---
title: Identify the feature of the soap particle by virtue of which it remo… — Soap and why washing works · tree and pragmatics
description: Identify the feature of the soap particle by virtue of which it removes grease. Exam question 1 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 wrong.
---

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# Exam question 1 · Soap and why washing works

<!-- .ven lang=en -->
Identify the feature of the soap particle by virtue of which it removes grease.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 3 · wrong ✗ · **Who acts:** you, feature · **What happens:** identify, remove, feature · **To what, where:** feature, grease, soap particle

<!-- .vabout -->
This is exam question 1 of lesson 24 «Soap and why washing works» of the chemistry course of Mova's primary school, asked in stiff, formal language. 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/#e1).

## The question {#question}

```conllu
# sent_id = question:chemistry:24-soap-and-why-washing-works:e1:1
# text = Identify the feature of the soap particle by virtue of which it removes grease.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	feature	feature	NOUN	NN	Number=Sing	1	obj	_	_
4	of	of	ADP	IN	_	7	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
6	soap	soap	NOUN	NN	Number=Sing	7	compound	_	_
7	particle	particle	NOUN	NN	Number=Sing	3	nmod	_	_
8	by	by	ADP	IN	_	9	case	_	_
9	virtue	virtue	NOUN	NN	Number=Sing	1	obl	_	_
10	of	of	ADP	IN	_	11	case	_	_
11	which	which	PRON	WDT	PronType=Rel	13	obl	_	_
12	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	13	nsubj	_	_
13	removes	remove	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	acl:relcl	_	_
14	grease	grease	NOUN	NN	Number=Sing	13	obj	_	SpaceAfter=No
15	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* | the feature of the soap particle |  |  |  | by virtue | vn characterize-29.2-1-1 «NP V NP S\_ING»: agent=Agent feature=Theme |
| 2 | **remove** | present | feature | grease |  |  |  | of virtue | vn banish-10.2 «NP V NP PP.source»: agent=Agent grease=Theme of which=Source |
| 3 | **feature** |  |  | the soap particle |  |  |  |  | nom feature «cognition transitive»: of=patient |

<!-- .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 {#o1}

<!-- .ven lang=en -->
It is entirely composed of water

```conllu
# sent_id = question:chemistry:24-soap-and-why-washing-works:e1:o1:1
# text = It is entirely composed of water
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	nsubj:pass	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	aux:pass	_	_
3	entirely	entirely	ADV	RB	_	4	advmod	_	_
4	composed	compose	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
5	of	of	ADP	IN	_	6	case	_	_
6	water	water	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **compose** | present · passive |  | It |  |  |  | of water; entirely *property* | vn create-26.4-1 «NP V NP»: subject=Result |

### Option 2 {#o2}

<!-- .ven lang=en -->
It dissolves grease by the application of considerable heat to the surface

```conllu
# sent_id = question:chemistry:24-soap-and-why-washing-works:e1:o2:1
# text = It dissolves grease by the application of considerable heat to the surface
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	dissolves	dissolve	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	grease	grease	NOUN	NN	Number=Sing	2	obj	_	_
4	by	by	ADP	IN	_	6	case	_	_
5	the	the	DET	DT	Definite=Def|PronType=Art	6	det	_	_
6	application	application	NOUN	NN	Number=Sing	2	obl	_	_
7	of	of	ADP	IN	_	9	case	_	_
8	considerable	considerable	ADJ	JJ	Degree=Pos	9	amod	_	_
9	heat	heat	NOUN	NN	Number=Sing	6	nmod	_	_
10	to	to	ADP	IN	_	12	case	_	_
11	the	the	DET	DT	Definite=Def|PronType=Art	12	det	_	_
12	surface	surface	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **dissolve** | present | It | grease |  |  |  | by the application of considerable heat; to the surface *result* | vn break-45.1 «NP V NP PP.result»: agent=Agent grease=Patient to surface=Result |
| 2 | **apply** |  | considerable heat |  |  |  |  |  | nom application «act intransitive»: of=agent |

### Option 3 · ✓ the right answer {#o3}

<!-- .ven lang=en -->
It possesses a water-attracting head and a grease-attracting tail

```conllu
# sent_id = question:chemistry:24-soap-and-why-washing-works:e1:o3:1
# text = It possesses a water-attracting head and a grease-attracting tail
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	possesses	possess	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
4	water	water	NOUN	NN	Number=Sing	6	compound	_	SpaceAfter=No
5	-	-	PUNCT	HYPH	_	4	punct	_	SpaceAfter=No
6	attracting	attract	VERB	VBG	VerbForm=Ger	7	amod	_	_
7	head	head	NOUN	NN	Number=Sing	2	obj	_	_
8	and	and	CCONJ	CC	_	13	cc	_	_
9	a	a	DET	DT	Definite=Ind|PronType=Art	13	det	_	_
10	grease	grease	NOUN	NN	Number=Sing	12	compound	_	SpaceAfter=No
11	-	-	PUNCT	HYPH	_	10	punct	_	SpaceAfter=No
12	attracting	attract	VERB	VBG	VerbForm=Ger	13	amod	_	_
13	tail	tail	NOUN	NN	Number=Sing	7	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **possess** | present | It | a attracting head and a attracting tail |  |  |  |  | vn own-100.1 «NP V NP»: agent=Pivot head=Theme |
| 2 | **attract** | gerund |  |  |  |  |  |  | vn lure-59.3 «NP V NP»: agent=Agent |
| 3 | **attract** | gerund |  |  |  |  |  |  | vn lure-59.3 «NP V NP»: agent=Agent |

### Option 4 {#o4}

<!-- .ven lang=en -->
It converts grease directly into gas

```conllu
# sent_id = question:chemistry:24-soap-and-why-washing-works:e1:o4:1
# text = It converts grease directly into gas
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	converts	convert	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	grease	grease	NOUN	NN	Number=Sing	2	obj	_	_
4	directly	directly	ADV	RB	_	2	advmod	_	_
5	into	into	ADP	IN	_	6	case	_	_
6	gas	gas	NOUN	NN	Number=Sing	2	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **convert** | present | It | grease |  |  |  | into gas *result*; directly *property* | vn turn-26.6.1-1 «NP V NP.patient PP.result»: agent=Agent grease=Patient into gas=Result |

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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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