To watch online these pdf files, there must be a pdf viewer installed on your device. Here are the download or preview links:. Education is very expensive nowadays. Our only purpose is to educate everyone for free. We want to bring an educational revolution. Our aim is that nobody should be left behind, everyone should get knowledge and quench his thirst for knowledge.
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We provide the following courses of intermediate classes: Pre Medical - in which Physics, Chemistry and Biology are the main subjects.
Pre Engineering - in which Chemistry, Physics and Mathematics are the main subjects. Toggle navigation. Comment here:. Aim and Purposes: Education is very expensive nowadays. Report a mistake: EducatedZone has been working for the help of students since Pages Home. Our daily needs of food, clothing, shelter, potable water, medicines etc.
We always owe a debt to chemists for their important contributions for giving us life saving drugs, synthetic fibres, synthetic detergents, variety of cosmetics, preservatives for our food, fertilizers, pesticides etc. There is no aspect of our life that is not affected by the developments in chemistry.
Thus the mankind owes much to chemistry because it has improved the quality of life. Dye is a natural or synthetic colouring matter which is used in solution to stain materials especially fabrics.
All the coloured substances are not dyes. A coloured substance is termed as a dye if it fulfils the following conditions. InOtto witt put forth a theory as to correlate colour with molecular structure constitution. The theory is named 'The Chromophore Auxochrome Theory' and its main postulates are. Dyes and Pigment Quiz 1. The blue print process involves the use of. SOL: c The blue print process involve the use of iron compound.
An azo dye is formed by interaction of an aromatic diazonium chloride with.Science Quiz - Chemistry ( रसायन विज्ञान) - Science Gk : SSC , MPPSC , UPPCS , RAS/RTS , CDS , NDA
SOL: b A mordant is any substance which can be fixed to the fibre and which can be dyed later on mostly hydroxide or basic salts of chromium aluminium and iron are used as mordant. A dye which imparts different colours in the presence of different mordant is referred to as a mordant dye.
For ex. It imparts rose red colour to fabric but the same fabric is dyed blue when it is mordanted with barium salt and it dyes violet is mordant with Ferric salt.
Which of the following is an example of basic dye. SOL: b Basic dyes contain NH2 or —NR2 groups as colour bearing group or colour enhancing groups they are generally used for Wool, cotton, leather, paper, polyester, nylon etc.
SOL: b Direct dyes stick to the fibre through hydrogen bonding. They belong to the class of azo dyes. They are used to dye the fabric directly by placing it in not aqueous solution of dye e. SOL: c Disperse dye are usually applied in the form of dispersion of finely divided dye in a soap solution in the presence of Phenol, Cresol, Benzoic acid etc. They are mainly used to dye decron, nylon, synthetic fibre.
MCQ on Chemistry in Hindi [Question Bank Set 1]
Example Celliton blue. Malachite green is a direct dye for silk and wool. It is prepared by condensing. SOL: a Malachite green prepared by the condensation of Benzaldehyde and dimethyl aniline. Fluorescin, a well known dye is obtained by the reactions of. Identify the wrong statement regarding alizarin. Methyl orange is an indicator in acid-alkali titration. It gives. A dye imparts red colour on fabric. What colour of light was absorbed by the dye. Which of the following is an azo dye.
A medicine which promotes the secretion of urine is called. Lysergic and diethyl amide LSD. Acetoxy benzoic acid is. SOL: b Acetyl salicylic acid is also called acetoxy benzoic acid.Potassium dichromate is not a self indicator.
Self indicator is a chemical which takes part in titration and itself indicate the end point of titration. Potassium dichromate requires an indicator for visual end point work. Ceric sulphate, iodine and potassium permanganate are self indicators. The standard electrode potential of hydrogen electrode is 0. Hydrogen's standard electrode potential E 0 is declared to be zero at all temperatures. Potentials of any other electrodes are compared with that of the standard hydrogen electrode at the same temperature.
The electrolytic solutions in a Daniel cell are connected by a salt bridge. The salt bridge provides an electric contact between the two electrolytic solutions without allowing them to mix with each other. The half-reaction that involves loss of electrons is called oxidation reaction.
Similarly, the half-reactions that involve gain of electrons are called reduction reactions. The two equations do not have the same number of electrons. There are 2 in the copper reaction but only one in the silver reaction. Multiply everything in the silver reaction by 2 and then add the equations together to get the balanced ionic equation. Combination reactions occur when two reactants combine to form the products.
Standard electrode potential i. The oxidation process is visualised as a decrease in electron density. The oxidation process is visualised as a decrease in electron density, and reduction process as an increase in electron density around the atom s involved in the reaction. Both charge and mass conserves in an oxidation-reduction reaction. Zinc sulphide is white in colour and can be seen when the solution is made alkaline with ammonia.
In acid-base systems, the titration method is used for finding out the strength of one solution against the other using a pH sensitive indicator. Titration, also known as titrimetry, is a method of quantitative chemical analysis that is used to determine the unknown concentration of a known reactant.
Originally, the term oxidation was used to describe the addition of oxygen to an element or a compound. This is the principal reason that they commonly occur on the earth in the form of their oxides. The non-metal displacement redox reactions include hydrogen displacement and a rarely occurring reaction involving oxygen displacement.
While representing the redox couple, oxidized form is put before the reduced form. Reduction can be defined in terms of hydrogen transfer, as gain of hydrogen.
Iodide ions are oxidised by thiosulphate ions.When it comes to preparing examination, students who need to get exceptional position try to do almost all the ways that can lead them towards an exceptional level of result.
For intermediate students especially the part I students it is delightedly informed that 11th class chemistry online test system is arranged here. It is the first time going to happen that students will get the online MCQs test system in such a way that they will find in their final examination.
Yes, it is true that 11th class students also required to perform an objective paper which comprises MCQs quiz. Students are to inform that the test will are also arranged in the same manner. During your preparation once must go through these intermediate online MCQs test and see the result. Chemistry is the main subject of the science group at the intermediate level of education. It is compulsory for those who choose science group.
FSC students with pre-medical and pre-engineering studies are asked to study chemistry subject. At an intermediate level, it is not so easy. At matric level students have learned the subject with basic concepts but at an intermediate level, the subject is, somehow, difficult. Only those students get good grades at the end who pay well right from the beginning time of their study session. Students who are not satisfied with their preparation are to be said that just remove the signs of worries from and connect yourself at campus.
Students are provided with numbers of helping contents here. These are including on 1st year chemistry past papers and chemistry online video lectures. These are enough to make good practice and you know good practice is the guarantee of good grades.
Campus platform has a collection of questions added to 12 chapters of Physics 10th Class.
सामान्य विज्ञान (वस्तुनिष्ठ प्रश्न) परीक्षा के लिए
If you take an online MCQ test, our system will randomly choose 17 questions. And everytime you take another test, no question from the prevoius test will best will get repeated. Asslam-u-Alikum Dear lovely teachers and students test ke koi new updates hai campus pr agr hai to link send kry. Register here. Date Sheet Result Board Info. Roll Number Slip. See all Tests. See all in Messenger. Online MCQs Test Of Chemistry Class Students who are not satisfied with their preparation are to be said that just remove the signs of worries from and connect yourself at campus.
Recent Records. Zaeen shared a post link. Jun 24, Tushar Splendid. View more comments. Pirshotam shared a post link. Jun 06, Any guys competition with me Like 4 Comments. Shabi Which Competition?? Fizza which competition broo??????????? Mohsin shared a post link. May 06, I think decoloring agent is charcoal not conc.Practice the multiple choice questions mcqs to test understanding of important topics in the chapters.
Download latest questions with multiple choice answers for Class 9 all subjects in pdf free or read online in online reader free. Students should practice the multiple choice questions to gain more marks in exams.
Class 9 will have more multiple choice questions in the Class 9 all subjects question papers this time. The study material for NCERT for Class 9 all subjects has been made by experienced teachers of leading schools in India is available for free download.
Class 12th Chemistry Objective Question And Answer
Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning. This Olympiad assesses the environment quotient of students and also enhances their understanding on issues related to sustainable Kids are the Future of our Country!
Outlines have changed and so should the formats of existence! To keep the future generation safe in such unpredictable Competency is a set of skills, abilities, knowledge that helps an individual perform a given task in real life.
Every learning should go into the imbibing of these skills to lead a productive and joyful life. As a part of Shikshak Parv celebration, an online quiz competition on National Education Policy will be organized by the Ministry of Education, Govt. Previous Pause Next. Download solutions Free Sample Papers with solutions for Class 9, download in pdf. Printable Worksheets Download Class 9 all subjects worksheets. Practice tests for Class 9 for all subjects has been made for all important topics in NCERT book and is available for Notes Free revision notes, brief chapter explanations, chapter summary and mind maps for all important and difficult topics of CBSE Class 9 all subjects as per Also download collection of CBSE booksQuestion 1.
MCQ on Chemistry in Hindi [Question Bank Set 14]
Nitrogen atom of amino group is ………. Question 2. Which of the following should be most volatile? Question 3. Question 4.
Question 5. The most convenient method to prepare primary i Amine amine containing one carbon atom less is a Gabriel phthalmidie synthesis b Reductive amination of aldehydes c Hofmann bromamide reaction d Reduction of isonitriles.
Question 6. Identify the correct pathway to convert propanoic acid to ethylamine. The reagent represented by A, B and C are. Question 7. When excess of ethyl iodide is treated with ammonia, the product is a ethylamine b diethylamine c triethylamine d tetrathylammonium iodide. Question 8. Amides may be converted into amines by a reaction named after a Hofmann Bromide b Claisen c Perkin d Kekule.
Question 9. Question Secondary amines can be prepared by a reduction of nitro compounds b oxidation of N-substituted amides c reduction of isonitriles d reduction of nitriles.
Which of the following amides will give ethylamine on reaction with sodium hypobromide? Z in the reaction is a aniline b chlorobenzene c benzamide d benzoyl chloride. Which one of the following reducing agents is likely to be most effective in bringing about the following change? Amine that cannot be prepared by Gabricl-Phthalmidie synthesis is a aniline b benzyl amine c methyl amine d iso-butylamine. What is the end product in the following sequence of reactions?
Tertiary amines have lowest boiling points amongst isomeric amines because a they have highest molecular mass b they do not form hydrogen bonds c they are more polar in nature d they are most basic in nature. Which of the following amines will give carbylatnine reaction?
The end product Z of the reaction a propanenitrile b triethylamine c diethylamine d propylamine. Which of the following species are involved in the carbvlamine test?He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. And we want to hear from you. Please share your tips, shortcuts, best practices, and tall shop tales in the comments below and we might use your tip in a future column.
I assume you could find one, used, on auction for about half that. Do others here have experience with one of these. Currently, I use dollar store brass scrubbies as my cleaning medium. The results are pretty impressive and the low-melt alloy they used seems to not effect the sand at all. And, I have to have that melting pot they use. The review made a believer out of me and I instantly ordered one.
Not only will I use this in breaking down the significant amount of cardboard that I recycle, but I will use it for cutting both cardboard and Styrofoam for hobby projects. ChuckE2009 specializes in welding repair and fabrication. In this video, Chuck shares the tip of scoping out construction sites for scrap steel.
Visiting a local metal working shop is also a great way of getting chunks of steel to use as shop weights, either free or for a few bucks. Caroline Lewis, wife of Make: contributor, Andrew Lewis, is a specialist trauma care doctor in the U. I asked her to share a few maker-friendly first aid tips. This can help if you ever run out unexpectedly.
Not only might they be used for cutting bandages, they may also be called upon to cut through clothing and the like. Discover Newsletters Send us feedback on our site design, bugs, story ideas, maker community events and any other share-worthy thoughts. Make: and Maker Faire are registered trademarks of Maker Media, Inc. Please check your email. You will also be receiving the weekly Make: Newsletter to keep you inspired with new projects and more product reviews.
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