Download PDF Class 9 Chemistry Notes – Chapter 12 Empirical Data Collection and Analysis Textbook Exercise Solutions 1. Tick (✓) the Correct Answer (i) Which of the following pairs of quantities may be measured in the same unit? Answer: (c) Heat and work (both are forms of energy measured in joules). (ii) In which unit…
Download PDF Class 9 Chemistry Notes – Chapter 11 Hydrocarbons Textbook Exercise Solutions 1. Tick (✓) the Correct Answer (i) Which other atom is almost always present along with carbon atom in all organic compounds? Answer: (c) Hydrogen (ii) Which other metal can be used to reduce alkyl halides? Answer: (b) Mg (iii) If naphtha…
Download PDF Class 9 Chemistry Notes – Chapter 10 Environmental Chemistry 1. Tick (✓) the Correct Answer (i) Which gases are responsible for the greenhouse effect? Answer: (c) CO₂, CH₄ (ii) Indicate the source of sulphur which is responsible for the presence of oxides of sulphur in the atmosphere. Answer: (d) Combustion of fossil fuels…
Download PDF Class 9 Chemistry Notes – Chapter 9 Subject: ChemistryClass: 9thBoard: Punjab Board 1. Tick (✓) the Correct Answer (i) Which halogen will have the least reactivity with alkaline earth metals? Answer: (b) Iodine (ii) Which compound do you expect to be coloured? Answer: (d) NiCl₄ (iii) In which element do the strongest forces…
Download PDF Class 9 Chemistry Notes – Chapter 8 Subject: ChemistryClass: 9thBoard: Punjab Board Exercise Multiple Choice Questions (MCQs) (i) In which period and group will you place the element which is an important part of the solar cell? Answer: (a) Third period and 14th group. (ii) Identify the electronic configuration of the outermost shell…
Download PDF Class 9 Chemistry Notes – Chapter 7 Subject: Chemistry Class: 9th Board: Punjab Board Chapter 7: Acid Base Chemistry Exercise: Multiple Choice Questions (MCQs) (i) Which of the following is a strong acid? Answer: (c) HCl (ii) According to Arrhenius concept, an acid is a substance that produces: Answer: (a) H⁺ ions in…
Download PDF Class 9 Chemistry Notes – Chapter 6 Subject: Chemistry Class: 9th Board: Punjab Board Chapter 6: Equilibria Exercise: Multiple Choice Questions (MCQs) (i) What will happen if the rates of forward and reverse reactions are very high? Answer: (a) The equilibrium point will reach very soon. (ii) Predict which components of the atmosphere…
Download PDF Class 9 Chemistry Notes – Chapter 5 Subject: Chemistry Class: 9th Board: Punjab Board Chapter 5: Energetics Exercise: Multiple Choice Questions (MCQs) (i) The following reaction is an exothermic reaction: H₂ + Cl₂ → 2HCl (Sunlight). From where does the energy come to break the bonds of H₂ and Cl₂? Answer: (b) From…
Download PDF Class 9 Chemistry Notes – Chapter 4 Subject: Chemistry Class: 9th Board: Punjab Board Chapter 4: Stoichiometry Exercise: Multiple Choice Questions (MCQs) (i) How many atoms are present in one gram of H₂O? Answer: (c) 0.334 × 10²³ atoms (ii) Which is the correct formula of calcium phosphide? Answer: (d) Ca₃P₂ (iii) How…
Download PDF Class 9 Computer Science Notes Chapter 1 Chapter 1: Introduction to Systems Exercise Solution PART I: MULTIPLE CHOICE QUESTIONS (MCQs) 1. What is the primary function of a system? a) To work independently | b) To achieve a common goal | c) To create new systems | d) To provide entertainment Correct Answer:…
