EmSAT Achieve Exam — Questions and Answers

Question 1: What is a catalyst?

A substance that increases activation energy
A substance consumed in a reaction
A substance that speeds up a reaction without being consumed (Correct answer)
A product of the reaction

Correct answer: A substance that speeds up a reaction without being consumed

A catalyst speeds up a chemical reaction by providing an alternative pathway with lower activation energy. Crucially, it is not consumed in the reaction and can be reused.

Question 2: What is the formula for the volume of a cylinder?

2πrh
(4/3)πr³
πr²h (Correct answer)
πr²

Correct answer: πr²h

The volume of a cylinder is V = πr²h, where r is the radius of the circular base and h is the height.

Question 3: Solve: x² − 5x + 6 = 0

x = 2 or x = 3 (Correct answer)
x = 1 or x = 6
x = −2 or x = −3
x = 2 or x = −3

Correct answer: x = 2 or x = 3

Factor: (x − 2)(x − 3) = 0, so x = 2 or x = 3.

Question 4: Which of the following is a saturated hydrocarbon?

Ethyne (C₂H₂)
Ethane (C₂H₆) (Correct answer)
Benzene (C₆H₆)
Ethene (C₂H₄)

Correct answer: Ethane (C₂H₆)

Saturated hydrocarbons contain only single C−C bonds (alkanes). Ethane (C₂H₆) is fully saturated. Ethene and ethyne contain double and triple bonds respectively.

Question 5: What does HTML stand for and what is its primary purpose?

High-Tech Machine Learning; artificial intelligence
High Transfer Mail Link; sending emails
HyperText Markup Language; structuring and presenting content on web pages (Correct answer)
Home Tool Management Library; managing files

Correct answer: HyperText Markup Language; structuring and presenting content on web pages

HTML (HyperText Markup Language) is the standard markup language used to structure and present content on the World Wide Web, defining the layout and elements of web pages.

Question 6: A 60 W light bulb operates for 5 hours. How much electrical energy does it consume?

300 kJ
300 J
1080 J
1080 kJ (Correct answer)

Correct answer: 1080 kJ

E = P × t = 60 W × 18000 s = 1,080,000 J = 1080 kJ.

Question 7: What is an inference in reading comprehension?

A summary of the text
A conclusion drawn from clues in the text (Correct answer)
A question about the text
A direct quote from the text

Correct answer: A conclusion drawn from clues in the text

An inference is a logical conclusion drawn from evidence in the text, even when the information is not stated explicitly. Readers use context clues to infer meaning.

Question 8: What is the function of ribosomes?

Lipid storage
Protein synthesis (Correct answer)
Energy production
DNA replication

Correct answer: Protein synthesis

Ribosomes are the sites of protein synthesis. They read mRNA sequences and assemble amino acids into proteins following the genetic code.

Question 9: Choose the word that best completes the sentence: 'The scientist made a ___ discovery that changed medicine forever.'

ordinary
mediocre
trivial
groundbreaking (Correct answer)

Correct answer: groundbreaking

'Groundbreaking' means innovative or pioneering. If the discovery changed medicine forever, it must be significant and unprecedented — groundbreaking.

Question 10: In Python, what will print(type(3.14)) output?

<class 'double'>
<class 'float'> (Correct answer)
<class 'str'>
<class 'int'>

Correct answer: <class 'float'>

3.14 is a floating-point number, so Python identifies its type as 'float'.

Question 11: What is a gene mutation?

A heritable alteration in the DNA nucleotide sequence (Correct answer)
The normal process of DNA replication during cell division
A reversible change in gene expression caused by the environment
A change in the tertiary structure of a protein

Correct answer: A heritable alteration in the DNA nucleotide sequence

A mutation is a permanent, heritable change in the DNA sequence that can alter gene function and potentially be passed to offspring.

Question 12: Which organelle is known as the powerhouse of the cell because it produces ATP through cellular respiration?

Nucleus
Mitochondria (Correct answer)
Ribosome
Endoplasmic reticulum

Correct answer: Mitochondria

Mitochondria generate ATP via oxidative phosphorylation during aerobic respiration, supplying energy for all cell functions.

Question 13: Which sentence contains a dangling modifier?

Having read the instructions, the device was assembled correctly. (Correct answer)
After finishing the exam, the students left quietly.
Exhausted from the hike, the team rested at the camp.
Running along the beach, she spotted a dolphin.

Correct answer: Having read the instructions, the device was assembled correctly.

The phrase 'Having read the instructions' has no logical subject — the device cannot read instructions.

Question 14: According to the law of conservation of momentum, when two objects collide and stick together, the total momentum:

Depends on the collision type
Is conserved (Correct answer)
Decreases
Increases

Correct answer: Is conserved

In any collision with no external forces, total momentum before equals total momentum after (conservation of momentum).

Question 15: What is the potential energy of a 5 kg object at a height of 10 meters? (g = 10 m/s²)

100 J
50 J
250 J
500 J (Correct answer)

Correct answer: 500 J

Gravitational potential energy = mgh = 5 kg × 10 m/s² × 10 m = 500 J.

Question 16: What is the main idea of a paragraph called?

Transition
Concluding sentence
Topic sentence (Correct answer)
Supporting detail

Correct answer: Topic sentence

The topic sentence states the main idea of a paragraph. All other sentences in the paragraph support or elaborate on this central idea.

Question 17: Which of the following correctly describes the relationship between pressure and depth in a static fluid?

Pressure is independent of depth
Pressure decreases linearly with depth
Pressure increases exponentially with depth
Pressure increases linearly with depth (Correct answer)

Correct answer: Pressure increases linearly with depth

Hydrostatic pressure P = ρgh increases linearly with depth h.

Question 18: What is 'الفعل الناقص' in Arabic?

A verb that lacks a past tense
A verb with a weak letter (و or ي) as its last root letter (Correct answer)
A verb with only two letters
A defective irregular verb with no pattern

Correct answer: A verb with a weak letter (و or ي) as its last root letter

الفعل الناقص (defective verb) is a verb whose third root letter is a weak letter (و or ي), such as 'دعا' (to call) or 'مشى' (to walk). These verbs undergo spelling changes in conjugation.

Question 19: What is 'النعت' (an-na't) in Arabic grammar?

The preposition
The adjective/qualifier (Correct answer)
The verb
The subject

Correct answer: The adjective/qualifier

النعت (also called الصفة) is the adjective in Arabic grammar. It must agree with its modified noun in gender, number, case, and definiteness. For example: 'الكتابُ الجديدُ' (the new book).

Question 20: What is the sum of the infinite geometric series 8 + 4 + 2 + 1 + …?

32
12
16 (Correct answer)
24

Correct answer: 16

S = a/(1−r) = 8/(1−0.5) = 8/0.5 = 16.

Question 21: If two angles of a triangle are 60° and 80°, what is the third angle?

40° (Correct answer)
30°
60°
20°

Correct answer: 40°

The sum of angles in a triangle is 180°. Third angle = 180° − 60° − 80° = 40°.

Question 22: Choose the antonym of 'benevolent'.

Malevolent (Correct answer)
Kind
Generous
Charitable

Correct answer: Malevolent

'Benevolent' means well-meaning and kind. Its antonym is 'malevolent', which means having or showing a desire to do evil or harm others.

Question 23: Expand: (x + 3)²

x² + 3x + 9
x² + 9
x² + 6x + 9 (Correct answer)
x² − 6x + 9

Correct answer: x² + 6x + 9

(x + 3)² = (x + 3)(x + 3) = x² + 3x + 3x + 9 = x² + 6x + 9. Remember the middle term 2(x)(3) = 6x.

Question 24: What happens during addition polymerization?

Molecules exchange functional groups
Polymers break into monomers
Monomers with double bonds open and join to form a long chain (Correct answer)
Small molecules lose atoms to join together

Correct answer: Monomers with double bonds open and join to form a long chain

In addition polymerization, monomers containing double bonds (like ethene) have their double bonds broken open, and they link together to form a long polymer chain with no byproducts.

Question 25: How many valence electrons does oxygen have?

8
2
6 (Correct answer)
4

Correct answer: 6

Oxygen is in Group 16 (VIA) of the periodic table, so it has 6 valence electrons in its outer energy level (electron configuration: 2, 6).

Question 26: What is the literary device 'التشبيه' (tashbih)?

Simile (Correct answer)
Repetition
Metaphor
Personification

Correct answer: Simile

التشبيه is a simile in Arabic rhetoric — comparing two things using كـ (like) or كأن (as if). For example: 'هو كالأسد في الشجاعة' (He is like a lion in courage).

Question 27: In academic writing, which tone is most appropriate?

Formal and objective (Correct answer)
Emotional and personal
Humorous and casual
Informal and conversational

Correct answer: Formal and objective

Academic writing requires a formal, objective tone. It avoids slang, personal emotions, and humor, focusing instead on evidence and clear reasoning.

Question 28: What is the net force on an object moving at constant velocity?

Equal to its weight
Equal to friction force
Zero (Correct answer)
Equal to the applied force

Correct answer: Zero

According to Newton's First Law, an object moving at constant velocity has zero net force acting on it — all forces are balanced.

Question 29: Which of the following is an example of volatile memory?

SSD
Hard Disk Drive
ROM
RAM (Correct answer)

Correct answer: RAM

RAM (Random Access Memory) is volatile, meaning it loses its data when power is removed.

Question 30: If the mean of five numbers is 12, what is their sum?

60 (Correct answer)
12
24
48

Correct answer: 60

Mean = Sum / Count, so Sum = Mean × Count = 12 × 5 = 60.

Question 31: In a relational database, what does a primary key ensure?

Records are sorted alphabetically
All fields have default values
Tables are linked by foreign keys
Each record is uniquely identified (Correct answer)

Correct answer: Each record is uniquely identified

A primary key uniquely identifies each record in a database table, ensuring no duplicates.

Question 32: A photon has an energy of 3 eV. What is its approximate frequency? (h = 4.14 × 10⁻¹⁵ eV·s)

1.4 × 10¹⁵ Hz
3.0 × 10¹⁵ Hz
7.25 × 10¹⁴ Hz (Correct answer)
3.6 × 10¹⁴ Hz

Correct answer: 7.25 × 10¹⁴ Hz

f = E/h = 3 / (4.14 × 10⁻¹⁵) ≈ 7.25 × 10¹⁴ Hz, which falls in the visible light range.

Question 33: What is the function of a subordinate (dependent) clause?

It can stand alone as a complete sentence
It always begins with a coordinating conjunction
It provides additional information but cannot stand alone as a complete sentence (Correct answer)
It contains no subject or verb

Correct answer: It provides additional information but cannot stand alone as a complete sentence

A subordinate clause contains a subject and verb but begins with a subordinating conjunction (because, although, when) and cannot stand alone as a complete sentence.

Question 34: What is homeostasis?

The process of digestion
The immune response to pathogens
The process of cell division
The maintenance of a stable internal environment (Correct answer)

Correct answer: The maintenance of a stable internal environment

Homeostasis is the maintenance of a stable internal environment within an organism despite changes in external conditions. Examples include regulating body temperature and blood glucose levels.

Question 35: Choose the correctly spelled word.

Accomadation
Accommodation (Correct answer)
Acommodation
Accomodation

Correct answer: Accommodation

'Accommodation' is spelled with double 'c' and double 'm': A-C-C-O-M-M-O-D-A-T-I-O-N. It is one of the most commonly misspelled words in English.

Question 36: Which sentence uses the correct form of the verb?

She don't like coffee.
She not like coffee.
She doesn't like coffee. (Correct answer)
She doesn't likes coffee.

Correct answer: She doesn't like coffee.

With third-person singular subjects, we use 'doesn't' followed by the base form of the verb. 'She doesn't like coffee' is grammatically correct.

Question 37: What is the electron configuration of sodium (Na, atomic number 11)?

1s² 2s² 2p⁶ 3p¹
1s² 2s² 2p⁷
1s² 2s² 2p⁶ 3s²
1s² 2s² 2p⁶ 3s¹ (Correct answer)

Correct answer: 1s² 2s² 2p⁶ 3s¹

Sodium has 11 electrons, filling orbitals in order: 1s² (2), 2s² (4), 2p⁶ (10), 3s¹ (11), giving the configuration 1s² 2s² 2p⁶ 3s¹.

Question 38: What is the 'همزة الوصل' (hamzat al-wasl)?

A hamza that is always pronounced
A connecting hamza that is not pronounced when preceded by a vowel in connected speech (Correct answer)
The hamza in the middle of a word
A hamza that changes the meaning

Correct answer: A connecting hamza that is not pronounced when preceded by a vowel in connected speech

همزة الوصل is a connecting hamza that appears at the beginning of certain words (like اِسم، اِبن، اِفتح). It is pronounced only at the beginning of speech but drops when the word is connected to the previous word.

Question 39: A ball is thrown horizontally from the top of a 45 m cliff with a speed of 20 m/s. How far from the base of the cliff does it land? (g = 10 m/s²)

40 m
60 m (Correct answer)
80 m
100 m

Correct answer: 60 m

Time to fall: t = √(2h/g) = √9 = 3 s; horizontal range = 20 × 3 = 60 m.

Question 40: What is the correct diacritical mark (تشكيل) for the word 'عَلِمَ' meaning 'he knew'?

كسرة - فتحة - ضمة
فتحة - فتحة - فتحة
ضمة - كسرة - فتحة
فتحة - كسرة - فتحة (Correct answer)

Correct answer: فتحة - كسرة - فتحة

عَلِمَ follows the pattern فَعِلَ (fa'ila) with fatha on the first letter, kasra on the middle letter, and fatha on the last letter, which is a common Arabic verb pattern.

Question 41: What is the term for the literary technique where an author addresses an absent or imaginary entity as if it were present?

النداء (Correct answer)
التجسيد
الطباق
الالتفات

Correct answer: النداء

النداء (vocative address) is the technique of calling out to an absent, imaginary, or inanimate entity as though present.

Question 42: Which network topology connects all devices to a single central cable?

Ring
Star
Mesh
Bus (Correct answer)

Correct answer: Bus

In a bus topology, all devices share a single communication cable called the backbone.

Question 43: Which layer of the OSI model is responsible for end-to-end data delivery, error detection, and flow control between two hosts?

Session Layer (Layer 5)
Data Link Layer (Layer 2)
Transport Layer (Layer 4) (Correct answer)
Network Layer (Layer 3)

Correct answer: Transport Layer (Layer 4)

The Transport Layer (Layer 4) handles end-to-end communication using protocols such as TCP (reliable, connection-oriented) and UDP (faster, connectionless). TCP provides error recovery and flow control. The Network Layer routes packets between networks; the Data Link Layer handles node-to-node delivery within the same network.

Question 44: What is the law of reflection?

Light bends toward the normal when entering a denser medium
Reflected waves change speed
The angle of incidence equals the angle of reflection (Correct answer)
The angle of incidence equals the angle of refraction

Correct answer: The angle of incidence equals the angle of reflection

The law of reflection states that the angle of incidence equals the angle of reflection, both measured from the normal to the reflecting surface.

Question 45: A car decelerates uniformly from 30 m/s to rest over a distance of 90 m. What is the magnitude of the deceleration?

7.5 m/s²
5 m/s² (Correct answer)
2.5 m/s²
10 m/s²

Correct answer: 5 m/s²

Using v² = u² – 2as: 0 = 900 – 2a(90) → a = 900/180 = 5 m/s².

Question 46: What is the grammatical term for 'لَمْ' in the sentence 'لَمْ يكتبِ الطالبُ الواجبَ'?

A conditional particle
A negation particle that puts the verb in the subjunctive (منصوب)
A future negation particle
A negation particle that puts the verb in the jussive (مجزوم) (Correct answer)

Correct answer: A negation particle that puts the verb in the jussive (مجزوم)

'لَمْ' is a negation particle (حرف نفي وجزم) that negates past meaning and puts the following imperfect verb in the jussive mood (مجزوم).

Question 47: What is the overall equation for photosynthesis in plants?

6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂ (Correct answer)
6O₂ + C₆H₁₂O₆ → 6CO₂ + 6H₂O
CO₂ + H₂O → glucose + O₂ + ADP
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ATP

Correct answer: 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂

Photosynthesis converts carbon dioxide and water into glucose and oxygen using light energy absorbed by chlorophyll.

Question 48: If log₂(x) = 5, what is x?

25
64
10
32 (Correct answer)

Correct answer: 32

log₂(x) = 5 means x = 2⁵ = 32.

Question 49: What is the standard deviation a measure of?

Central tendency
The most frequent value
The middle value
Spread or variability in data (Correct answer)

Correct answer: Spread or variability in data

Standard deviation measures the spread or dispersion of data around the mean. A larger standard deviation indicates more variability in the data set.

Question 50: Which type of isomerism is exhibited by cis-2-butene and trans-2-butene?

Chain isomerism
Geometric (cis-trans) isomerism (Correct answer)
Positional isomerism
Optical isomerism

Correct answer: Geometric (cis-trans) isomerism

Cis- and trans-2-butene differ in the spatial arrangement of groups around the C=C double bond, making them geometric isomers.

Question 51: Which of the following is the inverse function of f(x) = 2x − 4?

f⁻¹(x) = (x−4)/2
f⁻¹(x) = 4−2x
f⁻¹(x) = (x+4)/2 (Correct answer)
f⁻¹(x) = 2x+4

Correct answer: f⁻¹(x) = (x+4)/2

Swap x and y then solve: x = 2y−4 → y = (x+4)/2.

Question 52: Which word correctly fills the blank: 'The students were ___ by the complexity of the problem.'

overrun
overflowed
overwhelmed (Correct answer)
overused

Correct answer: overwhelmed

'Overwhelmed' means to be completely overcome by something, especially emotions or difficulty. It is the correct word when describing feeling overcome by complexity.

Question 53: What type of reaction is: 2Na + Cl₂ → 2NaCl?

Double replacement
Synthesis (combination) (Correct answer)
Single replacement
Decomposition

Correct answer: Synthesis (combination)

This is a synthesis (combination) reaction where two reactants (sodium and chlorine) combine to form a single product (sodium chloride).

Question 54: What is the difference between a food chain and a food web?

A food chain shows all connections; a food web shows one pathway
A food chain shows one linear pathway of energy; a food web shows multiple interconnected pathways (Correct answer)
A food web only includes plants
They are the same thing

Correct answer: A food chain shows one linear pathway of energy; a food web shows multiple interconnected pathways

A food chain shows a single linear pathway of energy transfer from producer to consumers. A food web shows multiple interconnected food chains, representing the complex feeding relationships in an ecosystem.

Question 55: What is photosynthesis?

Releasing oxygen during respiration
Converting light energy to chemical energy stored in glucose (Correct answer)
Converting glucose to ATP
Breaking down glucose for energy

Correct answer: Converting light energy to chemical energy stored in glucose

Photosynthesis is the process by which plants, algae, and some bacteria convert light energy, CO₂, and water into glucose and oxygen. The overall equation is: 6CO₂ + 6H₂O + light → C₆H₁₂O₆ + 6O₂.

Question 56: What does HTML stand for?

High Transfer Machine Language
Home Tool Markup Language
Hyperlink and Text Markup Logic
Hyper Text Markup Language (Correct answer)

Correct answer: Hyper Text Markup Language

HTML stands for Hyper Text Markup Language, used to structure content on the web.

Question 57: What is the molar concentration of a solution made by dissolving 5.85 g of NaCl (M = 58.5 g/mol) in 500 cm³ of water?

1.0 mol/L
0.1 mol/L
0.2 mol/L (Correct answer)
2.0 mol/L

Correct answer: 0.2 mol/L

Moles of NaCl = 5.85/58.5 = 0.1 mol; concentration = 0.1 mol ÷ 0.5 L = 0.2 mol/L.

Question 58: What is the rate of a chemical reaction?

The change in concentration of reactants/products per unit time (Correct answer)
The energy released
The pressure during reaction
The change in temperature

Correct answer: The change in concentration of reactants/products per unit time

Reaction rate is defined as the change in concentration of reactants or products per unit time. It tells us how quickly a reaction proceeds.

Question 59: In the sentence 'جاءَ الطلابُ مسرعينَ', what is the grammatical function of 'مسرعينَ'?

Complement (تمييز)
Predicate (خبر)
Circumstantial adverb (حال) (Correct answer)
Subject (فاعل)

Correct answer: Circumstantial adverb (حال)

'مسرعينَ' is a حال (circumstantial adverb) describing the state of the subject while performing the action.

Question 60: What is the function of a topic sentence in a body paragraph?

To provide evidence
To end the paragraph
To introduce the main idea of the paragraph (Correct answer)
To connect to the next paragraph

Correct answer: To introduce the main idea of the paragraph

The topic sentence introduces the main idea of a body paragraph. Every sentence in the paragraph should relate to and support this topic sentence.

Question 61: What is the role of red blood cells?

Transporting oxygen via hemoglobin (Correct answer)
Fighting infection
Producing antibodies
Clotting blood

Correct answer: Transporting oxygen via hemoglobin

Red blood cells (erythrocytes) transport oxygen from the lungs to body tissues using the protein hemoglobin. They also carry CO₂ back to the lungs for exhalation.

Question 62: Which data structure uses LIFO (Last In, First Out) ordering?

Queue
Binary Tree
Stack (Correct answer)
Linked List

Correct answer: Stack

A stack follows LIFO order, meaning the last element added is the first to be removed.

EmSAT Achieve Exam

The Emirates Standardized Test (EmSAT) is a national system of computer-based adaptive tests aligned with UAE national standards, used for university admissions and educational placement across the United Arab Emirates.

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