Exam question 2 · Tarnish and how metals change

Which of the following statements most accurately characterises the chemical behaviour of gold in air?

Mova's choice: option 1 · The right answer: option 1 · right ✓ · What happens: follow, characteris · To what, where: chemical behaviour, air

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.

The question

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	Which	which	PRON	PronType=Rel	8 characterises	nsubj
2	of	of	ADP	_	5 statements	case
3	the	the	DET	Definite=Def PronType=Art	5 statements	det
4	following	follow	VERB	VerbForm=Ger	5 statements	amod
5	statements	statement	NOUN	Number=Plur	8 characterises	obl
6	most	most	ADV	Degree=Sup	7 accurately	advmod
7	accurately	accurately	ADV	_	8 characterises	advmod
8	characterises	characteris	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
9	the	the	DET	Definite=Def PronType=Art	11 behaviour	det
10	chemical	chemical	ADJ	Degree=Pos	11 behaviour	amod
11	behaviour	behaviour	NOUN	Number=Sing	8 characterises	obj
12	of	of	ADP	_	13 gold	case
13	gold	gold	NOUN	Number=Sing	11 behaviour	nmod
14	in	in	ADP	_	15 air	case
15	air	air	NOUN	Number=Sing	8 characterises	obl
16	?	?	PUNCT	_	8 characterises	punct

#	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

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

Option 1 · ← Mova's choice · ✓ the right answer

It undergoes almost no reaction and does not tarnish

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	It	it	PRON	Case=Nom Gender=Neut Number=Sing Person=3 PronType=Prs	2 undergoes	nsubj
2	undergoes	undergo	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
3	almost	almost	ADV	_	5 reaction	advmod
4	no	no	DET	PronType=Neg	5 reaction	det
5	reaction	reaction	NOUN	Number=Sing	2 undergoes	obj
6	and	and	CCONJ	_	9 tarnish	cc
7	does	do	AUX	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	9 tarnish	aux
8	not	not	PART	Polarity=Neg	9 tarnish	advmod
9	tarnish	tarnish	VERB	VerbForm=Inf	2 undergoes	conj

#	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

It reacts rapidly and must be stored under oil

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	It	it	PRON	Case=Nom Gender=Neut Number=Sing Person=3 PronType=Prs	2 reacts	nsubj
2	reacts	react	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
3	rapidly	rapidly	ADV	_	2 reacts	advmod
4	and	and	CCONJ	_	7 stored	cc
5	must	must	AUX	VerbForm=Fin	7 stored	aux
6	be	be	AUX	VerbForm=Inf	7 stored	aux:pass
7	stored	store	VERB	Tense=Past VerbForm=Part Voice=Pass	2 reacts	conj
8	under	under	ADP	_	9 oil	case
9	oil	oil	NOUN	Number=Sing	7 stored	obl

#	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

It acquires a green protective patina over time

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	It	it	PRON	Case=Nom Gender=Neut Number=Sing Person=3 PronType=Prs	2 acquires	nsubj
2	acquires	acquire	VERB	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	root	root
3	a	a	DET	Definite=Ind PronType=Art	6 patina	det
4	green	green	ADJ	Degree=Pos	6 patina	amod
5	protective	protective	ADJ	Degree=Pos	6 patina	amod
6	patina	patina	NOUN	Number=Sing	2 acquires	obj
7	over	over	ADP	_	8 time	case
8	time	time	NOUN	Number=Sing	6 patina	nmod

#	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

It is converted into rust within a few years

The words, one row each (CoNLL-U)

#	word	lemma	UPOS	features	head	relation
1	It	it	PRON	Case=Nom Gender=Neut Number=Sing Person=3 PronType=Prs	3 converted	nsubj:pass
2	is	be	AUX	Mood=Ind Number=Sing Person=3 Tense=Pres VerbForm=Fin	3 converted	aux:pass
3	converted	convert	VERB	Tense=Past VerbForm=Part Voice=Pass	root	root
4	into	into	ADP	_	5 rust	case
5	rust	rust	NOUN	Number=Sing	3 converted	obl
6	within	within	ADP	_	9 years	case
7	a	a	DET	Definite=Ind PronType=Art	9 years	det
8	few	few	ADJ	Degree=Pos	9 years	amod
9	years	year	NOUN	Number=Plur	3 converted	obl

#	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

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.

This page in Markdown → https://md.mova.elamur.ai/free/en/corpora/questions/chemistry/14-tarnish-and-how-metals-change/e2/