---
title: Why can washing powder get an egg stain out even at 30 °C? — Soap and why washing works · tree and pragmatics
description: Why can washing powder get an egg stain out even at 30 °C? Test 10 · ★★ of lesson 24 «Soap and why washing works» of the chemistry course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's choice was right.
---

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# Test 10 · ★★ · Soap and why washing works

<!-- .ven lang=en -->
Why can washing powder get an egg stain out even at 30 °C?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** egg · **What happens:** wash, get, stain out · **To what, where:** egg, 30 ° C

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This is test 10 · ★★ of lesson 24 «Soap and why washing works» of the chemistry course of Mova's primary school. The page gives the question's syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause, then the 4 options as the student saw them, each with its tree and pragmatics. Every text is parsed by Mova itself. How the student answered it, with the score of every option and why: [the test at school](https://md.mova.elamur.ai/free/en/school-run/chemistry/24-soap-and-why-washing-works/#t10).

## The question {#question}

```conllu
# sent_id = question:chemistry:24-soap-and-why-washing-works:t10:1
# text = Why can washing powder get an egg stain out even at 30 °C?
1	Why	why	ADV	WRB	PronType=Int	5	advmod	_	_
2	can	can	AUX	MD	VerbForm=Fin	5	aux	_	_
3	washing	wash	VERB	VBG	VerbForm=Ger	4	amod	_	_
4	powder	powder	NOUN	NN	Number=Sing	5	compound	_	_
5	get	get	VERB	VB	VerbForm=Inf	0	root	_	_
6	an	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	egg	egg	NOUN	NN	Number=Sing	5	obj	_	_
8	stain	stain	VERB	VB	VerbForm=Inf	5	xcomp	_	_
9	out	out	ADP	RP	_	8	compound:prt	_	_
10	even	even	ADV	RB	_	12	advmod	_	_
11	at	at	ADP	IN	_	12	case	_	_
12	30	30	NUM	CD	NumForm=Digit|NumType=Card	14	nummod	_	_
13	°	°	SYM	SYM	_	14	compound	_	SpaceAfter=No
14	C	c	NOUN	NN	Number=Sing	8	obl	_	SpaceAfter=No
15	?	?	PUNCT	.	_	5	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **wash** | gerund |  |  |  |  |  |  | vn floss-41.2.1 «NP V»: agent=Agent |
| 2 | **get** | can |  | a egg |  |  |  |  | tree rules |
| 3 | **stain out** | infinitive | a egg *not said here* | 30 ° C |  |  |  |  | vn butter-9.9 «NP V NP.destination»: agent=Agent |

<!-- .note -->
One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

## The options {#options}

### Option 1 · ← Mova's choice · ✓ the right answer {#o1}

<!-- .ven lang=en -->
Its enzymes break down the stain

```conllu
# sent_id = question:chemistry:24-soap-and-why-washing-works:t10:o1:1
# text = Its enzymes break down the stain
1	Its	its	PRON	PRP$	Case=Gen|Gender=Neut|Number=Sing|Person=3|Poss=Yes|PronType=Prs	2	nmod:poss	_	_
2	enzymes	enzyme	NOUN	NNS	Number=Plur	3	nsubj	_	_
3	break	break	VERB	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	down	down	ADP	RP	_	3	compound:prt	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	stain	stain	NOUN	NN	Number=Sing	3	obj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **break down** | present | Its enzymes | the stain |  |  |  |  | vn break-45.1 «NP V NP»: agent=Agent stain=Patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
The stain fades in the dark drum

```conllu
# sent_id = question:chemistry:24-soap-and-why-washing-works:t10:o2:1
# text = The stain fades in the dark drum
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	stain	stain	NOUN	NN	Number=Sing	3	nsubj	_	_
3	fades	fade	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	in	in	ADP	IN	_	7	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
6	dark	dark	ADJ	JJ	Degree=Pos	7	amod	_	_
7	drum	drum	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **fade** | present | the stain |  |  | the dark drum |  |  | vn other\_cos-45.4 «NP.patient V»: agent=Patient |

### Option 3 {#o3}

<!-- .ven lang=en -->
The egg dissolves in any water

```conllu
# sent_id = question:chemistry:24-soap-and-why-washing-works:t10:o3:1
# text = The egg dissolves in any water
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	egg	egg	NOUN	NN	Number=Sing	3	nsubj	_	_
3	dissolves	dissolve	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	in	in	ADP	IN	_	6	case	_	_
5	any	any	DET	DT	PronType=Ind	6	det	_	_
6	water	water	NOUN	NN	Number=Sing	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **dissolve** | present | the egg |  |  | any water |  |  | vn break-45.1 «NP.patient V»: agent=Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
The machine boils the water anyway

```conllu
# sent_id = question:chemistry:24-soap-and-why-washing-works:t10:o4:1
# text = The machine boils the water anyway
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	machine	machine	NOUN	NN	Number=Sing	3	nsubj	_	_
3	boils	boil	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
5	water	water	NOUN	NN	Number=Sing	3	obj	_	_
6	anyway	anyway	ADV	RB	_	3	advmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **boil** | present | the machine | the water |  |  |  | anyway *property* | vn cooking-45.3 «NP V NP.patient»: agent=Agent water=Patient |

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**Text:** the tests of Mova's primary school, written for Mova (`world/data/school/`), as the course runner gave them to the student. **Trees:** Mova's own parse — the `en` model on the CPU, when the site is built — not checked by a teacher; they may be wrong. **Frames:** Mova's frames reader (`prag`), each text read on its own. Elamur Cosmic License.

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