Top 500+ 9th Class Chemistry Subject Mcqs Pdf Download Chapter 08

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CHAPTER NO 8

Chemical Reactivity

Encircle the most appropriate answer among the following options


1          Non-metals are essential

(a) for the maintenance

(b) for the existence

(c) for the safety of life

(d) all of these


2          It has the highest percentage in earth’s crust and oceans.

(a) calcium

(b) carbon

(c) oxygen

(d) nitrogen


3          The electronegative and non-metallic character from top to bottom

(a) increases

(b) decreases

(c) remain same

(d) stable


4          Chlorine only reacts with methane in

(a) darkness

(b) sunlight

(c) yellow light

(d) screened light


5          Chlorine has colour:

(a) pale yellow

(b) greenish yellow

(c) reddish brown

(d) purple black


6          These are highly oxidizing agents

(a) alkali metals

(b) alkaline earth metals

(c) transition metals

(d) halogens


7          The highest electronegative element in periodic table is

(a) fluorine

(b) chlorine

(c) bromine

(d) iodine


8          The electronic configuration of halogens is

(a) ns2 np5

(b) ns2np3

(c) ns3np5

(d) ns2 np2


9          Non-metals are electronegative in nature and form oxides.

(a) acidic

(b) basic

(c) neutral

(d) suboxide


10        It is used to make jewelry items because of its unique characteristics like colour beauty, strength, flexibility and resistance to tarnish.

(a) gold

(b) platinum

(c) silver

(d) copper


11        White gold is an alloy of

(a) gold + palladium + zinc

(b) palladium + silver + nickel

(c) gold + silver + copper

(d) palladium + nickel + zinc


12        The alkaline earth metals are smaller in size and have more

(a) ionization energy

(b) electron affinity

(c) nuclear change

(d) electropositive


13        All alkali metals have the largest size and the lowest in their respective periods.

(a) electro negativity

(b) ionization energy

(c) electron affinity

(d) electro positivity


14        Metals have the tendency to lose their valence electron. This property of a metal is termed as

(a) electro negativity

(b) electro positivity

(c) electron affinity

(d) ionization power


15        Copper, mercury, silver and gold are the examples of metals

(a) very reactive

(b) moderately

(c) least reactive

(d) none of these


16        Cation in formed, when an element – electron to its outermost shell

(a) loses

(b) gains

(c) donates

(d) shares


17        Metals which are easily oxidized are said

(a) negative metals

(b) state metals

(c) reactive metals

(d) non-reactive metals


18        A metal in a compound always exists in which oxidation sate

(a) negative

(b) positive

(c) neutral

(d) zero


19        Ionization energy of sodium is less than

(a) aluminum

(b) magnesium

(c) copper

(d) all of these


20        All metals are solids except

(a) sodium

(b) magnesium

(c) mercury

(d) gold


21        The most valuable metal among the following is

(a) Gold

(b) Uranium

(c) Osmium

(d) Rubidium


22        The heaviest metal is

(a) Uranium

(b) Gold

(c) Osmium

(d) Calcium


23        Lithium has density

(a) 0.53gcm-3

(b) 1.53gcm -3

(c) 15.3gcm -3

(d) 3.5gcm -3


24        Mark which one is non-metal?

(a) Sodium

(b) Calcium

(c) Nitrogen

(d) Mercury


25        Which one of the following will not react with HCI?

(a) Carbon

(b) Silver

(c) Zinc

(d) Copper


26        Sodium does not react with

(a) Carbon

(b) Nitrogen

(c) Hydrogen

(d) Both a and b


27        Which metal burns with golden yellow flame

(a) Calcium

(b) Barium

(c) Sodium

(d) Potassium


28        Which metal is used in Thermite process to ignite aluminum powder

(a) Na

(b) Mg

(c) Ca

(d) Be


29        Silver is get tarnished by

(a) Atmosphere oxygen

(b) Nitrogen

(c) Hydrogen sulphide

(d) Carbon dioxide


30        Which metal is used for making mirrors?

(a) Lead

(b) Iron

(c) Silver

(d) Lithium


31        Which one of the following metal has yellow colour

(a) Lead

(b) Gold

(c) Iron

(d) Potassium


32        Gold is always alloyed with one, among the following metals

(a) Sodium

(b) Mercury

(c) Copper

(d) Calcium


33        Sodium is used for the refining of which metal

(a) U

(b) Zn

(c) Ti

(d) Zr


34        How many series of d-block elements are there in the periodic

(a) Three

(b) Four

(c) Five

(d) Two


35        Three transition elements Cu, Ag and Au constitute group number

(a) 9

(b) 10

(c) 11

(d) 12


36        The least electronegative element among the halogens is

(a) Fluorine

(b) Chlorine

(c) Bromine

(d) Iodine


37        Which of the following halogen has pale yellow colour?

(a) F2

(b) Cl2

(c) Br2

(d) I2


38        Which one of the following makes covalent bond with halogens

(a) Na

(b) K

(c) O

(d) Mg


39        Identify among the following which one is semimetal

(a) Lead

(b) Zinc

(c) Silicon

(d) Galium


40        The general electronic valence shell configuration of alkali metals is

(a) ns2

(b) ns1

(c) ns2, np1

(d) ns2, np2


41        Hydrogen is released when water reacts with

(a) Na

(b) Mg

(c) K

(d) All of them


42        Which metal releases electron from its outermost shell the most easily

(a) Na

(b) K

(c) Mg

(d) Ca


43        Which one among the halogens has least affinity with hydrogen?

(a) F2

(b) CL2

(c) Br2

(d) I2


44        In diffused sun lights chlorine reacts with methane to form

(a) CH3CL

(b) CH2CL2

(c) CCL4

(d) All of above


45        In the earth crust the highest %age of oxygen is

(a) 47%

(b) 86%

(c) 90%

(d) 24%


46        The age of oxygen in oceans is:

(a) 47%

(b) 86%

(c) 90%

(d) 24%


47        The %age of oxygens in air is:

(a) 21%

(b) 24%

(c) 26%

(d) 30%


48        Which one of the following will form amphoteric oxides?

(a) Na

(b) Na

(c) Si  |

(d) S


49        Which halogen reacts with water in dark and cold state

(a) F2

(b) Cl2

(c) Br2

(d) I2


50        Select the least reactive metal among the following

(a) Gold

(b) Zinc

(c) Iron

(d) Tin