

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**Why:** Nothing it remembers matched the question, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/e3/)

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### Exam question 4 · formal language · wrong ✗ {#e4}

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It is given that a young child is suspected of having ingested a button battery. Select the response that is consistent with the established facts.

- **1.** The battery is harmless once swallowed — **← Mova's choice** · no support
- **2.** Observation for several days is sufficient — no support
- **3.** Immediate attendance at hospital is required — **✓ the right answer** · no support
- **4.** A carbonated drink should be administered — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/25-cleaning-chemicals-safety/e4/)

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- ← previous: [24. Soap and why washing works](https://md.mova.elamur.ai/free/en/school-run/chemistry/24-soap-and-why-washing-works/)
- next →: [26. Colours of fire: fireworks](https://md.mova.elamur.ai/free/en/school-run/chemistry/26-colours-of-fire-fireworks/)
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