Answer: Nucleic acids are biomolecules found in the nuclei of all living cells, as one of the constituents of chromosomes. In this type of adsorption, strong chemical bonds are formed between the adsorbate and the surface of the adsorbent. What do you understand by activation of adsorbent? There are two types of emulsions: a Oil in water type: Here, oil is the dispersed phase while water is the dispersion medium. This induced-fit model of enzyme action pictures the substrate inducing the active site to adopt a perfect fit, rather than a rigid shaped lock and key. They are very specific in nature and catalyse only a particular reaction for a particular substrate. In absorption, the substance is uniformly distributed throughout the body of a solid or a liquid. For this reason, the melting points and the solubility of amino acids in water is higher than those of the corresponding halo-acids.
Give an example of a micelle system. When the size of the solute particle lies between 1 nm and 1000 nm, it behaves as a colloid. The chapters end with self-evaluation questions. In such reactions, the products have very less affinity for the catalyst and are quickly desorbed, thereby making the surface free for other reactants. Solution: a Zeolites are hydrated aluminosilicates which have a three dimensional network structure containing water molecules in their pores. Answer Micelle formation is done by substances such as soaps and detergents when dissolved in water.
Give one example of each type. Referring to these solutions would help the student understand their mistake and make them cautious not to repeat it again. Group 16 Elements: General introduction, electronic configuration, oxidation states, occurrence, trends in physical and chemical properties, dioxygen: Preparation, Properties and uses, classification of Oxides, Ozone, Sulphur -allotropic forms; compounds of Sulphur: Preparation Properties and uses of Sulphur-dioxide, Sulphuric Acid: industrial process of manufacture, properties and uses; Oxoacids of Sulphur Structures only. Thus students are advised to follow these solutions and notes as not only they will help them to achieve more marks, but could also be used as the answer key to complete an assignment or homework faster. Similarly soap is a solution at low concentration but a colloid at higher concentration. It is usually soluble in water.
Discuss the effect of pressure and temperature on the adsorption of gases on solids. In aqueous solutions, the carboxyl group can lose a proton and the amino group can accept a proton, thus giving rise to a dipolar ion known as a zwitter ion. What are the factors which influence the adsorption of a gas on a solid? Answer i Oxidation of sulphur dioxide to form sulphur trioxide. It is generally found to be reversible in nature. However, at higher concentrations, these substances behave as colloidal solutions due to the formation of aggregated particles. Therefore, the latter are much less stable than the former. Now, as these micelles are negatively charged, they do not coalesce and a stable emulsion is formed.
Also, as the secondary and tertiary structures of a protein are destroyed, the enzyme loses its activity. During denaturation, the secondary and the tertiary structures of the protein get destroyed, but the primary structure remains unaltered. The polypeptide chain in this protein is folded around itself, giving rise to a spherical structure. First we upload the solutions of Maths in Hindi then Physics, Chemistry and Biology will be uploaded in Hindi Medium. This phenomenon takes place as particles of colloidal dimensions scatter light in all directions. Answer Enzymes are basically protein molecules of high molecular masses.
You can download Chemistry part 1 and Chemistry part 2 Solutions for all the chapters in our mycbseguide website and mobile app for free. Write in brief the mechanism of enzyme catalysis. For example: starch, nylon, cellulose, etc. Actinoids - Electronic configuration, oxidation states and comparison with lanthanoids. As the concentration of reactants on the surface of the catalyst increases, the rate of reaction also increases. Give one example of each. Group 18 Elements: General introduction, electronic configuration, occurrence, trends in physical and chemical properties, uses.
The sources of vitamin C are citrus fruits, amla, and green leafy vegetables. Such sols are called lyophobic sols. It depends upon the strength of chemisorption to a large extent. Gas Solid Solid foam Pumice stone 8. Ans: This phenomenon of attracting and retaining the molecules of a substance by a solid or a liquid on its surface resulting into a higher concentration of the molecules on the surface is known as adsorption. The modification to this law is : When oppositely charged sols are mixed in proper proportions to neutralize the charges of each other, coagulation of both the sol occurs.
This loss of biological activity by the protein is called denaturation. Why are hydrophobic sols easily coagulated? Positively charged particles move to the cathode, while negatively charged particles move towards the anode. This heterogeneous catalytic action can be explained in terms of the adsorption theory. Other than given exercises, you should also practice all the solved examples given in the book to clear your concepts on Solutions. The relationship is generally represented in the form of a curve where mass of the gas adsorbed per gram by the adsorbent is plotted against pressure.
Gas Liquid Foam Froth Question 5. This disturbance unfolds the globules and uncoils the helix. This makes the whole system neutral. In this structure, all the peptide chains are stretched out to nearly the maximum extension and then laid side by side. Monosaccharides are further classified as trioses, tetroses, pentoses, hexoses, and heptoses according to the number of carbon atoms they contain. A bag of suitable membrane containing the colloidal solution is suspended in a vessel through which fresh water is continuously flowing.