Chapter 8 – Chemical Reactivity

Chemical Reactivity – MCQ’s

  1. Non-metals are essential

(a) for the maintenance

(b) for the existence

(c) for the safety of life  

(d) all of these   ✓

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

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(a) calcium

(b) carbon

(c) oxygen                 ✓

(d) nitrogen

  1. The electronegative and non-metallic character from top to bottom

(a) increases

(b) decreases              ✓

(c) remain same

(d) stable

  1. Chlorine only reacts with methane in

(a) darkness

(b) sunlight                 ✓

(c) yellow light

(d) screened light

  1. Chlorine has colour:

(a) pale yellow

(b) greenish yellow    ✓

(c) reddish brown

(d) purple black

  1. These are highly oxidizing agents

(a) alkali metals

(b) alkaline earth metals

(c) transition metals

(d) halogens  ✓

  1. The highest electronegative element in periodic table is

(a) fluorine              ✓

(b) chlorine

(c) bromine

(d) iodine

  1. The electronic configuration of halogens is

(a) ns2 np5

(b) ns2 np3

(c) ns3 np5                  ✓

(d) ns2 np2

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

(a) acidic             ✓

(b) basic

(c) neutral

(d) suboxide

  1. 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

  1. White gold is an alloy of

(a) gold + palladium + zinc

(b) palladium  + silver + nickel

(c) gold + silver + copper

(d) palladium  + nickel  + zinc  ✓

  1. The alkaline earth metals are smaller in size and have more

(a) ionization energy

(b) electron affinity    ✓

(c) nuclear change

(d) electropositive

  1. 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

  1. 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

  1. Copper, mercury, silver and gold are the examples of metals

(a) very reactive

(b) moderately

(c) least reactive       ✓

(d) none of these

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

(a) loses                ✓

(b) gains

(c) donates

(d) shares

  1. Metals which are easily oxidized are said

(a) negative metals

(b) state metals

(c) reactive metals           ✓

(d) non-reactive metals

  1. A metal in a compound always exists in which oxidation sate

(a) negative

(b) positive            ✓

(c) neutral

(d) zero

  1. Ionization energy of sodium is less than

(a) aluminum

(b) magnesium

(c) copper

(d) all of these  ✓

  1. All metals are solids except

(a) sodium

(b) magnesium

(c) mercury         ✓

(d) gold

  1. The most valuable metal among the following is

(a) Gold

(b) Uranium  ✓

(c) Osmium

(d) Rubidium

  1. The heaviest metal is

(a) Uranium

(b) Gold

(c) Osmium               ✓

(d) Calcium

  1. Lithium has density

(a) 0.53gcm-3                 ✓

(b) 1.53gcm-3

(c) 15.3gcm-3

(d) 3.5gcm3

  1. Mark which one is non-metal?

(a) Sodium

(b) Calcium

(c) Nitrogen               ✓

(d) Mercury

  1. Which one of the following will not react with HCl?

(a) Carbon            ✓

(b) Silver

(c) Zinc

(d) Copper

  1. Sodium does not react with

(a) Carbon

(b) Nitrogen

(c) Hydrogen

(d) Both a and b  ✓

  1. Which metal burns with golden yellow flame

(a) Calcium

(b) Barium

(c) Sodium                ✓

(d) Potassium

  1. Which metal is used in Thermite process to ignite aluminum powder

(a) Na

(b) Mg  ✓

(c) Ca

(d) Be

  1. Silver is get tarnished by

(a) Atmosphere oxygen

(b) Nitrogen

(c) Hydrogen sulphide         ✓

(d) Carbon dioxide

  1. Which metal is used for making mirrors?

(a) Lead

(b) Iron

(c) Silver               ✓

(d) Lithium

  1. Which one of the following metal has yellow colour

(a) Lead

(b) Gold  ✓

(c) Iron

(d) Potassium

  1. Gold is always alloyed with one, among the following metals

(a) Sodium

(b) Mercury

(c) Copper                ✓

(d) Calcium

  1. Sodium is used for the refining of which metal

(a) U

(b) Zn

(c) Ti                   ✓

(d) Zr

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

(a) Three                ✓

(b) Four

(c) Five

(d) Two

  1. Three transition elements Cu, Ag and Au constitute group number

(a) 9

(b) 10

(c) 11           ✓

(d) 12

  1. The least electronegative element among the halogens is

(a) Fluorine

(b) Chlorine

(c) Bromine

(d) Iodine  ✓

  1. Which of the following halogen has pale yellow colour?

(a) F2                ✓

(b) Cl2                     

(c) Br2

(d) I2

  1. Which one of the following makes covalent bond with halogens

(a) Na

(b) K

(c) O        ✓

(d) Mg

  1. Identify among the following which one is semimetal

(a) Lead

(b) Zinc

(c) Silicon

(d) Galium  ✓

  1. The general electronic valence shell configuration of alkali metals is

(a) ns2

(b) ns1              ✓        

  (c) ns2, np1

(d) ns2, np2

  1. Hydrogen is released when water reacts with

(a) Na

(b) Mg

(c) K

(d) All of them  ✓

  1. Which metal releases electron from its outermost shell the most easily

(a) Na

(b) K           ✓

(c) Mg

(d) Ca

  1. Which one among the halogens has least affinity with hydrogen?

(a) F2

(b) Cl2                 

     (c) Br2

(d) I2  ✓

  1. In diffused sun lights chlorine reacts with methane to form

(a) CH3Cl

(b)  CH2Cl2       

(c) CCL4

(d) All of above  ✓

  1. In the earth crust the highest %age of oxygen is

(a) 47%             ✓

(b) 86%

(c) 90%

(d) 24%

  1. The %age of oxygen in oceans is:

(a) 47%

(b) 86%         ✓

(c) 90%

(d) 24%

  1. The %age of oxygens in air is:

(a) 21%              ✓

(b) 24%

(c) 26%

(d) 30%

  1. Which one of the following will form amphoteric oxides?

(a) Na

(b) N

(c) Si                 ✓

(d) S

  1. Which halogen reacts with water in dark and cold state

(a) F2                     ✓

(b) Cl2                     

(c) Br2

(d) I2

  1. Indicate the least reactive metal among the following

(a) Gold                ✓

(b) Zinc

(c) Iron

(d) Tin

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