CHEMISTRY EXAM QUESTIONS FOR SS1 THIRD TERM

THIRD TERM SS1 CHEMISTRY EXAM QUESTIONS – EDUDELIGHT.COM

THIRD TERM EXAMINATION      

CLASS:    S S 1

SUBJECT: CHEMISTRY

  1. Which of the following is not a separation technique?
  2. Fractional distillation               (b) Propiation         (c)Precipitation     
  3. (d) Chromatography
  • Substances that cannot be split into two or more simpler units through ordinary chemical process is known as
  • Element   (b) compound       (c) Mixture    (d)Solvent
  • Easy reversibility is a characteristic of chemical change
  • True          (b) False        (c) All of the above           (d) None of the above
  • Sodium is ………………………… number of the periodic table?
  • 10              (b) 15             (c) 11             (d) 17
  • A substances that is the smallest particle of an element which can take place in a chemical reaction is called

(a)Atom        (b) Mole        (c) Ion           (d) Atomic number

  • An element X has 127 neutrons and 82 Protons its atomic number is?
  • 209           (b) 105           (c) 45             (d) 82             (e) 127
  • When a bottle of coca – cola is opened, bubble of gas evolves. The gas is

(a) Hydrogen          (b) CO2            (c)CO            (d) Sulphur

  • The formula for Empirical formula is

(a) More ratio = % by mass

                                     Relative atomic mass

  • Mass = mole

                              Atomic number

© Atomic number = % purity

                                             Molecular mass

  • Mole

Molarmass

  • The atomic number of element  is determines by
  • The number of protons in the element
  • The number of neutrons in the element
  • The number of electrons in the element
  •  The number of atoms in the element
  1.  The atomic number of caesium is 55 and its atomic mass is 133. The nucleus of caesium atom contains?
  2. 78 protons and 55 electrons (b) 55 protons and 78 neutrons

©   55 protons and 78 electrons (d) 78 protons and 55 neutrons.

  1.  The combining power of an element is called? (a) Valency
  2.  Electron (c) mixture    (d) Atom
  1. An atom X consists of 6 protons, 6 electrons and 7 neutrons. Which of the following representation of the atom is correct?
  2. 136 x           (b) 137X          (c) 196X           (d)197 X
  1.  Fluorine has ………… number of protons?
  2.  12             (b) 9   (c) 14 (d) 13
  1.  Which is not a career in chemistry?

(a)Engineering       (b) Electrophysics  (c) Chemist  (d) Technologist

Use the information to answer the following question

X  If an element X has an Atomic number of 15 and a molecular number 25

  1. It would be represented by
  2. 2515 X         (b) 1015 X        (c) 2510 X        (d)3515 X
  1. It has ……………… number of neutrons?
  2. 10              (b)15              (c) 25             (d) 20
  1. It has  ………………………. Number of protons
  2. 10              (b) 15             (c) 25             (d) 20
  1. If the electronic configuration is 2, 8, 8, 7, what is the valency of this element
  2. -2               (b) +3             (c) -1              (d)-4
  3. The IUPAC name for Na2804 is?
  4. Sodium (iv) sulphate
  5. Sodium tetraoxosulphate(vi)
  6. Sodium tetraoxide
  7. Sodium (vi) sulphate
  8. Precipitation is a separation technique that allows the use of a Burnsen Burner?

(a)True                (b) False                    (c) None of above

  • An element has an Atomic number 25, what is its correct electronic configuration?

(a) 2, 8, 8, 6, 1

(b) 2, 8, 8, 7

© 2, 7, 7, 7

     (d)2, 8, 7, 1

  • If an element is represented, 35.5 X what is the name of this element
  •  Carbon                    (b) Fluorine              (c) chlorine  (d) iodine
  • What is the molecular mass of the element?

(a) 17             (b) 37.5          (c) 35.5                      (d)8

  • Salt in water can be separated by which separation Technique?
  • Fractional Distillation         (b) Evaporation                 (c)Precipitation

(d) chromatography

  • The smallest part of a compound that can take  part in a chemical reaction is ?
  • Mixture                      (b) molecule                       (c) Electron  (d) Atom
  • Avagadro’s constant is?
  • 6.01 x 1023
  •  6. 023 x 1023
  •  6. 02 X1022
  • 6. 02 X1223

27. .   Acid turns blue litmus paper ________________?

a. yellow     b. colourlessc  green     d.  red

28.  Acids are characterized by     a. Bitter taste      b. soapy taste

c. ssour taste        d.  all listed

29.  An element existing in two or more physical states and maintaining the same    chemical characteristics is called ______________a. Isamers     b. allotropes

c. isolapes      d.  cirapdile

30.  Diamond crystals are of ________shape  a.Tetrahyphral    b pertshadral

c.  odshedral      d.  triangular

31.  Which all drape of carbon is used as abbrass vet

a.  graphite    b. coke     c. coal      d. diamond

32.  Which  allotrope of carbon  is used in lead pencil?

a. graphite    b. coke      c. coal        d.  diamond

33.  Carbon dioxide is a gas that burns with _____________flame

a. yellow    b. green    c. blue     d. colourless

34.  Which of these statements is correct about triococarbondo (N)?

a. Tribasic acid       b. dibasic base     c. monobasic acid   d. .dibasic acid

35. Hydrocarbons are of two classes namely:   a. graphite and diamond

b. coke and coal    c. aliphatic and gas   d.  aromatic and aliphatic

36. An example of aromatic hydrocarbons is    a. Ethane     b. methane

c.  cydopropane       d. benzene

37. Which is not a raw material for chemical industry   a. polroleum

b.  coal    c. alum     d.  salt

38. Which is not a use of sodium trioxocarbonate (N)a. heavy chemical?  

b. soft chemical   c. fertilizer    d. plastic

39. Which is not a use of sodium trioxocarbonate (W)    a. for softening

b.  for manufacturing glass    c..for washing or bleaching of textiles

d.  to manufacture salt

40. Which is not a use of hydrogen trioxocarbonate    a. As baking powder

b. As health salts    b. As fire extinguishers   d.  To manufacture hydroxide

41.  Which is not a property of carbon(II)oxide    a. It is colourless

b.  It is slightly lighter than air    c. It is insoluble in water    d.  It is soluble

42.  Which is not a property of carbon dioxide  a. slightly soluble in water

b. denser than air    c. wean acidic gas    d.  used for food

43. Which is a type of amorphous   a. carbona.black charcoal   b. plant charcoal

c.  red charcoal       d.  granded charcoal

44. Which is not a type of coal?  A. peat   b.lignitebituminous  c. coal

45. Coke is a non-volatile reside, this statement is   a.  true     b. false  c. negative

46.  Water gas is a mixture that contains Co and ……….gas?    a. hydrogen

b. helium     c. lithium      d. berlium

CHEMISTRY EXAM QUESTIONS FOR SS1 THIRD TERM

THEORY

1a.   Write the full meaning of IUPAC

  1. Write the chemical formula for the following elements
  2. Sodium and oxygen    (ii) hydrogen and oxygen   (iii) cans oxygen
  3. Write the names of these chemical compounds
  4. CuSo4   (ii) FeSO4    (iii) H2So4     (iv) KCLO4

2. a. What is an oxide of carbon?                                                         

b. State focus physical properties of CO2

c. Write the formula for water gas

d.  Write three properties of carbon

3a.  List three uses of Na2So4

  1. In 50 words write about the chemical industry including the raw materials used
  2. List three divisions of chemical industry

4a.  State 3 allotropes of carbon

  1.  State 4 properties of diamond
  2. State 3 properties of granites

4   Define valency, Relative atomic mass

(b) List six types of separation techniques, explain two.

© List three differences between physical and chemical changes.

  • Define Boyle’s law.

(b)A gas has a volume 385cm3 and a pressure of 780mmHg. Find its new volume if the pressure is reduced

CHEMISTRY EXAM QUESTIONS FOR SS1 THIRD TERM

       

Examination malpractices may lead to a repeat of the subject or suspensions don’t be involved.   

SUBJECT   CHEMISTRY     

 CLASS: S. S. S 1            

DURATION 2 HR

OBJECTIVE

1Which of the following substances is covalent compound? Sodium chloride   (b) magnesium sulphide (c) hydrogen chloride (d) potassium nitrate.

  2. The components of universal indicator solution can best be separated by: (a) chromatography (b) titration (c) evaporation (d) fractional distillation

3.The mass of an element is 27 and its atomic number is 13.       what is the composition of the nucleus of its atom?

13 neutrons and14 protons

13 neutrons and 14 protons

13 protons and 14 neutrons

13 electrons and 14 neutrons

How many  unpaired electrons are in the p- orbital of a fluorine atom?(a) 1 (b)2   (c) 3  (d) 0

Two elements X and Y combine to form a formula X2Y3. which of the following representations would fit the configurations of X and Y?

          X                              Y

          2,2                           2,3

          2,6                          2,5

          2,8,2                      2,8,3

          2,8,3                        2,6

Element  X with electronic configuration 2,8,2 and element Y with electronic configuration 2,8,7 are likely to combine by:

Metallic bonding    b) covalent bonding  c) electrovalent bonding    d)  dative bonding.

Carbon is often deposited in the exhaust pipe of cars because of the  (a) presence of carbon in petrol (b) dehydrogenation of petrol  (c) incomplete combustion of petrol  (d) presence of additives in petrol

The following are heavy chemicals except 

Tetraoxosulphate (VI) acid   (b) caustic soda (c) sodium    trioxocarbonate(VI)  (d) Ethane

Octane numbers is highest in petrol containing  a high proportion of ———-  (a) heptane    (b) octane  (c) 2-methyl pentane  (d) 2,2,4 trimethylpentane

When the kerosene fraction from petrol is heated at high temperature, a lower boiling 

liquid is obtained. This process is known as  (a) polymerization  (b) refining  (c) hydrogenation (d) fractional distillation

Which of the following statements best explain cracking? It is a process  (a) in which alkene adds on itself repeatedly to form long chain polymer   (b) in which large hydrocarbon  molecules are broken into smaller units   (c) in which carbon results in a zig-zag arrangement  (d) in which aromatic hydrocarbons are produced.

What are the values of x, y and z respectively in the following  equation?                                                                                                  

MnO2(s) + xHCl(aq)   MnCl2(aq)+ YH2(l) + zCl2(g)   (a) 4,1,2 (b)1,2,1  (c) 2,1,2   (d)4,2,1

     13.Boyle’s law can be expressed mathematically as:   (a) V&1/p   b.v1/T1=V2/T2   c.V&T(P constant)   d.P&V(T constant)   e.P&T   

14.Which of the following statements explain why tetraoxosulphate(VI) acid is regarded as a strong acid.

a.it is dibasic  b.it is concentrated c .the acid is completely ionized in aqueous solution   d.the acid is corrosive

15.The number of replaceable hydrogen atom in one molecule of an acid indicates its  a.Basicity   b.Alkalinity   c.Acidity   d.Reactivity

16.which of the following is /are characteristics properties of acids?They  i.form  hydroxonium ions in water  ii.liberate carbon (iv)oxide from trioxocarbonate(iv) salts.  Iii Turn blue litmus paper red.  Iv.have a soapy feel

a.iv only   b.i and ii  c.iii and iv  d.  I ,ii,and iii

17.The following acid are monobasic except a.Trioxonitrate(v)acid   b.Hydrochloric acid  c.Ethanoic acid  d.Tetraoxosulphate (v)acid

18.An acid is a substance which in the presence of water produces

A.salts   b.Oxygen  c.Effervescence  d.Hydroxonium ions

19.Which of the following is an acid salt?

a.(NH4)2CO3  b.CH3COONa  c.KHSOd.MgSO4

20.The general methods of preparing salts include

 I .neutralization   ii.precipitation  iii.double decomposition

Iv action of an acid on a metal

A.iv only  b.i and ii  c.iii and iv  d.i ,ii,iii,and iv

21.Alums are classified as

a.basic salts  b.acid salts  c.anhydrous salts  d.double salts

22.The following salts will produce gas on reacting with hydrochloric acid exceot a.CuSO4  b.CaCO3   c.FeS   D.K2CO3

23.Which of the following methods is good for the preparation of an insoluble salts?

A.action of an acid on a metal   b.double decomposition  c.neutralisation  d.action of an acid on an oxide

24.Which of the following conclusion about solution of pH4 is correct

a.it contains more OH than H3O+

b.its POH value will be 10

c.it is more acidic than a solution of pH2

d.its hydrogen ion concentration is 4.0 x10 -2

25. Acheson process is a process of producing

a. graphite from coke at high temperature  b. producing coke using graphite at high temperature  c. anthracite from carbon   d. wood-charcoal from coal.

26. One of these is not a reaction of charcoal

a.C +O2͢  CO2   b.CO2+C͢  2CO   c.2CO+O2͢   2CO2    d.CO2+2CO͢  2CO

27. Kipp’s apparatus is an instrument  for preparing intermittent supply of gases by reacting    a. liquid with gas   b. liquid with solid   c. solid with gas d.liquid with liquid

28. Gas which dissolves in ammoniacal copper I chloride but insoluble in water is   a. NH3   b.CO   c.N2O   d.CO2

29. Fine chemicals  have the following characteristics except

a. they are chemically pure   b. they are produced by batch process   c. they are produced in large quantity because of high applicability.

d. they are produced in small quantity because of limited applicability.

30. Exceptional large number of carbon compounds is essentially due to the ability of   a. carbon to  catenate liberally   b. various groups to catenate  

c.   Nitrogen, Hydrogen, phosphorus and the Halogens to catenate with themselves

d. Hydrocarbons to dominate other groups.

31.Universal indicator is added to a colourless solution and turns dark blue. What does this tell you?

a.It is an acid   b. It is neutral    c.It is an alkali

32.Which ion is present in all acid solutions?

a. Hydrogen ion, H+   b. Hydroxide ion, OH   c. Hydride ion, H

33.What name is given to a base that dissolves in water?

a.  Amphoteric    b . An alkali     c. A salt

34. Which ionic equation takes place in an acid-alkali neutralisation reaction?

a. H+ + OH → H2O   b. HCl → H+ + Cl     c.NH3 + H2O → NH4+ + OH

35. Which of the following could be used to neutralise acidic soil?

Sodium chloride   b. Calcium oxide      c. Sulfuric acid

36. Sulfuric acid + magnesium oxide →…

a. Magnesium sulfate + carbon dioxide + water   b. Magnesium sulfate + hydrogen    c. Magnesium sulfate + water

37. Which of these options would produce potassium nitrate?

Sodium hydroxide and sulfuric acid     b. Potassium carbonate and hydrochloric acid    c. Potassium hydroxide + nitric acid

38. Which acid is used to make salts that have names ending in sulfate?

Sulfamic acid       b. Nitric acid    c. Sulfuric acid

39. What ion is present in nitric acid?

NO3     b. NH4+   c. OH

40. Zinc oxide + nitric acid →…

Zinc nitrate + water   b. Zinc chloride + hydrogen   c. Zinc nitrate + water + carbon dioxide

41. Which two chemicals could you react to make ammonium chloride?

a. Ammonium hydroxide and hydrochloric acid     b. Ammonia and sulfuric acid     

  c. Potassium hydroxide and nitric acid

42.Calcium carbonate + hydrochloric acid →…

a.Calcium chloride + hydrogen    b.Calcium chloride + water + carbon dioxide

c. Calcium sulfate + water

43.Which of these salts is most likely to be soluble? a. Potassium nitrate  b. Iron carbonate c. Copper oxide

44.What is the name of the precipitate made from the reaction between silver nitrate and sodium chloride?

Sodium nitrate      b. Silver chloride   c. Water

45.When producing a soluble salt in a reaction between an acid and an alkali, how can you prepare dry solid crystals from the solution?

a.Filtration      b.Chromatography     c. Evaporation

46.When performing an acid-alkali titration, what piece of apparatus is used to place a fixed volume of the first solution into the conical flask?

Burette       b. Pipette      c. Beaker

47.When processing titration results, what do you do with results that are very close together? 

a.Take an average   b . Ignore them    c. Pick one

48.The following  can be obtained directly from the destructive distillation  of coal except

a.ammoniacal liquor  b.coke   c.producer gas  d.coal tar

49.The use of diamond in abrasives is due to it’s  a. high melting point   b. durability  c. lustre   d. hardness  e. octahedral shape

50.The liquid product of the destructive distillation of coal is a. kerosene  b. ethanol  

c. ammoniacal liquor  d. paraffin oil

THIRD TERM SS1 CHEMISTRY EXAM QUESTIONS – EDUDELIGHT.COM

THEORY

ATTEMPT ANY THREE

1a.How would you prove that a given colourless  liquid is  an acid?

b.  Sulphur(iv) oxide is described as an acid anhydride. Elaborate on this statement.

c.Give the natural sources of the following organic Acids.

i. Lactic acid   ii Ascorbic  acid   iii  Amino acids

2a. Give four general methods of preparing salts and use chemical equations for the examples.

2b. How would you prove that sodium Hydroxide is a base without using litmus paper and indicator to test? Equation of reaction required.

2c. The concentration of H+ in a solution is 1×10-3 mol/dm3,what is the PH  of the solution.

3a.Explain why Graphite is a good conductor of electricity while Diamond is not.

3b.Why is carbon(ii)oxide poisonous?

3c.Which properties of carbon(iv)oxide account for its use in fire extinguishers?

4a.Name four products obtained in the destructive distillation of coal.

4b.Write a short note on the preparation and uses of producer Gas.

4c.What happens when dilute acids reacts with trioxocarbonates. Use chemical equations to support your answer.

5a.State the products of fractional distillation of crude oil in increasing order of boiling points.

5b.Differentiate between heavy chemicals and fine chemicals and state two examples each.

5c.What are Hydrocarbons. Give  2 examples.

THIRD TERM SS1 CHEMISTRY EXAM QUESTIONS – EDUDELIGHT.COM

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