Physical changes may be reversed by changing the temperature. Select one: O True O False

Q: ASSERTION: The solubility of all gases in water decreases with the rise in temperature. REASON: The…

A: The solubility of gases in water is inversely proportional to temperature because if the temperature…

Q: A substance has a definite shape and definite volume. What is the state of the substance?(a) solid…

A: The substance also called matter having fixed shape and fixed volume?

Q: When a substance changes from a liquid to a solid, which of the following is TRUE? a) b) c) The…

A: There are more attraction forces between the particles of solid than that of liquid.

Q: Diamond is a strong and hard material that does not conduct electricity. Verify this statement.

A:

Q: Evaporation of alcohol is a physical change. Select one: O True O False

A: The change is said to be a physical change if there is no change in the chemical composition of the…

Q: Describe the characteristic movement of the particles of solid, liquid and gas and arranged them in…

A:

Q: Temper From solid to gas O From gas to liquid O From liquid to gas Erom o to solid

A:

Q: What is the state of matter that can pour and takes the shape of its container?

A: Based on the most easily observable characteristic, solid has a definite shape and having a definite…

Q: 1. Classify the following as physical or chemical changes and exothermic or endothermic processes.…

A: If a process is reversible that by applying opposite force or any other way we get the same product,…

Q: When energy is added to a liquid, it’s particles begin to move what

A: When we add energy to liquid it’s particles begin to move as increase in motion occur and particles…

Q: In which of the following pairs of physical changes, are both changes endothermic?   a. freezing,…

A: The answer of the above question is given in step 2

Q: A student measured the boiling point of an unknown liquid to be 82.9 degrees celsius. After…

A: Addition of impurities to a compound increases its boiling point but lowers the melting point of…

Q: Write any 4 properties of gases and liquids.

A: Properties of gases 1. Gases are easy to compress. 2.Gases occupy far more space than solid and…

Q: Convert each temperature. a . 32 °p to 0 c (temperature at which water freezes) b. 77 K to 0 P…

A:

Q: A heating curve for water has been provided below. F A G D C Time Based on this graph, answer the…

A: 1. this is an endothermic graph as on y axis the temperature is increasingand so does the graph line

Q: The state of matter that has no definite volume or shape is Select one: Liquid Solid Liquid…

A: In chemistry, A matter is defined as any substance, that has mass and space carried by having…

Q: an endothermic phase

A:

Q: A chemical reaction takes place to allow instant cold packs to absorb energy. This is an example of…

A: Reactions that absorb heat from the environment are called endothermic reactions. A common example…

Q: List at least three physical properties of water.

A: State three physical properties of water.

Q: 31) H,O, H", heat OH

A: Benzene diazonium salts gives phenol in presence of H2O.H+ Again phenol undergoes coupling reaction…

Q: As a liquid sample is heated without a phase change, which physical property will decrease?  a)…

A: We know, volume increases with increasing of temperature due to increase in kinetic energy.  And we…

Q: Define the phases of matter and phase change?

A: The state of matter that is uniform throughout in physical state and chemical composition is known…

Q: minute 2 Hydrated copper(i) sulphate crystals were heated

A: Answers to all the parts of question 2 given in the following step

Q: .The amount of energy involved in melting a substance without changing its temperature is called the…

A: We know that, A) heat of vaporization: it is the amount of energy require to convert liquid into…

Q: The boiling point of water is 100 degree celcius Is the statement true or false ? If false write the…

A: We have to predict correctness of statement.

Q: When a new substance is formed with different properties than the original substance it is called a…

A: Answer:- This question is answered by using the simple concept of chemical change in which new…

Q: Celsius scale water freezes On the Celsius scale, water freezes at 32 degrees. True or False True…

A: Given statement is true or false ?

Q: Which state has more Kinetic energy?a) Liquid Water b) Solid water c) Water vapor

A: The kinetic energy is energy possessed by an object due to its virtue of motion.

Q: B. Complete the table below using the following terms (Solid, Liquid, Gas) Phase Change From To…

A: Here giving some properties related to phase of matter that is solid, liquid and gas from this we…

Q: Classify property as physical or chemical. the boiling point of ethyl alcohol

A: Ethyl alcohol has molecular formula CH3CH2OH. Its physical appearance is liquid state. It has highly…

Q: Which is a property of a nonmetal? A. Poor conductor of electricity B. Solid at room temperature C.…

A: We know that a nonmetal is Poor conductor of electricity

Q: A change in an adjective in a specific direction is an increase or decrease across a single cycle or…

A: The above given statement is related to the periodic table which is an easiest way for the…

Q: Mixture of water and POTASSIUM CARBONATE is an example of Homogeneous mixture Select one: O True O…

A: A homogeneous mixture is a mixture in which the composition of the mixture is uniform i.e same…

Q: What is occurring during the flat section of the graph below on the red arrow labeled melting,…

A: A heating curve is defined as the plot between temperature and heat that has been added to the…

Q: E. Evaluate Trections: Study each situation, Write Pifthe picture shows physical chan C for chemical…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for…

Q: Rank the states of matter in order of increasing kinetic energy. solid < liquid < gas gas < liquid <…

A: • The given states of matter is solid, liquid and gas.    • We need to arrange the given states of…

Q: lect one: D Plasma O Gas Solid P Liquid

A: State of matters are Solid  Liquid Gas  Plasma  BE

Q: temperature scales

A:

Q: True or False When a physical change occurs,  a change in state occurs which indicates that a new…

A: In a physical reaction the property of the component ramains same as before the reaction. e.g. Ice…

Q: 1 Select the correct answer. What changes occur at the molecular level when butter melts in a hot…

A: We have select the correct answer. What changes occurs at the molecular level when butter melts in a…

Q: Define physical changeand chemical change.State which type of change occurs in each of the following…

A: Any substance undergoing a physical change does not experience changes in the composition of the…

Q: Mixture of water and AMMONIUM CHLORIDE is an example of Homogeneous mixture Select one: O True False

A: True

Q: Mixture of water and LEAD SULPHATE is an example of Homogeneous mixture Select one: True False

A: The question is based on the concept of solutions. we have to determine whether lead sulphate…

Q: What property of matter is most responsible for the fact that sound travels at different speeds…

A: Answer

Q: What is Homogeneous substance? Give an example?

A: Homogenous substance or homogenous mixture is a phase in which we cannot differentiate the particles…

Q: Molecules possess the most amount of kinetic energy A. GAS B. LIQUID C. SOLID

A: Solid, liquid or gas are the states of the matter.  All are associated with some energies called…

Q: Label as a substance, heterogeneous mixture, or a solution: Beach sand substance O solution O…

A:

Q: Define physical change and list several common physical changes.

A: There are two types of change in matter; physical change and chemical change.

Q: Heat and Phase changes Phase changes Term used for Increase or decrease? Exothermic or phase change…

A: Phase change is defined as when one state of matter changes to another form. The phase change occurs…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.