s-Block elements are present in which groups of periodic table
A Group 1 and 2
B Group 13 and 14
C Group 16 and 17
D Group 3 to 12
s-Block includes alkali and alkaline earth metals.
Alkali metals belong to
A Group 1
B Group 2
C Group 17
D Group 18
They have one electron in outermost shell.
Alkaline earth metals belong to
A Group 1
B Group 2
C Group 13
D Group 16
They have two valence electrons.
Which alkali metal is liquid at room temperature
A sodium
B potassium
C cesium
D lithium
Cesium melts near room temperature.
Alkali metals are highly reactive because they
A have high ionisation energy
B have large atomic size
C easily lose one electron
D have filled shells
Low ionisation energy makes them reactive.
Which alkali metal has the smallest atomic radius
A lithium
B sodium
C potassium
D rubidium
Atomic size increases down the group.
Reactivity of alkali metals
A decreases down the group
B remains same
C increases down the group
D is random
Ionisation energy decreases down the group.
Which alkali metal reacts most vigorously with water
A lithium
B sodium
C potassium
D cesium
Highest reactivity among alkali metals.
Alkali metals form which type of oxides
A acidic
B amphoteric
C basic
D neutral
Their oxides react with acids.
Which compound is used in soap manufacturing
A Na₂CO₃
B NaHCO₃
C NaOH
D KNO₃
Caustic soda is used in soap industry.
Washing soda is
A NaCl
B Na₂CO₃•10H₂O
C NaHCO₃
D K₂CO₃
Sodium carbonate decahydrate.
Baking soda is
A Na₂CO₃
B NaOH
C NaHCO₃
D Na₂SO₄
Sodium hydrogen carbonate.
Which gas is released when baking soda is heated
A CO
B CO₂
C O₂
D H₂
Causes cakes to rise.
Alkaline earth metals are harder than alkali metals because
A larger atomic size
B stronger metallic bonding
C lower density
D high electronegativity
Two valence electrons increase bonding strength.
Which alkaline earth metal is radioactive
A magnesium
B calcium
C barium
D radium
Radium is naturally radioactive.
Which alkaline earth metal compound is used in cement
A MgO
B CaO
C SrO
D BaO
Lime is essential in cement.
Which metal burns with dazzling white flame
A sodium
B potassium
C magnesium
D calcium
Used in fireworks and flash photography.
p-Block elements are present in
A Group 1–2
B Group 3–12
C Group 13–18
D Group 17 only
Includes metals, non-metals and metalloids.
Which element belongs to group 13
A nitrogen
B oxygen
C boron
D carbon
Boron group elements.
Boron is
A metal
B non-metal
C metalloid
D noble gas
Shows intermediate properties.
Which group is called carbon family
A Group 13
B Group 14
C Group 15
D Group 16
Carbon, silicon, etc.
Which element shows maximum catenation
A silicon
B germanium
C carbon
D tin
Strong C–C bond.
Nitrogen belongs to
A Group 14
B Group 15
C Group 16
D Group 17
Also called pnictogens.
Which oxide of nitrogen is neutral
A NO
B NO₂
C N₂O₅
D N₂O₃
Nitric oxide is neutral.
Which group is called chalcogens
A Group 14
B Group 15
C Group 16
D Group 17
Oxygen family.
Oxygen shows oxidation state
A only −2
B only 0
C −2, −1, +2
D only +2
Varies in compounds like peroxides.
Which group elements are halogens
A Group 15
B Group 16
C Group 17
D Group 18
Highly reactive non-metals.
Most electronegative element is
A oxygen
B nitrogen
C fluorine
D chlorine
Highest tendency to attract electrons.
Halogens exist as
A monoatomic
B triatomic
C diatomic
D polyatomic
Example: F₂, Cl₂.
Noble gases belong to
A Group 16
B Group 17
C Group 18
D Group 15
Completely filled valence shells.
Noble gases are chemically inert because
A high atomic mass
B low density
C completely filled valence shell
D large atomic size
Stable electronic configuration.
Which noble gas is used in balloons
A neon
B argon
C helium
D krypton
Light and non-flammable.
Which noble gas is used in electric bulbs
A helium
B neon
C argon
D radon
Prevents oxidation of filament.
Which p-block element shows allotropy
A nitrogen
B oxygen
C chlorine
D fluorine
Exists as O₂ and O₃.
Ozone is
A less reactive than oxygen
B more reactive than oxygen
C inert
D metallic
Strong oxidising agent.
Which oxide is amphoteric
A Na₂O
B Al₂O₃
C SO₂
D CO₂
Reacts with both acids and bases.
Which gas is known as laughing gas
A NO
B NO₂
C N₂O
D N₂O₅
Causes mild anaesthesia.
Which acid is strongest among halogen acids
A HF
B HCl
C HBr
D HI
Bond strength decreases down the group.
Which p-block element forms maximum covalent bonds
A carbon
B nitrogen
C phosphorus
D silicon
Small size and strong overlap.
Silicones are polymers containing
A C–C bonds
B Si–O–Si bonds
C C–O bonds
D Si–Si bonds
Alternating silicon and oxygen atoms.
Which compound is used as insecticide
A DDT
B NaCl
C CaCO₃
D NH₃
Organochlorine compound.
Which oxide causes acid rain
A CO
B SO₂
C NO
D N₂O
Forms sulphuric acid in atmosphere.
Which element is essential for chlorophyll
A iron
B magnesium
C calcium
D sodium
Central metal ion in chlorophyll.
Which non-metal is liquid at room temperature
A bromine
B iodine
C chlorine
D sulphur
Only liquid non-metal.
Which element is used in semiconductor industry
A aluminium
B silicon
C calcium
D sodium
Used in chips and transistors.
Which compound is bleaching agent
A NaCl
B Ca(ClO)₂
C Na₂SO₄
D NH₄Cl
Bleaching powder.
Which element has highest electronegativity in p-block
A oxygen
B nitrogen
C fluorine
D chlorine
Strongest electron-attracting power.
Which halogen shows maximum oxidising power
A iodine
B bromine
C chlorine
D fluorine
Highest electronegativity.
Which oxide is acidic
A MgO
B Na₂O
C SO₃
D Al₂O₃
Acid anhydride of H₂SO₄.
Correct statement is
A Alkali metals are less reactive than alkaline earth metals
B Noble gases are chemically reactive
C Fluorine is most electronegative element
D Boron is a typical metal
Fundamental periodic property.