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Oct 01, 2019 · 8.State the type of chemical reactions and chemical equations that take place in the following: (i) Magnesium wire is burnt in air. (ii) Electric current is passed through water. (iii) Ammonia and hydrogen chloride gases’are mixed. Answer. 9.(a) Write the essential condition for the following reaction to take place: 2AgBr—-> 2Ag + Br 2 Air freight booking
Which of the following statements about enzymes is not true. A. Enzymes are consumed during chemical reactions. B. Enzymes decrease the free energy of activation of specific reactions.

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In a chemical reaction, only the atoms present in the reactants can end up in the products. No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products. Summary

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Chemical change occurs when the atoms that make up one or more reactants rearrange themselves in such a way that new substances, called products, are formed. The reactants and products are the components of the chemical reaction system. A given chemical reaction system is defined by a balanced net chemical equation which is conventionally ...

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In any chemical reaction, chemical bonds are either broken or formed. The overall enthalpy of the reaction is negative, i.e., it's an exothermic reaction where energy is released in the form of heat. Let's draw an energy diagram for the following reaction

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A) chemical B) proactive C) syntropical D) mechanical 2) Which of the following is/are most susceptible to chemical weathering by dissolution? A) quartz B) clay minerals C) iron oxides D) calcite 3) Frost wedging is the major weathering process contributing to the formation of which regolith material? A) tropical laterites B) talus slopes C) C ...

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Chemical reactions involve breaking and making some (or even all) of the bonds that hold together the atoms of reactant and product molecules. Energy is required to break bonds, and since the strengths of different kinds of bonds differ, there is often a significant overall energy change in the course of a reaction.

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Which of the following statements is true about a chemical reaction? A) It involves changing the ways the atoms are grouped. B) In a chemical reaction atoms are neither created nor destroyed . C) In a chemical reaction mass is conserved. D) all of the above E) none of the above

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Any reaction in which two or more substances combine to form a single product is a direct union or combination reaction. The general form of a direct union reaction is A + B → AB This type of reaction generally takes place between the following types of compounds: a. A metal + non-metal 2 Na + Cl2 → 2 NaCl sodium chloride Fe + S → FeS

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Which of the following statements is true about a chemical reaction? A) It involves changing the ways the atoms are grouped. B) In a chemical reaction atoms are neither created nor destroyed . C) In a chemical reaction mass is conserved. D) all of the above E) none of the above

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Describes and explains the effect of changing the concentration of a liquid or gas on how fast reactions take place. Don't assume that if you double the concentration of one of the reactants that you will double the rate of the reaction. It may happen like that, but the relationship may well be more...

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45. The chemical equations are balanced to satisfy one of the following laws in chemical reactions. This law is known as: (a) Law of conservation of momentum (b) Law of conservation of mass (c) Law of conservation of motion (d) Law of conservation of magnetism. Solution: Option (b) is the answer.

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