1.Read the sentence and fill in the gaps with the following expressions in appropriate forms. A titration is a method of analysis that will allow you to determine the precise ____________ of a reaction and therefore the precise quantity of reactant in the titration flask.

a. endpointb. indicator c. titrant

2.Combine the word in bracket with suitable suffix to complete the sentence ________________ (compress) is the reduction in size of data in order to save space ortransmission time.

a. –ionb. -or c. -ing

3.Combine the word in bracket with suitable suffix to complete the sentenceIn chemistry, the ____________________(dense) of many substances is compared tothe______________ (dense) of water.

a. -ityb. –ionc. -ness

4.Combine the word in bracket with suitable suffix to complete the sentence _______________________(transmit) is the act of passing something on.

a. –ionb. -ness c. -ity

5.Combine the word in bracket with suitable suffix to complete the sentence_________________ (hard) is the characteristic of a solid material expressing its resistance topermanent deformation.

a. -ness b. -or c. -ing

6.Combine the word in bracket with suitable suffix to complete the sentenceCombustion process is also called __________________ (heat).

a. -ingb. –ionc. -er

7.Combine the word in bracket with suitable suffix to complete the sentenceIt can be ________________ (use) to write a summary of your argument first.

a. -lessb. -fulc. -al

8.Combine the word in bracket with suitable suffix to complete the sentence

Metals containing iron are called _______________ (ferrum).a. -ousb. -alc. -ful

9.Combine the word in bracket with suitable suffix to complete the sentenceYou can ask him if you want to but it’s ________________ (use). He doesn’t want to talk about it.

a. -fulb. -lessc. -ous

10.Combine the word in bracket with suitable suffix to complete the sentenceHydrogen and oxygen are ___________________ (chemistry) elements.

a. -alb. -less c. -ous

11.Combine the word in bracket with suitable suffix to complete the sentenceIf any material is _______________ (conduct), it means it conducts electric current.

a. -iveb. -alc. -less

12.Combine the word in bracket with suitable suffix to complete the sentenceI think this plan is too complicated. You should __________ (simple) it.

a. -ifyb. -isec. -ize

13.Combine the word in bracket with suitable suffix to complete the sentenceThere used to be some disputes between the 2 countries but recently they have managed to_______________ (normal) their relations.

a. -izeb. -ifyc. -ise

14.Combine the word in bracket with suitable suffix to complete the sentenceI hope you ________________ (real) that you are wrong.

a. -izeb. -ifyc. -ise

15.Combine the word in bracket with suitable suffix to complete the sentenceWhen a liquid substance becomes solid, it ______________ (solid).

a. -ifyb. -isec. -ize

16.Choose the correct alternative to complete this statement.

If you can see very clearly through a material, the material isa. transparentb. translucentc. translucid

17.Choose the correct alternative to complete this statement.If you cannot see through a material, it is

a. opaqueb. opalescent c. opal

18.Choose the correct alternative to complete this statement.A substance that dissolves in liquid is

a. soluble b. dissolute c. dissolvable

19.Choose the correct alternative to complete this statement.A liquid that dissolves substances is a

a. solventb. soluentc. solutent

20.Choose the correct alternative to complete this statement.A material that is hard but breaks easily is

a. brittleb. battlec. bristle

21.Choose the correct alternative to complete this statement.If a material bends easily, it is

a. flexible b. bendiblec. flectable

22.Choose the correct alternative to complete this statement.A material that does not bend easily is

a. Rigidb. Rancidc. rigorous

23.Choose the correct alternative to complete this statement.A metal that can easily be beaten into new shapes is

a. malleable b. beatable c. mullible

24.Choose the correct alternative to complete this statement.A material that conducts electricity is

a. conductive

b. conducive c. conductor

25.Choose the correct alternative to complete this statement.A material that catches fire easily is

a. Flammableb. Flameablec. inflammable

26.Read the sentence and fill in the gaps with the following expressions in appropriate forms. An atom is a collection of matter consisting of a positively charged core ( the atomic nucleus) which contains ____________ and ____________ and which maintains a number of electrons to balance the positive charge in the nucleus.

a. proton, neutronb. element, electronc. chemical reaction

27.Read the sentence and fill in the gaps with the following expressions in appropriate forms. The atom is also the smallest portion into which an ____________ can be divided and still retain its properties, made up of a dense, positively charged nucleus surrounded by a system of ____________.

a. elementb. cationc. proton

28.Read the sentence and fill in the gaps with the following expressions in appropriate forms. An element is a class of atoms which have the same number of protons in the nucleus. This number is known as the ___________ ____________ of the element.

a. atomic numberb. atomic nucleusc. chemical compound

29.Read the sentence and fill in the gaps with the following expressions in appropriate forms. An ____________ is an atom or a molecule that has lost or gained one or more electrons.

a. ionb. cationc. anion

30.Read the sentence and fill in the gaps with the following expressions in appropriate forms. Positively charged ____________ (e.g. sodium cation Na+) and negatively charged ___________ (e.g. chloride Cl−) can form neutral salts (e.g. sodium chloride NaCl).

a. cation, anion

b. proton, neutronc. element, electron

31.Read the sentence and fill in the gaps with the following expressions in appropriate forms. Electrical forces at the atomic level create _____________ __________ that join two or more atoms together, forming molecule.

a. chemical bondsb. chemical reactionc. chemical compound

32.Read the sentence and fill in the gaps with the following expressions in appropriate forms. When atoms of two or more different elements bond together, they form a ___________ _________.

a. chemical compoundb. chemical bondsc. chemical reaction

33.Read the sentence and fill in the gaps with the following expressions in appropriate forms. The __________ _________ for a water molecule is H2O.

a. chemical formulab. chemical equationc. chemical compound

34.Read the sentence and fill in the gaps with the following expressions in appropriate forms. Compounds are formed or broken down by means of ____________ __________.

a. chemical reaction b. chemical compoundc. chemical bonds

35.Read the sentence and fill in the gaps with the following expressions in appropriate forms. Chemists use ___________ ___________ to express what occurs in chemical reactions.

a. chemical equation b. chemical formulac. chemical compound

36.Put the following expressions into correct places in the sentence.The most convenient presentation of the chemical elements is in the periodic table of the chemical elements, which groups elements by ___________ ___________.

a. atomic numberb. atomic weightc. alkali metals

37.Put the following expressions into correct places in the sentence.

Due to its ingenious arrangement, columns, or _____________, and ______________, or periods, of elements in the table either share several chemical properties, or follow a certain trend in characteristics such as atomic radius, electronegativity, electron affinity, etc.

a. group, rowb. lanthanides, actinidesc. halogens, noble gases

38.Put the following expressions into correct places in the sentence.The main value of the periodic table is the ability to predict the chemical properties of an element based on its location on the table. The properties vary differently when moving vertically along the _________ of the table, than when moving horizontally along the ______________.

a. group, rowb. lanthanides, actinidesc. halogens, noble gases

39.Consist, contain or include?The periodic table __________ of rows and columns.

a. consistb. containc. include

40.Consist, contain or include?It ________ elements.

a. containb. consistc. include

41.Consist, contain or include?Different elements ________ carbon, sulphur, hydrogen, oxygen etc.

a. includeb. consistc. contain

42.Read the sentence and fill in the gaps with the following expressions in appropriate forms. There are four main states of matter: _________ , _________ , _________ and _________ .

a. solid, liquid, gas, plasmab. energy, matter, vapor, gasc. liquid, gas, plasma, vapor

43.Read the sentence and fill in the gaps with the following expressions in appropriate forms. Each of these states is also known as a _________ .

a. phaseb. matter

c. liquid44.Read the sentence and fill in the gaps with the following expressions in appropriate forms. Elements and compounds can move from one phase to another phase when special ________ ________ are present.

a. physical forceb. chemical compoundc. chemical equation

45.Read the sentence and fill in the gaps with the following expressions in appropriate forms. One example of those forces is __________ .

a. temperatureb. pressurec. concentration

46.Read the sentence and fill in the gaps with the following expressions in appropriate forms. If ________ is added (like increasing the temperature or increasing pressure) or if energy is taken away (like freezing something or decreasing pressure) you have created a ________ ________.

a. energy, physical changeb. temperature, decreasing pressurec. pressure, increasingthe temperature

47.Read the sentence and fill in the gaps with the following expressions in appropriate forms. One compound or element can move from phase to phase, but still be the same ________ .

a. substanceb. materialc. energy

48.Read the sentence and fill in the gaps with the following expressions in appropriate forms. You can see ________ ________ over a boiling pot of water.

a. water vaporb. decreasing pressurec. physical change

49.Read the sentence and fill in the gaps with the following expressions in appropriate forms. That vapor (or gas) can ________ and become a drop of water.

a. condenseb. evaporatec. sublimate

50.Read the sentence and fill in the gaps with the following expressions in appropriate forms. If you put that drop in the freezer, it would become a ________ .

a. solidb. liquidc. gas

51.Read the sentence and fill in the gaps with the following expressions in appropriate forms. On the other hand, a ________ ________ would change the way the water acted, eventually making it not water, but something completely new.

a. chemical changeb. physical changec. decreasing concentration

52.Choose the correct answerWhat is the term used to describe the phase change as a liquid becomes a solid?

a. freezing b. evaporation c. condensation

53.Choose the correct answerWhat term is used to describe the phase change of a solid to a liquid?

a. melting b. freezing c. boiling

54.Choose the correct answerWhat is the term used to describe the phase change of a liquid to a gas?

a. boiling b. condensation c. melting

55.Match the word to form compound.class

a. roomb. controlc. brush

56.Match the word to form compound.self

a. controlb. fiction c. tax

57.Match the word to form compound.Science

a. fictionb. lights

c. gap58.Match the word to form compound.tooth

a. brush b. housec. gap

59.Match the word to form compound.income

a. taxb. lightsc. gap

60.Match the word to form compound.traffic

a. lightsb. controlc. fiction

61.Match the word to form compound.green

a. houseb. roomc. control

62.Match the word to form compound.Generation

a. Gapb. Fictionc. lights

63.Combine the word in bracket with suitable suffix to complete the sentenceA __________________ (boil) is a closed vessel in which water or other fluid is heated.

a. -erb. -or c. -ing

64. What is the melting point of a substance?a. A physical propertyb. A chemical propertyc. A natural property

65. Chlorine is a part of ________family of elementsa. Halogenb. Metallicc. Alkaline

66. Lemon juice is Basica. Acidic

b. Neutralc. Metallic

67. A pH of below 7 indicatesa. Alkalinityb. Presence of Ionsc. Acidity

68. Acid + _______ = Salt + Watera. Metalb. Non Metalc. Base

69. Acids change a litmus paper froma. Red to Blueb. Green to Whitec. Blue to Red

70. Fizziness in Coco–Cola/Pepsi is caused bya. Carbon Dioxideb. Heliumc. Hydrogen

71. A substance which speeds up a chemical reaction without itself getting affected is known as a

a. Catalystb. Counter Ionc. Nucleus

72. Which of the following gases is green in color?a. Chlorineb. Kryptonc. Neon

73. Heat is liberated ina. Endothermic Reactionsb. Substitution Reactionsc. Exothermic Reactions

74. The lead of a pencil mainly containsa. Leadb. Graphitec. Carbon Black

75. What gas is evolved when dilute sulphuric acid is added to Zinc?a. Sulphur Dioxideb. Argonc. Hydrogen

76. A substance that absorbs moisture is known asa. Hygroscopicb. Hydrophilic

c. Hydrophobic77. Which of the following is not an acid?

a. HClb. H2SO4

c. NaOH78. What is the combination of any substance with oxygen known as?

a. Reductionb. Oxidationc. Combustion

79. Which of the following is not a physical change?a. Oxidationb. Decantationc. Distillation

80. The two allotropes of phosphorus area. Rhombic Phosphorus, Monoclinic Phosphorusb. Red Phosphorus, Yellow Phosphorusc. Alpha Phosphorus, Beta Phosphorus

81. Which of the following is a chemical change?a. Boiling of waterb. Freezing of waterc. Rusting of iron

82. If no more solute can be dissolved in a solvent at a given temperature then that solution is called

a. An Unstable Solutionb. A Real Solutionc. A Saturated Solution

83. Which of the following is not an allotrope of carbona. Silkb. Charcoalc. Diamond

84. What is the melting point of a substance?a. a physical propertyb. a chemical propertyc. a natural property85. Chlorine is a part of _________ family of elementsa. halogenb. noblec. metallic86. Give the name the chemical elements and compoundsK

a. Potassiumb. Sodium

c. Iron87. The subscript “2” means that two atoms of the element hydrogen _________together to form a molecule.a. have joinedb. have been joiningc. is joining88. Which of the following symbols in a chemical equation means “produces”?a. b. +c. (aq)89. New substances produced by a chemical reaction are ___________.a. productsb. reactantsc. coefficients90. ___________ is a way to describe a chemical reaction using chemical formulas and symbols.a. a chemical equationb. a physical Lawc. Synthesis91. ___________ reaction release heat energy.a. exothermicb. endothermicc. catalyzed92. ___________reaction absorb heat energy.a. endothermicb. exothermicc. catalyzed93. A(n) _________is a substance that speed up a chemical reaction without being permanently changed itself.a. catalystb. inhibitorc. exotherm94. Read the equation using IUPAC nomenclature:CH4 + 2O2 → CO2 + 2H2Oa. methane plus oxygen yields carbon dioxide and waterb. CH four plus O two yields CO two and H two Oc. CH4react to form H2O and CO2

95.Which of the following symbols in a chemical equation means “forms and is formed from”?a. ↔b. →c. +

96.Which of the following symbols in a chemical equation means “plus”?a. +b. →c. ↔97. List the names of NaCla. sodium chloride, “table salt”b. sodium chloride, “lye”c. sodium hydroxide, “washing soda”98.List the names of NaHCO3

a. sodium hydrogen carbonate, “baking soda”b. sodium hydroxide, “washing soda”c. sodium bicarbonate, “washing soda”99. List the names ofNaOHa. sodium hydroxide, “lye”b. sodium hydroxide, “lime”c. sodium bicarbonate, “caustic soda”100.List the names of KOHa. potassium hydroxide, “potash”b. potassium hydroxide, “lime”c. sodium hydroxide, “lime”101. List the names ofCa(OH)2

a. calcium hydroxide, “lime”b. sodium hydroxide, “lime”c. calcium hydroxide, “lye”102.List the names of Na2CO3

a. sodium carbonate, “washing soda”b. sodium bicarbonate, “caustic soda”c. sodium carbonate, “lye”103. Usually a symbol is not only a sign of an element, it also _________ one atom of that elementa. denotesb. is denotingc. has denoted104. The subscript “2” means that two atoms of the element oxygen ______together to form a moleculea. have joinedb. is joiningc. have been joining105. Iridosmine is a rare mineral. It ________ in Russia and in North and South Americaa. has been foundb. is finding

c. has found106. Beryllium was once used as a portable source of neutrons. Since the 19th century it _________ in medicine to produce radon gas, used for cancer treatmenta. has been usingb. usesc. has used107. By now, about 115 elements have been discovered out of which 92 have been found in nature and the rest are man-madea. have been discoveredb. is discoveringc. has been discovering108. Now lecturer _________ symbols and group of symbols as ‘short hand’ to conveniently represent elements, compounds and reactions between thema. is showingb. showsc. has shown109. Since 19th century Beryllium _______ as additive in products like toothpaste, hair creams and even food itemsa. has been usedb. is usedc. is using110. Match the word to form compoundA sunny …a. dayb. foodc. night111. Show the correct definition Atom is …a. The smallest particle of which an element can existb. A combination of chemical symbols that shows the composition of a compoundc. A sign of an element112. Show the correct definitionChemical formula is …a. A combination of chemical symbols that shows the composition of a compoundb. A sign of an elementc. The tendency of an atom to gain or lose electrons in reacting with other atoms113. Show the correct definitionCompound is …a.A substance that contains two or more elements combined in a fixed proportion.b. A combination of chemical symbols that shows the composition of a compoundc. The tendency of an atom to gain or lose electrons in reacting with other atoms

114. Show the correct definitionEmpirical is …a.Based on observation or experimentationb.A sign of an elementc.The tendency of an atom to gain or lose electrons in reacting with other atoms115. Show the correct definitionMolecule is …a. A particle formed by the combination of two or more atomsb. A sign of an elementc. Based on observation or experimentation116. Show the correct definitionValence is …a. The tendency of an atom to gain or lose electrons in reacting with other atomsb. A sign of an elementc. Based on observation or experimentation117. Show the correct definitionChemical equation is …a. A short and simple representation of a chemical reactionb. A sign of an elementc. Based on observation or experimentation118. Show the correct definitionSymbol is …a.A sign of an elementb. A short and simple representation of a chemical reactionc. Based on observation or experimentation119. Read the sentence and fill in the gaps with the following expressions in appropriate forms. There are four main states of matter: _________ , _________ , _________ and _________ . a.solid, liquid, gas, plasmab. energy, matter, vapor, gasc. liquid, gas, plasma, vapor120. Read the sentence and fill in the gaps with the following expressions in appropriate forms. Each of these states is also known as a _________ .a.phaseb. matterc. liquid