---
title: What would happen if you tried to separate iron sulphide back into i… — Molecules: when atoms join up · tree and pragmatics
description: What would happen if you tried to separate iron sulphide back into iron and sulphur with a magnet? Test 7 · ★ of lesson 3 «Molecules: when atoms join up» 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 ri
---

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# Test 7 · ★ · Molecules: when atoms join up

<!-- .ven lang=en -->
What would happen if you tried to separate iron sulphide back into iron and sulphur with a magnet?

<!-- .vintro -->
**Mova's choice:** option 2 · **The right answer:** option 2 · right ✓ · **Who acts:** you · **What happens:** happen, try, separate back · **To what, where:** iron sulphide, iron

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This is test 7 · ★ of lesson 3 «Molecules: when atoms join up» 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/3-molecules-when-atoms-join-up/#t7).

## The question {#question}

```conllu
# sent_id = question:chemistry:3-molecules-when-atoms-join-up:t7:1
# text = What would happen if you tried to separate iron sulphide back into iron and sulphur with a magnet?
1	What	what	PRON	WP	PronType=Int	3	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	3	aux	_	_
3	happen	happen	VERB	VB	VerbForm=Inf	0	root	_	_
4	if	if	SCONJ	IN	_	6	mark	_	_
5	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	6	nsubj	_	_
6	tried	try	VERB	VBD	Mood=Ind|Number=Sing|Person=2|Tense=Past|VerbForm=Fin	3	advcl	_	_
7	to	to	PART	TO	_	8	mark	_	_
8	separate	separate	VERB	VB	VerbForm=Inf	6	xcomp	_	_
9	iron	iron	NOUN	NN	Number=Sing	10	compound	_	_
10	sulphide	sulphide	NOUN	NN	Number=Sing	8	obj	_	_
11	back	back	ADV	RB	_	8	advmod	_	_
12	into	into	ADP	IN	_	13	case	_	_
13	iron	iron	NOUN	NN	Number=Sing	8	obl	_	_
14	and	and	CCONJ	CC	_	15	cc	_	_
15	sulphur	sulphur	NOUN	NN	Number=Sing	13	conj	_	_
16	with	with	ADP	IN	_	18	case	_	_
17	a	a	DET	DT	Definite=Ind|PronType=Art	18	det	_	_
18	magnet	magnet	NOUN	NN	Number=Sing	13	nmod	_	SpaceAfter=No
19	?	?	PUNCT	.	_	3	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **happen** | would |  |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |
| 2 | **try** *a condition, not said to happen* | past | you |  |  |  |  |  | vn try-61.1 «NP V S\_INF»: agent=Agent clause=Eventuality |
| 3 | **separate back** *not said to happen* | to-infinitive | you *not said here* | iron sulphide |  |  |  | into iron with a magnet and sulphur *goal* | vn classify-29.10 «NP V NP PP.goal»: agent=Agent sulphide=Theme into iron=Goal |

<!-- .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 {#o1}

<!-- .ven lang=en -->
The compound would explode

```conllu
# sent_id = question:chemistry:3-molecules-when-atoms-join-up:t7:o1:1
# text = The compound would explode
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	compound	compound	NOUN	NN	Number=Sing	4	nsubj	_	_
3	would	would	AUX	MD	VerbForm=Fin	4	aux	_	_
4	explode	explode	VERB	VB	VerbForm=Inf	0	root	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **explode** | would | the compound |  |  |  |  |  | vn sound\_emission-43.2 «NP V»: agent=Theme |

### Option 2 · ← Mova's choice · ✓ the right answer {#o2}

<!-- .ven lang=en -->
It would not work, the atoms are joined

```conllu
# sent_id = question:chemistry:3-molecules-when-atoms-join-up:t7:o2:1
# text = It would not work, the atoms are joined
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	4	nsubj	_	_
2	would	would	AUX	MD	VerbForm=Fin	4	aux	_	_
3	not	not	PART	RB	Polarity=Neg	4	advmod	_	_
4	work	work	VERB	VB	VerbForm=Inf	0	root	_	SpaceAfter=No
5	,	,	PUNCT	,	_	4	punct	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	atoms	atom	NOUN	NNS	Number=Plur	9	nsubj:pass	_	_
8	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	9	aux:pass	_	_
9	joined	join	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	4	ccomp	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **not** **work** | would | It |  |  |  |  |  | vn use-105.1 «NP V NP S\_INF»: agent=Agent clause=Eventuality |
| 2 | **join** | present · passive |  | the atoms |  |  |  |  | vn mix-22.1-2-1 «NP V NP»: subject=Patient |

### Option 3 {#o3}

<!-- .ven lang=en -->
The sulphur would stick to the magnet

```conllu
# sent_id = question:chemistry:3-molecules-when-atoms-join-up:t7:o3:1
# text = The sulphur would stick to the magnet
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	sulphur	sulphur	NOUN	NN	Number=Sing	4	nsubj	_	_
3	would	would	AUX	MD	VerbForm=Fin	4	aux	_	_
4	stick	stick	VERB	VB	VerbForm=Inf	0	root	_	_
5	to	to	ADP	IN	_	7	case	_	_
6	the	the	DET	DT	Definite=Def|PronType=Art	7	det	_	_
7	magnet	magnet	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **stick** | would | the sulphur |  |  |  |  | to the magnet | vn shake-22.3-2 «NP V NP PP»: agent=Agent to magnet=Co-Patient |

### Option 4 {#o4}

<!-- .ven lang=en -->
The iron would jump straight out onto the magnet

```conllu
# sent_id = question:chemistry:3-molecules-when-atoms-join-up:t7:o4:1
# text = The iron would jump straight out onto the magnet
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	iron	iron	NOUN	NN	Number=Sing	4	nsubj	_	_
3	would	would	AUX	MD	VerbForm=Fin	4	aux	_	_
4	jump	jump	VERB	VB	VerbForm=Inf	0	root	_	_
5	straight	straight	ADV	RB	_	6	advmod	_	_
6	out	out	ADV	RB	_	4	advmod	_	_
7	onto	onto	ADP	IN	_	9	case	_	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
9	magnet	magnet	NOUN	NN	Number=Sing	4	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **jump** | would | the iron |  |  | the magnet |  | out *property* | vn run-51.3.2-2-1 «NP V PP.location»: agent=Theme onto magnet=Trajectory |

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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.

<!-- /div -->

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- ← previous: [Molecules: when atoms join up, test 6](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/3-molecules-when-atoms-join-up/t6/)
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