NECTA Chemistry AI Practice

Question 1

Which subatomic particle is found in the nucleus and has no electric charge?

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Question 2

What type of chemical bond involves the sharing of electron pairs between atoms?

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Question 3

Calculate the number of moles in 36 grams of water (H2O). (Molar mass of H2O = 18 g/mol)

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Question 4

Which of the following is a property of acids?

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Question 5

In an electrochemical cell, what is the electrode where oxidation occurs called?

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Question 6

What is the general formula for alkanes?

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Question 7

What does a catalyst do in a chemical reaction?

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Question 8

Which electron shell is filled first according to the Aufbau principle?

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Question 9

Which of these salts is formed from a strong acid and a strong base?

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Question 10

What is the oxidation state of sulfur in H2SO4?

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Question 11

Which method is used to determine the relative atomic mass of an element?

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Question 12

In the Haber process, N2 and H2 react to form NH3. What type of equilibrium is established?

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Question 13

Which type of organic compound contains the functional group -OH?

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Question 14

Which acid-base theory defines acids as proton donors?

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Question 15

What is the effect of increasing temperature on the rate of a chemical reaction?

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Question 16

Which element has an atomic number of 12?

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Question 17

Which of the following is NOT a characteristic of ionic compounds?

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Question 18

What is the molecular formula of ethene?

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Question 19

In the reaction 2NO2 ⇌ N2O4, increasing pressure will favor which side?

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Question 20

Which compound is an example of an aldehyde?

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Question 21

What subatomic particle determines the identity of an element?

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Question 22

Which type of chemical bond involves the sharing of electron pairs between atoms?

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Question 23

What is the molar mass of water (H2O)?

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Question 24

Which of the following is a property of acids according to the Arrhenius definition?

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Question 25

In an electrochemical cell, the electrode where reduction occurs is called the:

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Question 26

Which functional group characterizes alcohols?

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Question 27

What happens to the rate of a reaction when the concentration of reactants is increased, assuming other conditions are constant?

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Question 28

Which subatomic particle has negligible mass and a negative charge?

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Question 29

Which type of bond is typically formed between a metal and a non-metal?

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Question 30

How many moles are there in 36 grams of water (H2O)?

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Question 31

Which of the following is a strong base?

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Question 32

What is the role of the salt bridge in an electrochemical cell?

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Question 33

Which of the following compounds is an alkene?

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Question 34

At equilibrium in a reversible reaction, which statement is true?

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Question 35

Which particle has a positive charge and nearly the same mass as a neutron?

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Question 36

What volume will 1 mole of an ideal gas occupy at standard temperature and pressure (STP)?

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Question 37

Which of these is NOT a characteristic of metallic bonding?

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Question 38

Which acid-base indicator turns red in acidic solution and blue in basic solution?

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Question 39

What is the oxidation state of carbon in methane (CH4)?

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Question 40

In an endothermic reaction, heat is:

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Question 41

What is the atomic number of an element?

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Question 42

How many moles are present in 90 grams of water (H2O)? (Molar mass of H2O = 18 g/mol)

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Question 43

Which of the following is a characteristic of acids?

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Question 44

In an electrochemical cell, the electrode where oxidation occurs is called:

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Question 45

Which organic compound contains a carboxyl functional group?

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Question 46

What effect does increasing temperature generally have on the rate of a chemical reaction?

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Question 47

Which particle has a relative mass approximately equal to 1 atomic mass unit and no electric charge?

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Question 48

Which bond is formed when electrons are completely transferred from one atom to another?

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Question 49

Calculate the number of molecules in 2 moles of oxygen gas (O2). (Avogadro's number = 6.02 × 10^23 molecules/mol)

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Question 50

A base is defined as a substance that:

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Question 51

What is the main purpose of a salt bridge in an electrochemical cell?

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Question 52

Which functional group is characteristic of alcohols?

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Question 53

In a chemical equilibrium, what happens when the concentration of a reactant is increased?

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Question 54

Which of the following statements about isotopes is true?

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Question 55

Which species gains electrons during a redox reaction?

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Question 56

What is the empirical formula of a compound that contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass?

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Question 57

Which factor does NOT affect the rate of a chemical reaction?

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Question 58

Which of the following correctly describes a coordinate (dative covalent) bond?

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Question 59

Which subatomic particle has a negative charge?

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Question 60

What type of bond is formed when two atoms share electrons equally?

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Question 61

How many moles are present in 36 grams of water (H2O)? (Molar mass of H2O = 18 g/mol)

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Question 62

In an electrochemical cell, electrons flow from the anode to the cathode. What happens at the cathode?

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Question 63

What is the functional group present in alcohols?

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Question 64

Which type of chemical bond is formed by the transfer of electrons?

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Question 65

Calculate the number of molecules in 3 moles of oxygen gas (O2). (Avogadro's number = 6.02 × 10^23 molecules/mole)

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Question 66

Which of the following salts is formed from a strong acid and a strong base?

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Question 67

In electrolysis of molten sodium chloride, what is produced at the cathode?

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Question 68

Which of the following compounds is an alkane?

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Question 69

What happens to the rate of a reaction when the concentration of reactants is increased?

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Question 70

Which particle determines the isotope of an element?

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Question 71

Which of the following is a weak acid?

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Question 72

At equilibrium, which statement is true?

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Question 73

What is the electron configuration of a neutral oxygen atom (atomic number 8)?

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Question 74

For the reaction N2 + 3H2 ⇌ 2NH3, what will happen if pressure is increased?

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Question 75

Which compound is an example of an ester?

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Question 76

How many moles are present in 36 grams of water (H₂O)? (Molar mass of H₂O = 18 g/mol)

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Question 77

Which of the following solutions has a pH less than 7?

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Question 78

In an electrochemical cell, the electrode where oxidation occurs is called the:

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Question 79

Which functional group is present in all alcohols?

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Question 80

What effect does increasing temperature have on the rate of a chemical reaction?

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Question 81

In the equilibrium reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g), what happens if pressure is increased?

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Question 82

Which of the following is a characteristic property of ionic compounds?

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Question 83

Which of the following compounds is an example of an alkene?

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Question 84

Which of the following statements correctly describes the formation of an ionic bond?

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Question 85

In a redox reaction, if the oxidation number of an element increases, what has happened to that element?

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