Long QuestionsChemical Reactivity – MCQ’s
- Non-metals are essential
(a) for the maintenance
(b) for the existence
(c) for the safety of life
(d) all of these ✓
- It has the highest percentage in earth’s crust and oceans.
(a) calcium
(b) carbon
(c) oxygen ✓
(d) nitrogen
- The electronegative and non-metallic character from top to bottom
(a) increases
(b) decreases ✓
(c) remain same
(d) stable
- Chlorine only reacts with methane in
(a) darkness
(b) sunlight ✓
(c) yellow light
(d) screened light
- Chlorine has colour:
(a) pale yellow
(b) greenish yellow ✓
(c) reddish brown
(d) purple black
- These are highly oxidizing agents
(a) alkali metals
(b) alkaline earth metals
(c) transition metals
(d) halogens ✓
- The highest electronegative element in periodic table is
(a) fluorine ✓
(b) chlorine
(c) bromine
(d) iodine
- The electronic configuration of halogens is
(a) ns2 np5
(b) ns2 np3
(c) ns3 np5 ✓
(d) ns2 np2
- Non-metals are electronegative in nature and form oxides.
(a) acidic ✓
(b) basic
(c) neutral
(d) suboxide
- 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
- White gold is an alloy of
(a) gold + palladium + zinc
(b) palladium + silver + nickel
(c) gold + silver + copper
(d) palladium + nickel + zinc ✓
- The alkaline earth metals are smaller in size and have more
(a) ionization energy
(b) electron affinity ✓
(c) nuclear change
(d) electropositive
- 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
- 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
- Copper, mercury, silver and gold are the examples of metals
(a) very reactive
(b) moderately
(c) least reactive ✓
(d) none of these
- Cation in formed, when an element – electron to its outermost shell
(a) loses ✓
(b) gains
(c) donates
(d) shares
- Metals which are easily oxidized are said
(a) negative metals
(b) state metals
(c) reactive metals ✓
(d) non-reactive metals
- A metal in a compound always exists in which oxidation sate
(a) negative
(b) positive ✓
(c) neutral
(d) zero
- Ionization energy of sodium is less than
(a) aluminum
(b) magnesium
(c) copper
(d) all of these ✓
- All metals are solids except
(a) sodium
(b) magnesium
(c) mercury ✓
(d) gold
- The most valuable metal among the following is
(a) Gold
(b) Uranium ✓
(c) Osmium
(d) Rubidium
- The heaviest metal is
(a) Uranium
(b) Gold
(c) Osmium ✓
(d) Calcium
- Lithium has density
(a) 0.53gcm-3 ✓
(b) 1.53gcm-3
(c) 15.3gcm-3
(d) 3.5gcm3
- Mark which one is non-metal?
(a) Sodium
(b) Calcium
(c) Nitrogen ✓
(d) Mercury
- Which one of the following will not react with HCl?
(a) Carbon ✓
(b) Silver
(c) Zinc
(d) Copper
- Sodium does not react with
(a) Carbon
(b) Nitrogen
(c) Hydrogen
(d) Both a and b ✓
- Which metal burns with golden yellow flame
(a) Calcium
(b) Barium
(c) Sodium ✓
(d) Potassium
- Which metal is used in Thermite process to ignite aluminum powder
(a) Na
(b) Mg ✓
(c) Ca
(d) Be
- Silver is get tarnished by
(a) Atmosphere oxygen
(b) Nitrogen
(c) Hydrogen sulphide ✓
(d) Carbon dioxide
- Which metal is used for making mirrors?
(a) Lead
(b) Iron
(c) Silver ✓
(d) Lithium
- Which one of the following metal has yellow colour
(a) Lead
(b) Gold ✓
(c) Iron
(d) Potassium
- Gold is always alloyed with one, among the following metals
(a) Sodium
(b) Mercury
(c) Copper ✓
(d) Calcium
- Sodium is used for the refining of which metal
(a) U
(b) Zn
(c) Ti ✓
(d) Zr
- How many series of d-block elements are there in the periodic
(a) Three ✓
(b) Four
(c) Five
(d) Two
- Three transition elements Cu, Ag and Au constitute group number
(a) 9
(b) 10
(c) 11 ✓
(d) 12
- The least electronegative element among the halogens is
(a) Fluorine
(b) Chlorine
(c) Bromine
(d) Iodine ✓
- Which of the following halogen has pale yellow colour?
(a) F2 ✓
(b) Cl2
(c) Br2
(d) I2
- Which one of the following makes covalent bond with halogens
(a) Na
(b) K
(c) O ✓
(d) Mg
- Identify among the following which one is semimetal
(a) Lead
(b) Zinc
(c) Silicon
(d) Galium ✓
- The general electronic valence shell configuration of alkali metals is
(a) ns2
(b) ns1 ✓
(c) ns2, np1
(d) ns2, np2
- Hydrogen is released when water reacts with
(a) Na
(b) Mg
(c) K
(d) All of them ✓
- Which metal releases electron from its outermost shell the most easily
(a) Na
(b) K ✓
(c) Mg
(d) Ca
- Which one among the halogens has least affinity with hydrogen?
(a) F2
(b) Cl2
(c) Br2
(d) I2 ✓
- In diffused sun lights chlorine reacts with methane to form
(a) CH3Cl
(b) CH2Cl2
(c) CCL4
(d) All of above ✓
- In the earth crust the highest %age of oxygen is
(a) 47% ✓
(b) 86%
(c) 90%
(d) 24%
- The %age of oxygen in oceans is:
(a) 47%
(b) 86% ✓
(c) 90%
(d) 24%
- The %age of oxygens in air is:
(a) 21% ✓
(b) 24%
(c) 26%
(d) 30%
- Which one of the following will form amphoteric oxides?
(a) Na
(b) N
(c) Si ✓
(d) S
- Which halogen reacts with water in dark and cold state
(a) F2 ✓
(b) Cl2
(c) Br2
(d) I2
- Indicate the least reactive metal among the following
(a) Gold ✓
(b) Zinc
(c) Iron
(d) Tin