: Impact of acid rain on marble and limestone structures, which contain calcium carbonate. Resource Links for Answers
: If a chemical accidentally splashes into the eyes, they should be washed immediately with plenty of water. Chemical Reactions (Integrated Exercises) new mastering science workbook 2b answer chapter 9
: Critical focus on handling corrosive substances, wearing safety goggles and gloves, and basic first aid for acid/alkali splashes. Practical Applications covered in Chapter 9 : Impact of acid rain on marble and
| Section | Question No. | Correct Answer | | :--- | :--- | :--- | | Section 9.1 | Fill-in-blanks (1-5) | 1. electric circuit, 2. closed, 3. ammeter, 4. series, 5. voltmeter | | Section 9.2 | Multiple Choice (Q1) | B (Current is the same everywhere in series) | | Section 9.2 | Multiple Choice (Q2) | C (Adding resistors in parallel decreases total resistance) | | Section 9.3 | Numerical Problem | 0.5 A (Given 6V and 12Ω: I = 6/12) | | Section 9.4 | True/False (Q3) | False – An electromagnet requires a current to work. | | Section 9.5 | Circuit drawing (Q2) | (Parallel circuit with a switch on the main line before branching) | Practical Applications covered in Chapter 9 | Section
: Alkaline (the higher the number, the stronger the alkali).
This section tests knowledge on how to measure the strength of an acid or alkali using chemical changes. Indicator Type Colour in Acid Colour in Alkali Colour in Neutral Purple (or stays same) Natural Indicator (Red Cabbage) Red / Pink Green / Yellow Universal Indicator Red / Orange / Yellow Blue / Violet