State Of Matter — Part 1 MCQs with Explanations

Let's understand this question step-by-step The question asks about "compressibility" for solids, liquids, and gases. What is Compressibility ? Compressibility means how much you can squeeze a substance or material into a smaller space. Imagine trying to press something down or push its particles closer together. Now, let's look at the three states of matter and how easily they can be squeezed: 1. Solids (like a stone or a piece of wood): In solids, the tiny particles (atoms or molecules) are packed very, very closely together. They are held by strong forces and have very little empty space between them. Because there's hardly any empty space to push them into, it's extremely difficult to squeeze a solid. Therefore, solids are the least compressible . 2. Liquids (like water or milk): In liquids, the particles are still quite close together, but they are not as tightly packed as in solids. They can move past each other, and there's a little bit of empty space, but not much. You can squeeze liquids a tiny, tiny bit, but not very much at all. So, liquids are more compressible than solids, but much less compressible than gases . 3. Gases (like the air we breathe or the gas in a balloon): In gases, the particles are very, very far apart from each other. They move around freely and randomly, and there is a lot of empty space between them. Because there's so much empty space, it's very easy to push these particles closer together and reduce the volume. Therefore, gases are the most compressible . So, if we put them in order from least compressible to most compressible : Solid < Liquid < Gas This order means: - Solids are less compressible than liquids. - Liquids are less compressible than gases. Looking at the options: Option B: Solid < Liquid < Gas is the correct order.

Let's break down how to solve this temperature conversion problem! First, we need to convert Fahrenheit (°F) to Celsius (°C). The formula for that is: °C = (°F - 32) × 5/9 In this case, °F = 113. So, °C = (113 - 32) × 5/9 = 81 × 5/9 = 45°C Now, we need to convert Celsius (°C) to Kelvin (K). The formula for that is: K = °C + 273.15 So, K = 45 + 273.15 = 318.15 K The closest option to 318.15 K is 318 K. Therefore, the answer is: Option A: 318 K

Understanding the Question: This question asks us which of the given substances does NOT get bigger (expand) when it changes from a liquid to a solid. Explanation of Options: Option A: Water - When water freezes into ice, it actually expands . This is why ice floats and why pipes can burst in winter. Option B: Cast-iron - Cast iron also expands when it solidifies. This property is useful in casting. Option C: Aluminium - Aluminium contracts (gets smaller) when it solidifies. This is the opposite of expanding. Option D: Type metal - Type metal expands when it solidifies allowing it to fill intricate molds. Why the Answer is Aluminium: Aluminium is the only substance on the list that contracts instead of expanding when it changes from liquid to solid. Therefore, the correct answer is C: aluminium

Melting point is the temperature at which a solid changes into liquid at atmospheric pressure. If a solid has strong intermolecular forces of attraction , more heat energy is required to overcome these forces, therefore its melting point will be higher. If the intermolecular forces are weak , less heat energy is required, and the melting point will be lower. Thus melting point basically reflects how strongly the particles of a substance attract each other. Hence it indicates the strength of intermolecular forces of attraction .

Bose-Einstein condensate is the correct answer to “The latest discovered state of matter is”. This question is standard in competitive examination syllabi for State Of Matter.

Boyle's law is the correct answer to “Which law was formulated in 1662 and concluded that the product of pressure and volume remains almost constant”. This question is standard in competitive examination syllabi for State Of Matter.

fifth state of matter is the correct answer to “Bose-Einstein condensate is a”. This question is standard in competitive examination syllabi for State Of Matter.

Turbidity is the correct answer to “. . . . . . . . is the measure of relative clarity of a liquid.”. This question is standard in competitive examination syllabi for State Of Matter.

Only 2 is the correct answer to “Consider the following statements about mixture? 1. A substance can be separated into other kinds of matter by any physical process. 2. Dissolved sodium chloride can be separated from water by the physical process of evaporation. Which of the statements given above is/are correct”. This question is standard in competitive examination syllabi for State Of Matter.

monoatomic molecule is the correct answer to “A molecule of a substance is similar to its atom for”. This question is standard in competitive examination syllabi for State Of Matter.

Helium is the correct answer to “Which one of the following is monoatomic”. This question is standard in competitive examination syllabi for State Of Matter.

the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum is the correct answer to “Sodium vapour lamps glow with yellow colour. This is due to”. This question is standard in competitive examination syllabi for State Of Matter.

lodine is the correct answer to “Which one of the following is not a monoatomic element”. This question is standard in competitive examination syllabi for State Of Matter.

Vapour pressure is the correct answer to “Following properties will decrease with increase in temperature except”. This question is standard in competitive examination syllabi for State Of Matter.

distillation is the correct answer to “A mixture of water and alcohol can be separated by”. This question is standard in competitive examination syllabi for State Of Matter.

-273°C is the correct answer to “The absolute zero, i.e. temperature below which is not achievable, is about”. This question is standard in competitive examination syllabi for State Of Matter.

fractional distillation is the correct answer to “A student by chance mixed acetone with alcohol. The mixture of acetone and alcohol can be separated by”. This question is standard in competitive examination syllabi for State Of Matter.

Melting point of ice is lowered with increase in pressure is the correct answer to “Why do two ice blocks join to form one block when pressed together”. This question is standard in competitive examination syllabi for State Of Matter.

Avogadro's hypothesis is the correct answer to “The proposition 'equal volumes of different gases contain equal numbers of molecules at the same temperature and pressure' is known as”. This question is standard in competitive examination syllabi for State Of Matter.

poise is the correct answer to “Unit of viscosity is”. This question is standard in competitive examination syllabi for State Of Matter.

nmole of a gas is the correct answer to “In general equation pV = nRT, V is the volume of”. This question is standard in competitive examination syllabi for State Of Matter.

A is true, but R is false is the correct answer to “Assertion (A) All molecules of an ideal gas move with the same speed. Reason (R) There is no attraction between the molecules is in ideal gas.”. This question is standard in competitive examination syllabi for State Of Matter.

Tin is the correct answer to “Which of the following has the lowest melting point”. This question is standard in competitive examination syllabi for State Of Matter.

Henry's Law is the correct answer to “Which chemical law proposes that soft drinks and soda bottles are sealed under high pressure to increase the solubility of CO 2”. This question is standard in competitive examination syllabi for State Of Matter.

Cheese is the correct answer to “Which one of the following is an example of a gel”. This question is standard in competitive examination syllabi for State Of Matter.

Solutions is the correct answer to “. . . . . . . . are homogeneousmixtures of two or more components.”. This question is standard in competitive examination syllabi for State Of Matter.

Glass is the correct answer to “Which of the following is a super cooled liquid”. This question is standard in competitive examination syllabi for State Of Matter.

The measurable unit of pressure is denoted in metre is the correct answer to “Which one of the following statements is incorrect”. This question is standard in competitive examination syllabi for State Of Matter.

solid dispersed in gas is the correct answer to “Smoke is formed due to”. This question is standard in competitive examination syllabi for State Of Matter.

1, 3, 4 is the correct answer to “Some of the following properties are transport properties. 1. Viscosity 2. Surface tension 3. Thermal conductance 4. Diffusion Select the correct alternate of transport properties.”. This question is standard in competitive examination syllabi for State Of Matter.

distillation is the correct answer to “The joint process of vaporisation and condensation is called”. This question is standard in competitive examination syllabi for State Of Matter.

hydrophilic colloid is the correct answer to “A substance which readily forms colloidal solution in contact with water is called”. This question is standard in competitive examination syllabi for State Of Matter.

water vapour is the correct answer to “When pure water boils vigorously, the bubbles that rise to the surface are composed primarily of”. This question is standard in competitive examination syllabi for State Of Matter.

Conservation of mass energy is the correct answer to “Creation of something from nothing is against the law of”. This question is standard in competitive examination syllabi for State Of Matter.

A is false, but R is true is the correct answer to “Assertion (A ) All liquids are conductors of electricity. Reason (R) Under the condition of low pressure and high voltage, liquids can be made conducting.”. This question is standard in competitive examination syllabi for State Of Matter.

NH3 is the correct answer to “Which of the following gases will have the highest rate of diffusion”. This question is standard in competitive examination syllabi for State Of Matter.

1, 2 and 3 is the correct answer to “Consider the following statements. 1. When evaporation takes place, cooling takes place. 2. Evaporation takes place at all temperature, boiling takes place only at the boiling point. 3. Evaporation is a surface phenomenon. Which of the statements given above is/are true”. This question is standard in competitive examination syllabi for State Of Matter.

Ethylene glycol is the correct answer to “Which one of the following is used as an anti-freezer, which effectively depresses the freezing point of water in an automobile”. This question is standard in competitive examination syllabi for State Of Matter.

1 and 3 is the correct answer to “Consider the following statements. 1. A real gas can be approximated as an ideal gas when it is highly dilute. 2. Only monoatomic gases can be approximated as ideal gases. 3. An ideal gas does not undergo phase transitions. Which of the above statements are correct”. This question is standard in competitive examination syllabi for State Of Matter.

the collisions between the molecules increase is the correct answer to “When a gas is compressed at constant temperature”. This question is standard in competitive examination syllabi for State Of Matter.