Science Practice Quiz 17

Q1.Which anion is specifically mentioned as being present in Nitric acid (HNO3)?

A. Cl- B. SO4 2- C. NO3- D. CH3COO-

Q2.When sodium hydroxide (NaOH) is dissolved in water, what are the ions produced?

A. Na+ and H+ B. Na+ and OH- C. H+ and OH- D. NaH and O2

Q3.In a humid climate, what substance is recommended to be used in a guard tube (drying tube) to dry the gas produced during the preparation of HCl gas?

A. Sodium chloride B. Concentrated sulphuric acid C. Calcium chloride D. Litmus paper

Q4.Activity 2.9 describes the reaction of solid NaCl with concentrated sulphuric acid. What is the primary gas evolved in this experiment?

A. Oxygen gas B. Hydrogen gas C. Hydrogen chloride gas D. Sulphur dioxide gas

Q5.Based on the information provided, which form of HCl is expected to exhibit acidic character by changing the color of litmus paper?

A. Dry HCl gas B. Liquid HCl (pure) C. HCl solution D. Solid NaCl

Q6.According to the provided text, what is an alkali?

A. A base that is insoluble in water. B. An acid that dissolves in water. C. A base that dissolves in water. D. A salt formed from acid-base reaction.

Q7.Which of the following is a characteristic property of alkalis?

A. Sour to taste and non-corrosive. B. Soapy to touch, bitter, and corrosive. C. Sweet to taste and neutral. D. Smooth to touch and acidic.

Q8.What type of ions do bases generate in water, according to the provided information?

A. Hydronium (H3O+) ions. B. Hydroxide (OH–) ions. C. Hydrogen (H+) ions. D. Sulphate (SO42-) ions.

Q9.The process of dissolving an acid or a base in water is described as what kind of process?

A. An endothermic process. B. A reversible process. C. A highly exothermic process. D. A neutralization process.

Q10.What is the recommended procedure for diluting a concentrated acid?

A. Add water slowly to the concentrated acid with constant stirring. B. Add the acid slowly to water with constant stirring. C. Mix the acid and water rapidly without stirring. D. Heat the concentrated acid before adding water.

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Science Practice Quiz 17