MCQ

Explain state changes using kinetic particle theory

Substance M is a solid at 30°C.The substance is heated to 80°C and its temperature measured as it cools down to room temperature.The cooling curve i...

2023 Spring

MCQ

Explain state changes using kinetic particle theory

Which gas has the fastest rate of diffusion?

2023 Spring

MCQ

Explain state changes using kinetic particle theory

There are two stable isotopes of bromine. The mass number of isotope 1 is 79. The mass number of isotope 2 is 81. Which statement is correct?

2023 Spring

MCQ

Explain state changes using kinetic particle theory

Which statement about ions and ionic bonds is correct?

2023 Spring

MCQ

Explain state changes using kinetic particle theory

Part of the Periodic Table is shown. Which type of chemical bonding is present in the oxide of F and in the oxide of G?

2023 Spring

MCQ

Explain state changes using kinetic particle theory

Elements X and Y react to form a compound.Element X loses two electrons and element Y gains one electron.What is the charge on the ions of elements X ...

2023 Spring

MCQ

Explain state changes using kinetic particle theory

Which statement about graphite explains why it is used as an electrode?

2023 Spring

MCQ

Explain state changes using kinetic particle theory

Methane, CH_4, burns in air to form carbon dioxide and water. What is the balanced equation for this reaction?

2023 Spring

MCQ

Explain state changes using kinetic particle theory

The equation for the thermal decomposition of sodium hydrogencarbonate is shown.$$2\text{NaHCO}_3 \rightarrow \text{Na}_2\text{CO}_3 + \text{H}_2\text...

2023 Spring

MCQ

Explain state changes using kinetic particle theory

An electrolysis experiment is done using carbon electrodes. Hydrogen and oxygen are formed at the electrodes. What is the electrolyte?

2023 Spring

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

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

MCQ

Explain state changes using kinetic particle theory

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

2024 Spring

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

MCQ

Explain state changes using kinetic particle theory

Which statement describes a property of potassium iodide?

2024 Spring

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

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

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

MCQ

Explain state changes using kinetic particle theory

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

2024 Spring

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