Chemistry Paper 1 Questions - Bondo Mocks 2021 Exams

Share via Whatsapp

QUESTIONS 

  1. State the observations made when a piece of sodium metal is dropped into a beaker containing water. (2 marks)
  2. During a class experiment, students passed gas X over heated copper metal, the metal changed its colour to black.
    1. Identify gas X. (1 mark) ………………………………………………………………………………………………
    2. Name the black substance formed. (1 mark) ………………………………………………………………………………………………
    3. Write the chemical equation for the reaction (1 mark)
  3. Name the process which takes place when; (3 marks)
    1. Solid carbon (IV) Oxide changes to gas ………………………………………………………………………………………………
    2. Red litmus paper turns white when dropped in chlorine water
    3. Propene gas molecules converted into giant molecules
  4. A student added 50cm3 of 1.0M aqueous Sulphuric (VI) acid to 50cm3 of 2.0M Potassium Hydroxide and the temperature of the resulting solution rose by 4ºC.
    1. Define the term Molar heat of neutralization. (1 mark) ……………………………………
    2. Calculate the molar heat of neutralization (2 marks)
      (C = 4.2 kJkg-1 K-1, Density of solution = 1g/cm3)
  5. Use the table below to answer the question that follow:
    Element Atomic number
    A 11
    B 13
    C 14
    D 17
    E 19
    1. Write an equation for the reaction between element A and water. (1 mark)
    2. Explain the trend of atomic radii between elements A and D. (2 marks)
  6.          
    1. Define the term allotropy (1 mark)
    2. In terms of structure and bonding, explain why graphite is used as a lubricant. (2 marks)
  7.      
    1. State the Boyles Law. (1 mark)
    2. A given mass of the gas occupies 20cm3 at 25ºC and 670mmHg pressure. Find the volume it will occupy at 10ºC and 335mmHg. (2 marks)
  8. Study the flow chart below and answer the questions that follow.
    1
    1. Name
      1. Cations present in mixture M. (1 mark)
      2. Anion present in the colourless solution. (1 mark)
    2. Write an equation to show how the white precipitate in step 3 dissolves. (1 mark)
  9. The solubility of potassium nitrate is 85g/100g of water at 50ºC and 32g/100g of water at 25ºC.
    1. Define the term solubility. (1 mark)
    2. Calculate the mass of the crystals formed if a saturated solution of potassium nitrate in 50g of water at 50ºC is cooled to 25ºC. (2 marks)
  10. Magnesium Chloride dissolves in water to form a neutral solution while iron (III) chloride forms an acidic solution. Explain. (3 marks)
  11. The diagram below is a set up to prepare a certain gas X. Study it and use it to answer the questions that follow.
    2
  12.        
    1. Identify gas X. (1 mark)
    2. Why is the gas collected over water? (1 mark)
    3. Why are Copper (II) Sulphate crystals added to the flask where the reaction takes place? (1 mark)
  13.      
    1. Give the systematic names of the following organic compounds. (2 marks)
      1. CH3CH2CH22CH2OH 
      2. CH3CH2COOCH2CH33 
    2. Explain why an organic compound with the formula C4H8 burns with a more soot flame than C4H10. (1 marks)
  14. When solid Zinc Carbonate was added to a solution of Hydrogen Chloride in methylbenzene there was no observable change. On addition of some water to the mixture there was effervescence. Explain the observation. (2 marks)
  15. In titration experiment, 25.0 cm3 of sodium hydroxide containing 8.0 g per litre was required for complete neutralization of 0.245 g of a dibasic acid. Calculate the relative molecular mass of the acid. (3 marks)
  16. Describe how you would obtain solid sample of each of the following components of solid mixture containing lead (II) chloride, Ammonium Chloride and Copper (II) oxide (3 marks)
  17.        
    1. Define ionization energy.(1 marks)
    2. Explain why the second ionization energy of Magnesium is higher than the first ionization energy. (2 marks)
  18. The diagram below represents a paper chromatography for three brands of juice suspected to contain unwanted food additives.
    3
    From the results, it was found that unwanted additives are present in Y and Z only. On the chromatogram:
    1. Circle the spots which show unwanted food additives. (1 mark)
    2. Name the solvent commonly used in paper chromatography. (1 mark)
    3. State one application of chromatography. (1 mark)
  19.           
    1. Show bonding in Aluminum (III) Oxide. (1 mark)
    2. Identify the type of bonds represented by p and q in the substances below.
      4
      p.................................................................................................................(1 mark)
      p ………………………………………………………………………...…….... (1 mark)
      q ………………………………………………………………………………….(1 mark) 
  20. The following diagram represents a charcoal burner. Study it and answer the questions that follow:
    5
    Write the equations for the reactions at regions A, B and C. (3 marks)
    A -…………….……………………………………………………………………………………
    B –…………………………………………………………………………………………………
    C -……………………………………….…………………………………………………………
  21. Use the scheme below to answer the question that follow.
    6
    1. Identify process N. (1 mark)
    2. Identify the solids (2 marks)
      H- ………………………………………………………………………………………………
      J- ………………………………………………………………………………………………
  22. Ammonia gas is prepared by Haber process according to the equation below:
    N2(g)+3H2(g) → 2NH3(g) +Heat
    State and explain the effect on equilibrium when the following conditions are applied.
    1. Pressure increased. (1 mark)
    2. Temperature increased. (1 mark)
    3. State Le Chatelier’s principle. (1 mark)
  23. You are given the following half equations.
    I2(s) +2e- 2I (aq) EѲ=+0.54V
    Br2(l) +2e- ⇌ 2Br - (aq) EѲ=+1.09V
    1. Write an overall equation for the cell reaction. (1 mark)
    2. Calculate the EѲ value of the cell. (1 mark)
    3. Name the oxidizing agent. (1 mark)
  24. When a current of 0.8Ampheres was passed for 44 minutes and 20 seconds through fused iodide of metal Z, 0.7167g of Z was deposited. Determine the charge of the ion of metal Z. (3 marks)
    (1 Faraday=9650ºC, RAM of Z=65)
  25. The set up below shows how small pieces of copper are heated in nitrogen (I) Oxide.
    7
    1. Write an equation for the reaction which occurs in the glass jar. (1 mark)
    2. Give two uses of the Nitrogen (I) Oxide. (1 mark
  26. State what would be observed if concentrated Sulphuric (VI) Acid is added to:
    1. Sugar crystals. (1 mark)
    2. Hydrated Copper (II) Sulphate crystals. (1 mark)
    3. What type of reaction has taken place above? (1 mark)
  27.        
    1. Complete the table below. (2 marks)
      Solution pH Nature of Solution
      H 1.0  
      I   Neutral
      J   Weak Acid
        13.0  
    2. A farmer intended to plant cabbages in his farm. he first tested the PH of the soil and found it to be 3.0.If cabbages do well in alkaline soils, explain the advice that would be given to the farmer in order to realize a high yield. (1 mark)
  28. Name an appropriate apparatus:
    1. That is used to prepare standard solutions in the laboratory. (1 mark)
    2. That is used in heating solid substances strongly. (1 mark)
    3. That can be used to separate two immiscible liquids. (1 mark)
Join our whatsapp group for latest updates

Download Chemistry Paper 1 Questions - Bondo Mocks 2021 Exams.


Tap Here to Download for 50/-




Why download?

  • ✔ To read offline at any time.
  • ✔ To Print at your convenience
  • ✔ Share Easily with Friends / Students


Get on WhatsApp Download as PDF
.
Subscribe now

access all the content at an affordable rate
or
Buy any individual paper or notes as a pdf via MPESA
and get it sent to you via WhatsApp

 

What does our community say about us?

Join our community on:

  • easyelimu app
  • Telegram
  • facebook page
  • twitter page
  • Pinterest