---
title: Identify the method most appropriate to the separation of steel pape… — Separating mixtures · tree and pragmatics
description: Identify the method most appropriate to the separation of steel paper clips from sand. Exam question 2 of lesson 8 «Separating mixtures» 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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# Exam question 2 · Separating mixtures

<!-- .ven lang=en -->
Identify the method most appropriate to the separation of steel paper clips from sand.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **Who acts:** you, method, steel paper · **What happens:** identify, clip, separate · **To what, where:** sand

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This is exam question 2 of lesson 8 «Separating mixtures» 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/8-separating-mixtures/#e2).

## The question {#question}

```conllu
# sent_id = question:chemistry:8-separating-mixtures:e2:1
# text = Identify the method most appropriate to the separation of steel paper clips from sand.
1	Identify	identify	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	method	method	NOUN	NN	Number=Sing	12	nsubj	_	_
4	most	most	ADV	RBS	Degree=Sup	5	advmod	_	_
5	appropriate	appropriate	ADJ	JJ	Degree=Pos	3	amod	_	_
6	to	to	ADP	IN	_	8	case	_	_
7	the	the	DET	DT	Definite=Def|PronType=Art	8	det	_	_
8	separation	separation	NOUN	NN	Number=Sing	5	obl	_	_
9	of	of	ADP	IN	_	11	case	_	_
10	steel	steel	NOUN	NN	Number=Sing	11	compound	_	_
11	paper	paper	NOUN	NN	Number=Sing	8	nmod	_	_
12	clips	clip	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	1	ccomp	_	_
13	from	from	ADP	IN	_	14	case	_	_
14	sand	sand	NOUN	NN	Number=Sing	12	obl	_	SpaceAfter=No
15	.	.	PUNCT	.	_	1	punct	_	_
```

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **identify** | imperative | you *not said here* |  |  |  |  |  | vn characterize-29.2-1-1 «NP V S\_ING»: agent=Agent clause=Theme |
| 2 | **clip** | present | the method |  |  | sand |  |  | vn cut-21.1-1 «NP V NP PP.source»: agent=Agent from sand=Source |
| 3 | **separate** |  | steel paper |  |  |  |  |  | nom separation «state intransitive»: of=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 -->
The application of a magnet

```conllu
# sent_id = question:chemistry:8-separating-mixtures:e2:o1:1
# text = The application of a magnet
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	application	application	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	5	case	_	_
4	a	a	DET	DT	Definite=Ind|PronType=Art	5	det	_	_
5	magnet	magnet	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **apply** |  | a magnet |  |  |  |  |  | nom application «act intransitive»: of=agent |

### Option 2 {#o2}

<!-- .ven lang=en -->
Dissolution in water

```conllu
# sent_id = question:chemistry:8-separating-mixtures:e2:o2:1
# text = Dissolution in water
1	Dissolution	dissolution	NOUN	NN	Number=Sing	0	root	_	_
2	in	in	ADP	IN	_	3	case	_	_
3	water	water	NOUN	NN	Number=Sing	1	nmod	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 3 {#o3}

<!-- .ven lang=en -->
Chromatography

```conllu
# sent_id = question:chemistry:8-separating-mixtures:e2:o3:1
# text = Chromatography
1	Chromatography	chromatography	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

### Option 4 {#o4}

<!-- .ven lang=en -->
Distillation

```conllu
# sent_id = question:chemistry:8-separating-mixtures:e2:o4:1
# text = Distillation
1	Distillation	distillation	NOUN	NN	Number=Sing	0	root	_	_
```

<!-- .note -->
The frames reader finds no event or fact in this sentence.

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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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