1. Why do HCl, HNO3, etc., show acidic characters in aqueous solutionswhile solutions of compounds like alcohol and glucose do not show acidiccharacter?2. Why does an aqueous solution of an acid conduct electricity?3. Why does dry HCl gas not change the colour of the dry litmus paper?4. While diluting an acid, why is it recommended that the acid should beadded to water and not water to the acid?5. How is the concentration of hydronium ions (H3O+) affected when asolution of an acid is diluted?6. How is the concentration of hydroxide ions (OH–) affected when excessbase is dissolved in a solution of sodium hydroxide?Figure 2.6Figure 2.6Figure 2.6Figure 2.6Figure 2.6 Variation of pH with the change in concentration of H+(aq) and OH–(aq) ionsRationalised 2023-24

Question 25 (4 points) Identify the properties of an acid more than 1 can be selected Question 25 options: litmus paper turns red feels slippery produces hydrogen gas when reacting with metals can produce ammonia gas classified as an electrolyte a molecular compound dissociates when colliding with water molecules decreases the hydroxide ion concentration Question 26 (4 points) Select the properties of a base. More than one can be selected. Question 26 options: NH3 is an example the concentration of H+ could be 3x10-9mol/L litmus paper turns red has a pH above 7 increases the hydroxide ion concentration they react with carbonates H3PO2 is an example they are proton acceptors Question 27 (3 points) Which of the following are examples of chemicals using ionization to form ions? [More than one can be selected] Question 27 options: salt in water weak base in water weak acid in water strong acid in water sugar in water strong base in water Question 28 (4 points) Match the term with the correct description. Question 28 options: The smaller amount in a solution A mixture that has a uniform appearance The substance that separates the ions in a solution the process of adding more solvent to a solution the maximum amount of solid that has dissolved in a solvent a example of a solution involving solids Two substances that have no limits in terms of mixing A solid that does not dissolve in a liquid 1. solute 2. solvent 3. homogeneous 4. miscible 5. insoluble 6. saturated 7. dilute 8. alloy

1. Explain the term Species2. In the neutralization reaction, What happens to the pH of the acid  solution.3. Explain, what happens to the pH of an alkali solution during the neutralization reaction??4. For the reaction HCl + Ca CO3 -> Ca Cl2 + CO24a. Suggest 2 observations that makes you confirm a chemical reaction have taken place

Select all that applyWhich describe how changes in the concentrations of hydrogen ions and hydroxide ions in an aqueous solution are related?Multiple select question.An increase in the concentration of hydrogen ions causes an increase in the concentration of hydroxide ions.An increase in the concentration of hydrogen ions causes a decrease in the concentration of hydroxide ions.An increase in the concentration of hydroxide ions causes a decrease in the concentration of hydrogen ions.An increase in the concentration of hydroxide ions causes an increase in the concentration of hydrogen ions.Need help? Review these concept resources.

Take about 1g solid NaCl in a clean anddry test tube and set up the apparatus asshown in Fig. 2.4.n Add some concentrated sulphuric acid tothe test tube.n What do you observe? Is there a gas comingout of the delivery tube?n Test the gas evolved successively with dryand wet blue litmus paper.n In which case does the litmus paper changecolour?n On the basis of the above Activity, what doyou infer about the acidic character of:(i) dry HCl gas(ii) HCl solution?

An acid ionizes to produce hydrogen ions and a base contains a hydroxide group and dissociates to produce hydroxide ions in aqueous solution, according to the model.