---
title: Determine which of the following constitutes a chemical change. — Olympiad: kitchen chemistry puzzles ★★★ · tree and pragmatics
description: Determine which of the following constitutes a chemical change. Exam question 1 of lesson 36 «Olympiad: kitchen chemistry puzzles ★★★» 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 · Olympiad: kitchen chemistry puzzles ★★★

<!-- .ven lang=en -->
Determine which of the following constitutes a chemical change.

<!-- .vintro -->
**Mova's choice:** option 1 · **The right answer:** option 2 · wrong ✗ · **Who acts:** you · **What happens:** determine, follow, be

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This is exam question 1 of lesson 36 «Olympiad: kitchen chemistry puzzles ★★★» 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/36-olympiad-kitchen-chemistry-puzzles/#e1).

## The question {#question}

```conllu
# sent_id = question:chemistry:36-olympiad-kitchen-chemistry-puzzles:e1:1
# text = Determine which of the following constitutes a chemical change.
1	Determine	determine	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	_	_
2	which	which	PRON	WDT	PronType=Rel	9	nsubj	_	_
3	of	of	ADP	IN	_	9	case	_	_
4	the	the	DET	DT	Definite=Def|PronType=Art	9	det	_	_
5	following	follow	VERB	VBG	VerbForm=Ger	9	nsubj	_	_
6	constitutes	constitute	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	cop	_	_
7	a	a	DET	DT	Definite=Ind|PronType=Art	9	det	_	_
8	chemical	chemical	ADJ	JJ	Degree=Pos	9	amod	_	_
9	change	change	NOUN	NN	Number=Sing	1	ccomp	_	SpaceAfter=No
10	.	.	PUNCT	.	_	1	punct	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **determine** | imperative | you *not said here* |  |  |  |  |  | vn conjecture-29.5 «NP V that S»: agent=Agent |
| 2 | **follow** | gerund |  |  |  |  |  |  | vn occur-48.3-1 «NP V»: agent=Theme |
| 3 | **is** | present |  |  |  |  |  | of the chemical change | 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 {#o1}

<!-- .ven lang=en -->
The melting of butter in a warm pan

```conllu
# sent_id = question:chemistry:36-olympiad-kitchen-chemistry-puzzles:e1:o1:1
# text = The melting of butter in a warm pan
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	melting	melting	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	butter	butter	NOUN	NN	Number=Sing	2	nmod	_	_
5	in	in	ADP	IN	_	8	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
7	warm	warm	ADJ	JJ	Degree=Pos	8	amod	_	_
8	pan	pan	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **melt** |  |  | butter |  | a warm pan |  |  | nom melting «process transitive»: of=patient in=place |

### Option 2 · ✓ the right answer {#o2}

<!-- .ven lang=en -->
The browning of bread in a toaster

```conllu
# sent_id = question:chemistry:36-olympiad-kitchen-chemistry-puzzles:e1:o2:1
# text = The browning of bread in a toaster
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	browning	browning	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	bread	bread	NOUN	NN	Number=Sing	2	nmod	_	_
5	in	in	ADP	IN	_	7	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	7	det	_	_
7	toaster	toaster	NOUN	NN	Number=Sing	2	nmod	_	_
```

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

### Option 3 {#o3}

<!-- .ven lang=en -->
The condensation of steam upon a cold lid

```conllu
# sent_id = question:chemistry:36-olympiad-kitchen-chemistry-puzzles:e1:o3:1
# text = The condensation of steam upon a cold lid
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	condensation	condensation	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	steam	steam	NOUN	NN	Number=Sing	2	nmod	_	_
5	upon	upon	ADP	IN	_	8	case	_	_
6	a	a	DET	DT	Definite=Ind|PronType=Art	8	det	_	_
7	cold	cold	ADJ	JJ	Degree=Pos	8	amod	_	_
8	lid	lid	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **condense** |  |  | steam |  |  |  | upon a cold lid | nom condensation «cognition transitive»: of=patient upon=obl |

### Option 4 {#o4}

<!-- .ven lang=en -->
The dissolving of sugar in hot tea

```conllu
# sent_id = question:chemistry:36-olympiad-kitchen-chemistry-puzzles:e1:o4:1
# text = The dissolving of sugar in hot tea
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	_	_
2	dissolving	dissolving	NOUN	NN	Number=Sing	0	root	_	_
3	of	of	ADP	IN	_	4	case	_	_
4	sugar	sugar	NOUN	NN	Number=Sing	2	nmod	_	_
5	in	in	ADP	IN	_	7	case	_	_
6	hot	hot	ADJ	JJ	Degree=Pos	7	amod	_	_
7	tea	tea	NOUN	NN	Number=Sing	2	nmod	_	_
```

<!-- .fr -->
| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **dissolve** |  |  | sugar |  | hot tea |  |  | nom dissolving «process transitive»: of=patient in=place |

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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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