---
title: Which of the following statements most accurately characterises the… — Tarnish and how metals change · tree and pragmatics
description: Which of the following statements most accurately characterises the chemical behaviour of gold in air? Exam question 2 of lesson 14 «Tarnish and how metals change» of the chemistry course of Mova's primary school, with the dependency tree and pragmatics of the question and of each option; Mova's cho
---

<!-- md -->
[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/questions/chemistry/14-tarnish-and-how-metals-change/e2/)

<!-- crumbs -->
[home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [questions](https://md.mova.elamur.ai/free/en/corpora/questions/) / [Chemistry](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/) / [Tarnish and how metals change](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/14-tarnish-and-how-metals-change/) / e2

# Exam question 2 · Tarnish and how metals change

<!-- .ven lang=en -->
Which of the following statements most accurately characterises the chemical behaviour of gold in air?

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 1 · right ✓ · **What happens:** follow, characteris · **To what, where:** chemical behaviour, air

<!-- .vabout -->
This is exam question 2 of lesson 14 «Tarnish and how metals change» 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/14-tarnish-and-how-metals-change/#e2).

## The question {#question}

```conllu
# sent_id = question:chemistry:14-tarnish-and-how-metals-change:e2:1
# text = Which of the following statements most accurately characterises the chemical behaviour of gold in air?
1	Which	which	PRON	WDT	PronType=Rel	8	nsubj	_	_
2	of	of	ADP	IN	_	5	case	_	_
3	the	the	DET	DT	Definite=Def|PronType=Art	5	det	_	_
4	following	follow	VERB	VBG	VerbForm=Ger	5	amod	_	_
5	statements	statement	NOUN	NNS	Number=Plur	8	obl	_	_
6	most	most	ADV	RBS	Degree=Sup	7	advmod	_	_
7	accurately	accurately	ADV	RB	_	8	advmod	_	_
8	characterises	characteris	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
9	the	the	DET	DT	Definite=Def|PronType=Art	11	det	_	_
10	chemical	chemical	ADJ	JJ	Degree=Pos	11	amod	_	_
11	behaviour	behaviour	NOUN	NN	Number=Sing	8	obj	_	_
12	of	of	ADP	IN	_	13	case	_	_
13	gold	gold	NOUN	NN	Number=Sing	11	nmod	_	_
14	in	in	ADP	IN	_	15	case	_	_
15	air	air	NOUN	NN	Number=Sing	8	obl	_	SpaceAfter=No
16	?	?	PUNCT	.	_	8	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **follow** | gerund |  |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |
| 2 | **characteris** | present |  | the chemical behaviour of gold |  | air |  | of the following statements; accurately *property* | tree rules |

<!-- .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 -->
It undergoes almost no reaction and does not tarnish

```conllu
# sent_id = question:chemistry:14-tarnish-and-how-metals-change:e2:o1:1
# text = It undergoes almost no reaction and does not tarnish
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	undergoes	undergo	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	almost	almost	ADV	RB	_	5	advmod	_	_
4	no	no	DET	DT	PronType=Neg	5	det	_	_
5	reaction	reaction	NOUN	NN	Number=Sing	2	obj	_	_
6	and	and	CCONJ	CC	_	9	cc	_	_
7	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	aux	_	_
8	not	not	PART	RB	Polarity=Neg	9	advmod	_	_
9	tarnish	tarnish	VERB	VB	VerbForm=Inf	2	conj	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **undergo** | present | It | no reaction |  |  |  |  | tree rules |
| 2 | **not** **tarnish** | present · do-support |  |  |  |  |  |  | vn entity\_specific\_cos-45.5 «NP.patient V»: agent=Patient |

### Option 2 {#o2}

<!-- .ven lang=en -->
It reacts rapidly and must be stored under oil

```conllu
# sent_id = question:chemistry:14-tarnish-and-how-metals-change:e2:o2:1
# text = It reacts rapidly and must be stored under oil
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	reacts	react	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	rapidly	rapidly	ADV	RB	_	2	advmod	_	_
4	and	and	CCONJ	CC	_	7	cc	_	_
5	must	must	AUX	MD	VerbForm=Fin	7	aux	_	_
6	be	be	AUX	VB	VerbForm=Inf	7	aux:pass	_	_
7	stored	store	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	2	conj	_	_
8	under	under	ADP	IN	_	9	case	_	_
9	oil	oil	NOUN	NN	Number=Sing	7	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **react** | present | It |  |  |  |  | rapidly *property* | vn respond-113 «NP V»: agent=Agent |
| 2 | **store** | must · passive |  |  |  | oil |  |  | vn keep-15.2 «NP V NP PP.location»: under oil=Location |

### Option 3 {#o3}

<!-- .ven lang=en -->
It acquires a green protective patina over time

```conllu
# sent_id = question:chemistry:14-tarnish-and-how-metals-change:e2:o3:1
# text = It acquires a green protective patina over time
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	_
2	acquires	acquire	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	_	_
4	green	green	ADJ	JJ	Degree=Pos	6	amod	_	_
5	protective	protective	ADJ	JJ	Degree=Pos	6	amod	_	_
6	patina	patina	NOUN	NN	Number=Sing	2	obj	_	_
7	over	over	ADP	IN	_	8	case	_	_
8	time	time	NOUN	NN	Number=Sing	6	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **acquire** | present | It | a green protective patina |  |  | over time |  | vn obtain-13.5.2-1 «NP.asset V NP»: agent=Asset patina=Theme |

### Option 4 {#o4}

<!-- .ven lang=en -->
It is converted into rust within a few years

```conllu
# sent_id = question:chemistry:14-tarnish-and-how-metals-change:e2:o4:1
# text = It is converted into rust within a few years
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	3	nsubj:pass	_	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	3	aux:pass	_	_
3	converted	convert	VERB	VBN	Tense=Past|VerbForm=Part|Voice=Pass	0	root	_	_
4	into	into	ADP	IN	_	5	case	_	_
5	rust	rust	NOUN	NN	Number=Sing	3	obl	_	_
6	within	within	ADP	IN	_	9	case	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
8	few	few	ADJ	JJ	Degree=Pos	9	amod	_	_
9	years	year	NOUN	NNS	Number=Plur	3	obl	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **convert** | present · passive |  | It |  |  | year | into rust *result* | vn turn-26.6.1-1 «NP V NP.patient PP.result»: subject=Patient into rust=Result |

<!-- div src -->

**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 -->

<!-- pn -->
- ← previous: [Tarnish and how metals change, exam 1](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/14-tarnish-and-how-metals-change/e1/)
- next →: [Tarnish and how metals change, exam 3](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/14-tarnish-and-how-metals-change/e3/)
- ↑ back to [Tarnish and how metals change](https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/14-tarnish-and-how-metals-change/)