CBSE Class 7 Science Exploring Substances: Acidic Basic and Neutral (Class 7 NCERT New) Quiz 8

1. Turns litmus blue.

A Acids B Bases C Salts D All

2. What is shown here?

A a hydronium ion B a hydroxide ion C a water molecule D an acid

3. Acid + Base ₋-->

A salt + hydrogen B salt + water C salt + carbon dioxide + water D salt

4. HCl + NaOH →

A NaH + ClOH B NaCl + H2 C NaCl + H2O D NaCl + Cl2

5. The pH scale measures ____ and ____

A acidity and basic B the temperature C how fun a chemistry quiz is D none of the above

6. Ion

A A charged particle or atom B Compound formed between a metal and a nonmetal C Any group of compounds that produce H+ D Any group of compounds that produce OH-

7. Acid

A Any group of compounds that produce H+ ions B Any group of compounds that produce OH- ions C Ionic compound formed between a metal and a nonmetal D A charged particle, atom, or ion

8. Base

A Any group of compounds that produce H+ ions B Any group of compounds that produce OH- ions C Ionic compound formed from a metal and a nonmetal D A charged particle, atom, or ion

9. Concentration

A The reaction between an acid and a base which produces salt and water B Compound formed by a metal and a nonmetal C The amount of solute per unit of solution D Liquid indicator that changes pink in the presence of a base

10. Indicator

A Liquid indicator that changes pink in the presence of a base B A type of paper used to indicate the presence of acids and bases C a chemical that changes color in the presence of acids and changes a different color in the presence of bases D the amount of solute dissolved in solution