MCQ

Explain state changes using kinetic particle theory

Magnetite is an ore of iron which contains the ions $\text{Fe}^{2+}$, $\text{Fe}^{3+}$, and $\text{O}^{2-}$ only. What is the formula of magnetite?

2024 Spring

1

MCQ

Explain state changes using kinetic particle theory

Concentrated aqueous sodium chloride and dilute sulfuric acid are both electrolysed using inert electrodes.Which row identifies the product at the cat...

2024 Spring

2

MCQ

Explain state changes using kinetic particle theory

Electrolytes can be broken down by electrolysis. Which rows are correct for each electrolyte? [Table_1]Table:1. dilute aqueous potassium chloride: $2H...

2024 Spring

2

MCQ

Explain state changes using kinetic particle theory

Which statement about hydrogen–oxygen fuel cells is correct?

2024 Spring

1

MCQ

Explain state changes using kinetic particle theory

Which statement defines the activation energy, $E_a$, for a reaction?

2024 Spring

2

MCQ

Explain state changes using kinetic particle theory

The equation for the complete combustion of ethyne, H≡C−C≡H, is shown.$2\text{H}−\text{C}≡\text{C}−\text{H} + 5\text{O}=\text{O} \rightarr...

2024 Spring

1

MCQ

Explain state changes using kinetic particle theory

In experiment 1, small lumps of limestone are added to dilute ethanoic acid at 40 °C. The volume of carbon dioxide released is measured at regular ti...

2024 Spring

1

MCQ

Explain state changes using kinetic particle theory

In the Haber process, nitrogen and hydrogen are reacted to make ammonia. $$\text{N}_{2}(g) + 3\text{H}_{2}(g) \rightleftharpoons 2\text{NH}_{3}(g)$$ T...

2024 Spring

2

MCQ

Explain state changes using kinetic particle theory

The Ostwald process is used to make nitric acid. The conditions used in this process are: 1. a catalyst containing a transition element 2. a pressure ...

2024 Spring

1

MCQ

Explain state changes using kinetic particle theory

Hydrogen iodide is dissolved in water. $$\text{HI} \rightarrow \text{H}^+ + \text{I}^-$$ Which row describes the final colours seen when the solution ...

2024 Spring

3

MCQ

Explain state changes using kinetic particle theory

Solid X is heated for 600 seconds. The graph shows the heating curve that is obtained. What is the melting point of X?

2024 Spring

1

MCQ

Explain state changes using kinetic particle theory

Which statements about diffusion are correct? 1. Aqueous ions cannot diffuse in water. 2. Diffusion is caused by the random movement of particles. 3....

2024 Spring

1

MCQ

Explain state changes using kinetic particle theory

Which statement about an atom of fluorine, $^{19}_{9}\text{F}$, is correct?

2024 Spring

2

MCQ

Explain state changes using kinetic particle theory

Two of the isotopes of calcium are represented as $^{40}_{20}\text{Ca}$ and $^{44}_{20}\text{Ca}$. Which statement explains why these isotopes of calc...

2024 Spring

2

MCQ

Explain state changes using kinetic particle theory

Which statement describes a property of potassium iodide?

2024 Spring

2

MCQ

Explain state changes using kinetic particle theory

Methanal, CH$_2$O, has a boiling point of $-19^{\circ}$C. At $-20^{\circ}$C, the liquid methanal is a non-conductor of electricity. In a sample of met...

2024 Spring

1

MCQ

Explain state changes using kinetic particle theory

The structures of diamond and graphite are shown. Which statement about diamond and graphite is correct?

2024 Spring

3

MCQ

Explain state changes using kinetic particle theory

Which row contains a description of metallic bonding and a property that is explained by reference to metallic bonding? [Table_1]

2024 Spring

2

MCQ

Explain state changes using kinetic particle theory

What is the relative molecular mass, $M_r$, of sulfur dioxide?

2024 Spring

1

MCQ

Explain state changes using kinetic particle theory

Magnetite is an ore of iron which contains the ions $\text{Fe}^{2+}$, $\text{Fe}^{3+}$, and $\text{O}^{2-}$ only. What is the formula of magnetite?

2024 Spring

1