If the digit after the last digit to be retained is more than 5, the digit to be retained is increased by 1. e.g. =. 60, 40: C. 20, 30: D. 30, 20 . Most of the students complete this section in very less time as numerical and formula-based questions are usually not asked from this section. If prepared thoroughly, chemistry can help students to secure a meritorious position in the exam. Mixtures can be separated into constituents by following methods: Filtration can separate those mixtures whose one component is soluble in a particular solvent and other is not. Hydrolysis involves reaction of salts with water to form acidic or basic solutions. It is the reactant which is completely consumed during the reaction. It is the mass of each isotope determined separately and then combined in ratio of their occurrence. Find the atomic weight of X and Y, if the weight of 0.1... 2. Practice Now. It is obtained by adding atomic masses of various atoms present in the formula and this term replaces molecular mass in ionic compounds. 3%. Let A be solute & B is solvent then mole fraction of solute (xA), It is the number of parts by mass of solute per hundred parts by mass of solution. The 11th general conference of weights and measures in 1960 recommended the use of international system of units. NEET Chemistry Important Questions Chapterwise NEET 2020 is only a month ahead and it is essential for aspirants to have a proper study strategy to crack this medical entrance exam. This class will be beneficial for all the aspirants of NEET UG. Polymerisation is the combination of molecules of same or different substances to form a single molecule called polymer. The empirical formula of the compound would be (AIPMT 2008) A. 6 1 a.m.u. Gram molecular mass is also called one gram molecule. Crystallisation is a process of separating solids having different solubilities in a particular solvent. mass of base = Eqv. Vapour density  method : Vapour density is the ratio of volume of a gas to the mass of same volume of hydrogen under identical conditions. 5%. 2. The measurement reported by three students are as follows. The component of solution having larger proportion is solvent and others are solute. In comparison to Physics and Biology, Chemistry is the most scoring section. Critical Thinking. Pure substance consisting of one type of particles in the form of atoms eg. They may be homogeneous or heterogeneous. Electrochemistry. It is the simplest formula of a compound giving simplest whole number ratio of atoms present in one molecule. Atom is the smallest particle of element which might not be able to exist independently. A change which does not affect chemical composition and molecular structure is a physical change and the one that involves alteration of chemical composition and molecular structure is a chemical change. The same amount of metal can displace 2 g of hydrogen from an acid. (a) 1.806 × 1023. Stoichiometry : It is calculation of masses or volumes of reactants and products involved in a chemically balanced reaction. Practice Now. An equation having equal number of atoms of various kinds on both sides is a balanced equation. 1. mass of metal × valency. Distillation can be used to separate constituents of mixtures having different boiling points. Some Basic Concepts of Chemistry 2. An organic compound contains carbon, hydrogen and oxygen. They can be diatomic and polyatomic. Important formula. (b) 1.806 × 1022. MCQs on Some Basic Concepts of Chemistry for NEET 1. The law is valid for solid elements except Be, B, Si and C. Atomic mass = Eq. Thermodynamics. Thermodynamics 7. NEET 2021 will be conducted in the month of May 2021. Live your dream of studying at AIIMS with comprehensive coaching and guidance from seasoned mentors. It is the unit of representing atomic masses. 2%. Structure of Atom. It is the number of H+ ions that can be displaced from one molecule of a substance. Hey, I'm Rajan.I'm determined to make your exam score grow.Lets start the free course. The SI system has seven basic units of physical quantities as follows: The units obtained by combination of basic units are known as derived units e.g. (a) 18 molecules of water Solutions . Proposed by John Dalton in 1808. Revise Chemistry chapters using videos at TopperLearning - 6 Double decomposition or metathesis is the exchange of oppositely charged ion on mixing two salt solutions. This document is highly rated by MBBS students and has been viewed 5025 times. How to prepare for neet? 3. Free Download 31st years NEET Chemistry Chapter Wise and Topic Wise Solved Papers. If the digit after the last digit to be retained is equal to 5, the last digit is retained as such if it is even and increased by 1 if odd. It is the number of gram equivalents of a solute present in one litre of solution. mass of acid = Eqv. velocity is expressed as distance/time. Atoms of same elements are identical in physical and chemical properties. "It is the number of times the atom of the element is heavier than H atom" was the first proposed definition. (c) 18 grams... 3. 2.0 molar solution is obtained, when 0.5 mole solute is dissolved in : … Answer. That amount of substance whose mass in grams is equal to its molecular mass or the equivalently molecular mass of a substance expressed in grams is called gram molecular mass. Abbreviated as SI Units (after the French expression La System International de units). 207, Laxmideep Building Plot No. Mixtures are substances made of two or more elements or compounds in any proportion. If WA is mass of solute and WB the mass of solvent, then, It is the number of parts by volume of solute per hundred parts by volume of solution. mass of acid × Basicity, Mol. NEET Chemistry is divided into three sections, namely, Physical, Organic and Inorganic Chemistry. Which one will have maximum numbers of water molecules? It is the actual formula of a compound showing the total number of atoms of constituent elements e.g. Name of … Chemical Bonding and Molecular Structure. Chemical Kinetics. Pure substance consisting of molecules formed by the combination of atoms of different elements eg. Classification of Elements and Periodicity in Properties 4. Avogadro's number of gas molecules occupy a volume of 22400 cm3 at N.T.P. Normality depends on temperature. Also if strength is given in normalities, N1 of A & N2 of B. where W is the mass of liquid in gm. These important questions are prepared by our academic experts based on the syllabus guidelines prescribed by MCI. Download NEET UG Chemistry Some Basic Concepts MCQs in pdf, Chemistry chapter wise Multiple Choice Questions free, Case of B student : Measurements are close (precision) and accurate (Accuracy), Case of C student : Measurement are not close (no precision) and not accurate (no accuracy). Some Basic Concepts of Chemistry An Introduction of Some Basic Concept Of Physical Chemistry Vol-1. Later on oxygen was preferred as standard. Applications are: Deriving relationship between molecular mass and vapour density. Multiple Choice ... (NEET 2016) A. K 2 CO 3 vs HCl. 2%. In this session, Pankaj Talwar will discuss the basic concept of Physical Chemistry. Inorganic Chemistry for NEET. Displacement means replacement of one element of compound by another. (A) In Agriculture and Food: (i) It has provided chemical fertilizers such as urea, calcium phosphate, … Some Basic Concepts of Chemistry. none of the above. 2. Combustion is a complete and fast oxidation of a substance. 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