Simple chemistry questions and answers. Periodic Table Questions 2022-10-02

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Chemistry is a branch of science that deals with the study of the properties and behavior of matter. It is a fundamental part of our everyday lives, as it helps us understand the world around us and how different substances interact with one another. In this essay, we will explore some simple chemistry questions and answers to help you understand this fascinating subject better.

  1. What is an element?

An element is a basic chemical substance that cannot be broken down into simpler substances by chemical means. Elements are the building blocks of matter and are made up of atoms, which are the smallest units of matter that retain the properties of an element. There are 118 known elements, each with its own unique properties and characteristics. Examples of elements include hydrogen, oxygen, carbon, and gold.

  1. What is a compound?

A compound is a chemical substance made up of two or more elements that are chemically bonded together. Compounds can be broken down into their constituent elements by chemical means, but the properties of a compound are different from those of its constituent elements. Examples of compounds include water (H2O), salt (NaCl), and sugar (C12H22O11).

  1. What is a molecule?

A molecule is a group of atoms that are chemically bonded together and behave as a single unit. Molecules can be made up of one or more types of atoms and can be either elements or compounds. For example, oxygen (O2) is a molecule made up of two oxygen atoms, while water (H2O) is a molecule made up of two hydrogen atoms and one oxygen atom.

  1. What is a chemical reaction?

A chemical reaction is a process in which atoms are rearranged to form new substances. During a chemical reaction, bonds between atoms are broken and new bonds are formed, resulting in the creation of one or more new substances. Chemical reactions can be either exothermic, in which energy is released, or endothermic, in which energy is absorbed.

  1. What is the mole?

The mole is a unit of measurement in chemistry that is used to express the amount of a substance. It is defined as the amount of a substance that contains as many atoms, molecules, or ions as there are atoms in exactly 12 grams of carbon-12. The mole allows chemists to express the mass of a substance in terms of the number of atoms, molecules, or ions it contains.

In conclusion, chemistry is a fascinating subject that helps us understand the world around us and the properties and behavior of matter. These simple chemistry questions and answers provide a basic introduction to some of the fundamental concepts of chemistry and will help you understand this complex subject better.

2. Simple classification of substances Questions and Answers

simple chemistry questions and answers

Organic chemistry began with the investigation of chemicals derived from living beings. Add water to the remaining mixture, stir and filter. The evolved hydrogen, collected over mercury at 0°C has a volume of 1. What is the name of the process by which plants convert sunlight into chemical energy? Answer: If the electronic configuration is known, then the valency of an element is determined by the number of valence electrons present in the outermost shell, i. It is always positive Q11. While moving down in a group, the metallic character …………. Give two reasons why a luminous flame is not 20.

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Metals Questions and Answers

simple chemistry questions and answers

Name the process which takes place when: a Solid Carbon Iv Oxide dry ice changes directly into gas b A red litmus paper turns white when dropped into chlorine water c Propene gas molecules are converted into a giant molecule 5. Answer: Mixture of metal and mercury. Answer: Heating in the absence of air. It is dependent on the temperature, volume and solubility of the solute. What is meant by melting point and boiling point of a substance? Negatively charged electrons whirl about the nucleus in a variety of orbital shells. D had separated into two spots which had moved 6cm and 8cm On the diagram above; I.


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20 Questions Chemistry Quiz

simple chemistry questions and answers

It does not depend on the type of reaction the solute undergoes. Not interested in chemistry at all? Calculate the molecular formula of the hydrocarbon gas. Who is widely considered the father of the modern periodic table? So, give your best and try to score as much as you can by giving the right answer. They are suitable for use on live tissues. HCl forms magnesium chloride, aluminum chloride, and hydrogen. As a result, he was able to forecast what those yet-to-be-discovered elements will be like. Classify the following processes as chemical changes or physical changes Process physical or chemical Neutralization ……………………………………… Sublimation ……………………………………… Fractional distillation ……………………………………….

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100 Chemistry Questions and Answers

simple chemistry questions and answers

A student left some crushed fruit mixture with water for some days. . Click the PDF to check the answers for Practice Questions. The set-up of apparatus below are the mixture. It has two valence electrons, belongs to group 2, and has three shells; therefore, it is in the third period. What were the criteria used by Mendeleev in creating his Periodic Table? Round 1 1 — What is the name for the fear of chemicals and chemistry? Answer: Chemistry is the study of atoms and molecules, as well as their properties.

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CHEMISTRY TOPIC BY TOPIC QUESTIONS AND ANSWERS

simple chemistry questions and answers

Periodic Table Chemistry Questions with Solutions Q1. Label the baseline origin II. Our latest Chemistry Quiz Questions and Answers is a great way to test your knowledge of chemistry. What is the molarity of a solution containing 5. Metallic hydrides are solid, whereas molecular hydrides are gaseous.

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Chemistry Questions

simple chemistry questions and answers

Answer: Number of moles of solute in one liter of the solution. How many elements are there in the a: 110 b: 114 c: 116 d: 118 10. Answer: The position of an element depends upon the number of valence electrons that rely on its electronic configuration. Simple classification of substances Questions 1. The following diagram shows a paper chromatogram of substances A, B, C, and D which are coloured a Indicate the solvent front on the chromatogram b Which substance is pure? Evaporate the future to get R. Simple classification of substances Answers 1.

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Chemistry Quiz: 50 Easy Chemistry Trivia Questions & Answers 2022

simple chemistry questions and answers

In contrast, if the element has a valence electron of more than 4, its valency would be equivalent to 8 — the number of valence electrons. If you have any doubts related to the Chemistry question PDF topic. What will be its molecular formula? Electron Gain Enthalpy Electronegativity 1. It's OKto miss a question or two. You know your stuff! Q6: The product of atomic mass and metal specific heat is about 6.

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20 Fun Chemistry Quiz Questions and Answers

simple chemistry questions and answers

The set-up below was a Name the apparatus missing in the set-up b Give one example of mixture T c What is the name of this method of separation 27. The Sun emits this harmful radiation, which is exceedingly deadly. Sodium hydrogen carbonate 18. It is dependent on the temperature, volume and solubility of the solute. .


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Periodic Table Questions

simple chemistry questions and answers

If you are not clear with your basics, then the quiz might be very tough for you. The diagram below shows chromatograms of blood samples obtained from One athlete a Name the line marked M …………………………………………………. For one thing, chemistry is everywhere in the world around you, so brushing up on it will help you choose the best foods, medicines, and household products. Add cold water to the mixture, and stir to dissolve R. Heat and electricity conductors, these hydrides are.

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