Download PDF Class 10 Chemistry — Chapter 11: Carboxylic Compounds Board: Federal Board 1. Multiple Choice Questions (MCQs) i. What is the product of the reaction between ethanoic acid and sodium carbonate? a) Sodium propanoateb) Sodium hydroxidec) Sodium chlorided) Sodium acetate Correct Answer: d) Sodium acetate (Sodium ethanoate) Carboxylic acids react with carbonates to…
Download PDF Class 10 Chemistry — Chapter 10: Hydroxy Compounds Board: Federal Board 1. Multiple Choice Questions (MCQs) i. What is the optimal temperature range for the fermentation of glucose to produce ethanol? a) (0–10^circ C)b) (25–35^circ C)c) (50–60^circ C)d) (70–80^circ C) Correct Answer: b) (25–35^circ C) Yeast enzymes operate best at warm ambient…
Download PDF Class 10 Chemistry — Chapter 09: Hydrocarbons Board: Federal Board 1. Multiple Choice Questions (MCQs) i. What are alkenes? They have one or more double bonds between carbon atoms and the general formula (mathrm{C_nH_{2n}}). When two carbon atoms share two pairs of electrons, they form a double bond. How many electrons are…
Download PDF Class 10 Chemistry — Chapter 08: Organic Chemistry Board: Federal Board 1. Multiple Choice Questions (MCQs) i. Which of the following correctly represents the formula for but-2-ene? a) (mathrm{CH_3CH=CHCH_3})b) (mathrm{CH_2=CHCH_2CH_3})c) (mathrm{CH_3CH_2CH=CH_2})d) (mathrm{CH_3Cequiv CCH_3}) Correct Answer: a) (mathrm{CH_3CH=CHCH_3}) Concept: But-2-ene is an alkene containing four carbon atoms, with the double bond located between…
Download PDF Class 10 Chemistry — Chapter 07: Nitrogen, Sulphur and Metals Board: Federal Board 1. Multiple Choice Questions (MCQs) i. What is a key component of photochemical smog formed by the reaction of NO and NO₂ with unburned hydrocarbons? a. Sulfuric acidb. Peroxyacetyl nitrate (PAN)c. Carbon monoxided. Ozone Correct Answer: b. Peroxyacetyl nitrate…
Download PDF Class 10 Chemistry — Chapter 06: Salts Board: Federal Board 1. Multiple Choice Questions (MCQs) i. Which of the following salts is soluble in water? a. Silver chloride (AgCl)b. Lead carbonate (PbCO₃)c. Sodium nitrate (NaNO₃)d. Lead chloride (PbCl₂) Correct Answer: c. Sodium nitrate (NaNO₃) Concept: All sodium, potassium, and ammonium salts, as…
Download PDF Class 10 Chemistry — Chapter 05: Reaction Kinetics Federal Board 1. Multiple Choice Questions (MCQs) I. The rate of a reaction ______ as the reaction proceeds. (a) Increases(b) Decreases(c) Remains the same(d) May increase or decrease Answer: (b) Decreases. Concept: As a reaction proceeds, reactants are consumed, so their concentration decreases. This…
Download PDF Class 10 Chemistry — Chapter 04: Electrochemistry Federal Board 1. Multiple Choice Questions (MCQs) i. Which of the following statements is not correct about the galvanic cell? (a) Cations are reduced at the cathode(b) Anions are oxidized at the anode(c) Electrons flow from cathode to anode(d) Oxidation occurs at the anode Answer:…
Download PDF Class 10 Chemistry — Chapter 03: Stoichiometry Federal Board 1. Multiple Choice Questions (MCQs) i. What mass of CO₂ is produced by the combustion of each mole of CH₄? [ CH_4(g)+2O_2(g)rightarrow CO_2(g)+2H_2O(l) ] (a) 16 g(b) 44 g(c) 32 g(d) None Solution: One mole of CH₄ produces one mole of CO₂. Molar…
Download PDF Class 10 Chemistry — Chapter 02: Matter Federal Board 1. Multiple Choice Questions (MCQs) i. What happens to the internal energy of a substance during melting? a) It decreasesb) It stays the samec) It increases Correct Answer: (c) It increases Concept: Heat energy absorbed during melting increases the potential energy component of…
