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Punjab (PTB) · Full book test (board pattern) · Free

10th Class Chemistry Full Book Paper

60 marks · About 2 hours (objective and subjective) · 39 questions. Covers: 13 chapters (CHAP 14: STATES OF MATTER AND PHASE CHANGES to CHAP 26: POLYMERS).

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10th Class Chemistry Full Book Paper

10th Class · Chemistry · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 60Time: About 2 hours (objective and subjective)

Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)

  1. Gasoline has range of carbon atoms:

    1. 1–4

    2. 5–6

    3. 6–10

    4. 10–14

  2. According to the solubility rules, which of these groups of salt are always soluble in water?

    1. All sodium, potassium, and ammonium salts

    2. Barium and lead sulfates

    3. Silver and lead chlorides

    4. All

  3. Hydrocarbons containing at least one double or triple bond are called:

    1. Saturated hydrocarbons

    2. Unsaturated hydrocarbons

    3. Alkanes

    4. Monosaccharides

  4. What is the first step in identifying a limiting reactant?

    1. Balance the chemical equation

    2. Calculate the number of moles of the reactants

    3. Measure the room temperature

    4. Discard the excess reactant

  5. Once bound with the reactant molecule, the particular chemical bonds in the reactant molecule are:

    1. Strengthened

    2. Broken completely into ions

    3. Sufficiently weakened

    4. Replaced by metallic bonds

  6. To obtain sulphuric acid of desired concentration, oleum is mixed with an appropriate amount of:

    1. Water

    2. Oxygen

    3. Hydrochloric acid

    4. Alcohol

  7. Which of the following is NOT one of the first four aliphatic alcohols used as fuel?

    1. Methanol

    2. Ethanol

    3. Propanol

    4. Pentanol

  8. Which monomer is polymerized to produce polypropylene?

    1. Propylene

    2. Ethylene

    3. Styrene

    4. Vinyl Chloride

  9. Which two elements are specifically known to increase the risk of certain cancers?

    1. Lead and Mercury

    2. Arsenic and Cadmium

    3. Chromium and Copper

    4. Nitrogen and Phosphorus

  10. Which catalyst is commonly used in the porous carbon electrodes of a fuel cell?

    1. Copper

    2. Zinc

    3. Platinum

    4. Iron

  11. What happens to the movement of particles when a gas is cooled?

    1. They repel each other more

    2. They disappear

    3. They move faster

    4. Their kinetic energy decreases

  12. What is the byproduct formed along with an ester in esterification?

    1. H2

    2. CO2

    3. H2O

    4. O2

Q2. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. If 10 g of salt is dissolved in 0.5dm3 of water, what will be its concentration in g/dm3?

  2. Why is fluorine always assigned a -1 oxidation number in binary compounds?

  3. What is the impact of heat on the internal energy of a system?

  4. How does the frequency of collisions change with an increase in reactant particles per unit volume?

  5. Which reactants are used to prepare soluble potassium nitrate?

  6. Does the size of gas molecules affect the molar volume? Why or why not?

  7. Define oxidation in terms of oxygen addition and give one example.

  8. Differentiate between evaporation and boiling.

Q3. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. What information does the "Root" provide in IUPAC nomenclature? Give an example.

  2. By what percentage can ethanol reduce greenhouse gas emissions compared to petrol?

  3. How does potassium fertilizer make plants physically strong?

  4. Why is acetylene gas used for welding and cutting purposes?

  5. Define the reactivity series of metals.

  6. What is the difference between saturated and unsaturated hydrocarbons?

  7. How does the purity of ethanol differ between the hydration of ethene and fermentation processes?

  8. Which minerals are typically found in tap water?

Q4. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. What is HCG and when is it produced in the body?

  2. How does acetic acid react with Mg and MgCO3?

  3. How can chemists change the specific properties of a polymer?

  4. Which commercial products are obtained from oils and fats?

  5. What is the chemical name and formula of the salt obtained by reacting ethanoic acid with marble chips?

  6. What is the role of catalyst in addition polymerization?

  7. How do vitamins differ from carbohydrates, lipids, and proteins regarding energy provision?

  8. What are carboxylic acids?

Q5. Long questions (Attempt any 2 of 3 · 2 × 9 = 18)

  1. What are flavouring agents? Which carboxylic acids are used as flavouring agents?

  2. Explain the concepts of oxidation and reduction in detail on the basis of addition and removal of oxygen and hydrogen. Support your answer with at least four balanced chemical equations.

  3. Explain the combustion of alcohols.