Cracku brings to you the capsule — One Liners covering exam specific topics in Chemistry. Matter and its Nature. Current Affairs February Strong Acid: An acid, which dissociates completely or almost completely in water. Weak Acid: An acid that dissociates only partially when dissolved in water. Types of Bases:. Organic chemistry is the chemistry of carbon compounds, carbon which is an essential constituent of all Organic Compounds discovered till today.
Known for inventing dynamite and the founder of Nobel Prize instituted in Alfred Nobel v A Russian chemist and inventor who has formulated the Periodic Law, created a farsighted version of the periodic table of elements. Dmitri Ivanovich Mendeleev v A noted Scottish physician and chemist, known for his discoveries of Magnesium, latent heat, specific heat, and carbon dioxide Joseph Black v A Scottish physician, chemist and botanist who is credited with the discovery of nitrogen in Daniel Rutherford v A Cornish chemist and inventor, who is best remembered today for the discovery of multiple important elements essential for Humans — Pottasium, Calicium, Barium, Boron, Sodium Sir Humphry Davy v A British chemist who received the Nobel Prize in Chemistry in for the discovery of noble gases.
Sir William Ramsay v English chemist and meteorologist who pioneered studies of Atomic Theory and who is credited with the discovery of color Blindness and is often considered as one of the founders of Modern Chemistry John Dalton v A Swedish chemist often considered as the founders of Modern Chemistry and is known for discovery of important elements — Silicon, Thorium Baron Jons Jacob Berzelius v A German Chemist considered as the father of Nuclear Chemistry and winner of Noble Prize in Chemistry in for discovery of Nuclear Fission Otto Hann v A Jewish chemist who received the Nobel Prize in Chemistry in for his invention of the Haber—Bosch process.
Three scales to measure Temparature Diamond. Save my name, email, and website in this browser for the next time I comment. Submit Code. Enter verification code:. Send verification text to phone:. Gave the wrong phone number? Edit Number. Set a different course as default. Sign in.Radicals - Radical class 9 - Valency of Radicals - Basic and Acidic Radicals -Vivo chemistry
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Chemistry Notes PDF for RRB & SSC Exams – General Science
You have entered an incorrect email address! Verify Email Address Send verification to. Please wait for 0 seconds to resend the email. Resend Email. Your email has been successfully verified. Please wait for 0 seconds to resend the verification code.Solution 1. A symbol is the short form which stands for the atom of a specific element or the abbreviations used for the names of elements.
Solution 2. In most cases, the first letter of the name of the element is taken as the symbol for that element and written in capitals e. In cases where the first letter has already been adopted, we use a symbol derived from the Latin name e. In some cases, we use the initial letter in capital together with a small letter from its name e.
Solution 3. Solution 4. Co stands for Cobalt. If we write CO, then it would mean that it is a compound containing two non-metal ions, i. Solution 5.
Solution 6. The number of atoms of an element that join together to form a molecule of that element is known as its atomicity. Diatomic molecules: H 2O 2N 2Cl 2. Solution 9. Chemical formula: The chemical formula of a substance element or compound is a symbolic representation of the actual number of atoms present in one molecule of that substance.
It also indicates the fixed proportion by weight in which atoms combine. Solution 10 a Acid radical: The electronegative or negatively charged radical is called an acid radical. Solution 10 b Basic radical: The electropositive or positively charged radical is called a basic radical.
Solution Chemical names of compounds:. Solution 18 a iii. The formula of a compound represents a molecule. Solution 18 b iii. Solution 18 c iv. Balanced chemical equations:. Solution 4 a This equation conveys the following information:.
Solution 7. This is possible only, if total number of atoms on the reactants side is equals to total number of atoms on products side.State the formula of the sulphate and the hydroxide of the metal X. Write the balanced equation for the combustion of X in oxygen.
Additional Questions. Question 1. This means symbol stand for a specific element. No two elements can have the same symbol. Quantitative meaning : A symbol also represents quantity of the element i. Symbol C represents 12 g of carbon. Question 2. Name three metals whose symbols are derived from :.
Question 3. Question 4. Question 5. Give examples of eight metals which shows variable valency. State the valency of sulphur in :. Answer: Eight metals which show variable valency are. Question 6. State the valency in each case and name the following elements or radicals given below Answer:. Question 7. State the variable valencies of the following elements and give their names.
New Simplified Chemistry Class 9 ICSE Solutions The Language Of Chemistry
Question 8. Question 9. State the main characteristics of a compound with special reference to the compound iron [II] sulphide. Question Representation known as chemical formula i. Molecular formula of zinc carbonate : Zinc and carbonate both have valency.
Write the formula of the following compounds : Answer:. Write the names of the following compounds : Answer:. Products : Substances formed in the reaction are called products.Students must go through the revised syllabus to know the topics to be covered in the current academic year This is the revised syllabus which board has published on its official website.
Students may read as well as download the complete syllabus in PDF. Going through this syllabus will help you know the complete list of topics to be studied throughout the year along with other learning activities to excel in the Science subject.
Practical Assessment should be continuous. There will be a weightage of 5 marks towards the final result. All practicals listed in the syllabus must be completed. Portfolio to be prepared by the student- This would include classwork, other samples of student work, self-assessment and peer-assessment. This will carry a weightage of 5 marks towards the final results. Nature of matter: Elements, compounds and mixtures. Heterogeneous and homogenous mixtures, colloids and suspensions.
Particle nature, basic units: Atoms and molecules, Law of constant proportions, Atomic and molecular masses. Structure of atoms: Electrons, protons and neutrons, valency, chemical formula of common compounds. Isotopes and Isobars.
Cell - Basic Unit of life: Cell as a basic unit of life; prokaryotic and eukaryotic cells, multicellular organisms; cell membrane and cell wall, cell organelles and cell inclusions; chloroplast, mitochondria, vacuoles, endoplasmic reticulum, Golgi apparatus; nucleus, chromosomes - basic structure, number. Tissues, Organs, Organ System, Organism: Structure and functions of animal and plant tissues only four types of tissues in animals; Meristematic and Permanent tissues in plants.
Health and Diseases: Health and its failure.
Balancing Redox Reactions
Infectious and Non-infectious diseases, their causes and manifestation. Diseases caused by microbes Virus, Bacteria and Protozoans and their prevention; Principles of treatment and prevention. Pulse Polio programmes. Motion: Distance and displacement, velocity; uniform and non-uniform motion along a straight line; acceleration, distance-time and velocity-time graphs for uniform motion and uniformly accelerated motion, derivation of equations of motion by graphical method; elementary idea of uniform circular motion.
Elementary idea of conservation of Momentum.
Selina Concise Chemistry Class 9 ICSE Solutions The Language of Chemistry
Work, energy and power: Work done by a Force, Energy, Power; Kinetic and potential energy; Law of conservation of energy. Note: Learners are assigned to read the below listed part of Unit IV.
They can be encouraged to prepare a brief write up on any one concept of this Unit in their Portfolio.A reaction in which a reducing agent loses electrons while it is oxidized and the oxidizing agent gains electrons while it is reduced is called as redox oxidation — reduction reaction. An unbalanced redox reaction can be balanced using this calculator.
Redox Reaction is a chemical reaction in which oxidation and reduction occurs simultaneously and the substance which gains electrons is termed as oxidizing agent. Refer the following table which gives you oxidation numbers. Hence with the unequal number of oxygen molecule charges, the chemical equation is said to be unbalanced. Let us learn here how to balance the above unbalanced equation using half reaction method with step by step procedure.
To balance the unbalanced oxygen molecule charges, we add 2 in front of the product on R. We get. In order to balance the same, we add an another 2 in front of Hydrogen on the L. Hence with the unequal number of oxygen molecule charges the chemical equation is said to be unbalanced. To balance the unbalanced chloride molecule charges, we add 2 in front of the chloride on L. This is how the redox equations are balanced. Yes No. Your email address will not be published.
Balancing Redox Reactions. Was this helpful? Leave a Reply Cancel reply 23 Your email address will not be published. Kimberly I Perez. Tyler King. Sunila Sharma.In water chemistry, several different concentration quantities and units are in use. This is both for historic reasons, and due to different conventions in different fields of application. Table 1: Factors for conversion of different concentration units.
Table 2: Data about selected ions occuring commonly in natural waters. Take the term for determining the conversion factor from table 1. Keep in mind that the initial quantity is found in the leftmost table column, while the target quantity is listed in the upmost table row. Take the molar mass M and the valency z from table 2 as required. Note: The above formula does not take into account any unit conversions, meaning that you have to insert the conversion factor without any units if applicable.
Example: Convert the equivalent concentration 2. Inserted into the above formula: 2. In water chemistry analyses, concentrations of individual dissolved ions e. Further, concentrations of non-ions or of only partially dissolved substances are usually also denoted as a mass concentration, for example the concentration of total suspended solids TSSdissolved gases e. Concentrations of groups of ions e. The mass fraction is defined as the mass of a dissolved substance divided by the mass of the solvent here: water.
The molar concentratonsymbol cis defined as the amount of substance of a dissolved substance divided by the volume of the solvent here: water. In water chemistry analyses, the concentration of groups of fully dissolved ions e.
The equivalent concentrationsymbol c eqis defined as the amount of substance of a dissolved substance divided by the volume of the solvent here: watermultiplied with the valency, symbol zof the diluted substance. Thus, p H allows predictions about the acidic or basic properties of a water. Table 3: Relations between hydrogen ion activity and the acidic or basic properties of water based on p H.
In case of diluted aqueous solutions, the above relations can be used directly for determining the concentrations of known strong acids or strong bases. Many chemical processes in aqueous solutions are directly influenced by p H, among others the solubility of calcium carbonate limesilicic acid, or iron compounds. On the other hand, p H is affected by the addition of acidic or basic substances, depending upon the buffer capacity of that aqueous solution.
The buffer capacity depends mainly upon the dissolved substances in the water, and upon related — and in many cases quite complex — equilibrium reactions. In natural waters, the buffer capacity is mainly related to the equilibrium of calcium carbonate and carbonic acidand is denoted by the m-alkalinity or total alkalinity in regards to acids, and the p-acidity in regards to bases.
The dissociation constant for the self-ionisation of water increases with increasing water temperature. In many technical processes, p H is a critical parameter for process control and monitoring. In water chemistry, electrical conductivity is used as a non-specific indicator for the concentration of electrolytes in an aqueous solution.
Chemically pure water is a very poor conductor for electric current. With increasing electrolyte concentration, the electrical conductivity of water also increases. In water chemistry, electrolytes are substances which, when being dissolved in water, dissociate into their ionic compounds, meaning into positively charged cations e. Accordingly, the electrical conductivity only allows for conclusions about the concentration of ionically dissolved substances, but not about the concentration of non-dissolved solids e.Azure Development With this Preview, Visual Studio now supports configuring continuous delivery to Azure for Team Foundation Version Control (TFVC), Git SSH remotes, and Web Apps for containers.
WCF Connected Services The WCF Web Service Reference connected service provider now supports updating an existing service reference. Try it out today. Christine Ruana, Principal Program Manager, Visual Studio Christine is on the Visual Studio release engineering team and is responsible for making Visual Studio releases available to our customers around the world.
Scott Galloway, Founder, L2Louis Paskalis, SVP, Customer Engagement and Investment, Bank of America, takes the stage to discuss the year ahead and what's most important when it comes to the nexus of marketing and technology. Louis Paskalis, SVP, Customer Engagement and Investment, Bank of America Interviewed by: Kevin Mannion, Chief Strategy Officer, Advertiser PerceptionsDamian Garbaccio, EVP, Nielsen Marketing CloudIn this information-packed, highly-caffeinated session, eMarketer Co-founder and Chief Innovation Officer Geoff Ramsey will paint a vivid picture of where marketing is headed in 2018, covering the latest trends in ad:tech, data management, programmatic media buying, marketing attribution and native advertising.
Armed with a tsunami of facts and figures, he will also highlight the landscape and implications for critical emerging technologies such as artificial intelligence, voice recognition and AR and VR. Geoff Ramsey, Co-founder and Chief Innovation Officer, eMarketerWithin advertising and marketing, industry trade associations have long represented specific groups of expertise and helped craft a more innovative and efficient future for their memberships.
In this discussion, the top trade association executives from the ANA, 4As and IAB come together to review the key trends and critical initiatives for the year ahead. Seth Dallaire returns to the Industry Preview stage to discuss the company's latest work with brands. Seth Dallaire, VP, Global Advertising Sales and Marketing, Amazon Media Group Interviewed by: Kelly Liyakasa, Senior Editor, AdExchangerThe "buzz" around blockchain and cryptocurrencies is reaching new heights - to say the least - and 2018 appears to be another stepping stone in its use across currencies and elsewhere.
Sandra Ro discusses its importance and what blockchain will mean for consumers and businesses in the year ahead. Mark Zagorski, CEO, TelariaNetworks have embraced OTT in earnest. ESPN, CBS and Turner are among those pursuing VOD and SVOD on connected TV devices. This discussion will range across the production, distribution and monetization of content delivered on cable TV as well as Roku, Apple TV and Chromecast devices.
CEO Michael Roth will talk about the bets Interpublic Group is making as it helps global clients connect with their current and future customers. In this session, Oracle Data Cloud SVP Eric Roza and Moat cofounder Jonah Goodhart will talk about the platform vision and how they're making it a reality.
Jonah Goodhart, SVP, Oracle Data Cloud Eric Roza, General Manager and SVP, Oracle Data Cloud Interviewed by: Ryan Joe, Managing Editor, AdExchangerInvestment drives innovation as industry participants know well. With that in mind, Dan Salmon provides his Wall Street perspective on some key trends to consider across the marketing technology landscape in the year to come.
Dan Salmon, Equity Research Analyst, BMO Capital MarketsThis featured fireside chat will be announced shortly and include a discussion with a key industry leader in the year ahead.
Guided by his unique journey from corner store to corner office, SAP CEO Bill McDermott will present his analysis on the state of marketing as the enabler of the consumer-driven growth revolution. He will also share secrets from his boardroom conversations with Fortune 1000 CEOs around the world.
Bill McDermott, CEO, SAPJohn Ebbert, Publisher, AdExchangerGoogle VP Brad Bender will discuss the company's evolving advertiser business. How does NBCU juggle traditional "Upfront" sales, advanced TV, digital programmatic and cooperative sales with key partners like Apple and Vox. Jon Suarez-Davis, Chief Strategy Officer, Salesforce Marketing Cloud, SalesforceIBM continues to augment and develop its technology strategy in service to marketers. This fireside chat looks at "what's next" through the lens of the company's Chief Digital Officer, Bob Lord.
Bob Lord, Chief Digital Officer, IBM Interviewed by: Zach Rodgers, Executive Editor, AdExchangerThe last few years have given the "principals" in the programmatic transaction - marketers and publishers - plenty of reasons to question its value.
From brand safety to ad fraud to agency rebates and price transparency issues, ad tech has had its share of trouble. And yet the industry continues to grow in spite of it all. Is 2018 the year the technology ecosystem moves beyond its "trust issues".
This panel will explore the question, and provide a roadmap for how to move forward. Barrett, CEO, Rubicon Project Brian O'Kelley, CEO and Co-Founder, AppNexus Brett Wilson, VP and General Manager, Advertising, Adobe Moderated by: Sarah Sluis, Senior Editor, AdExchangerThe General Data Protection Regulation (GDPR) is an effort by the European Commission to shift the balance of power in favor of consumers so that they can determine and command when a company can or cannot use their personal data to drive business decisions.
This session will explore how your strategies, technologies and operations must change to be compliant with the Regulation, and how good, early preparation will help you thrive in this stricter environment. Melissa Parrish, VP, Research Director, ForresterA special presentation from the native advertising software company, Sharethrough.