s and p Block Elements – Representative Elements Quiz:
Ques. Sulphuric acid reacts with PCl5 to give
(a) Thionyl chloride
(b) Sulphur monochloride
(c) Sulphuryl chloride
(d) ulphur tetrachloride
Ques. Slaked lime is used in the manufacture of
(a) Cement
(b) Fire bricks
(c) Pigment
(d) Medicine
Ques. A metal used in storage batteries is
(a) Copper
(b) Lead
(c) Tin
(d) Nickel
Ques. Potassium is kept in
(a) Alcohol
(b) Water
(c) Kerosene
(d) Liquid ammonia
Ques. Which of the following will not undergo hydrolysis in water?
(a) Ammonium sulphate
(b) Sodium sulphate
(c) Calcium sulphate
(d) All the salts will hydrolyse
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Ques. Pyrolusite is
(a) Carbonate ore
(b) Sulphur ore
(c) Silicon ore
(d) None of these
Ques. The difference of water molecules in gypsum and plaster of paris is
(a) 5/2
(b) 2
(c) ½
(d) 1½
Ques. The important method for the fixation of nitrogen is
(a) Haber
(b) Solvay
(c) Deacon
(d) Fischer method
Ques. Molten sodium is used in nuclear reactors to
(a) Absorb neutrons in order to control the chain reaction
(b) Slow down the fast neutrons
(c) Absorb the heat generated by nuclear fission
(d) Extract radio-isotopes produced in the reactor
Ques. The number of hydroxide ions produced by one molecule of sodium carbonate (Na2CO3) on hydrolysis is
(a) 1
(b) 2
(c) 3
(d) 4
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Ques. Sodium metal cannot be stored under
(a) Benzene
(b) Kerosene
(c) Alcohol
(d) Toluene
Ques. As the alkaline earth metals (except Be) tend to lose their valence electrons readily they act as
(a) Weak oxidising agent
(b) Weak reducing agent
(c) Strong oxidising agent
(d) Strong reducing agent
Ques. Nitrogen is essential constituent of all
(a) Proteins
(b) Fats
(c) Proteins and fats
(d) None of these
Ques. The reaction of water with sodium and potassium is
(a) Exothermic
(b) Endothermic
(c) Reversible
(d) Irreversible and endothermic
Ques. The first ionisation energies of alkaline earth metals are higher than those of the alkali metals. This is because
(a) There is increases in the nuclear charge of the alkaline earth metals
(b) There is decreases in the nuclear charge of the alkaline earth metals
(c) There is no change in the nuclear charge
(d) None of these
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Ques. Potassium nitrate is called
(a) Mohr’s salt
(b) Gypsum
(c) Indian salt petre
(d) Chile salt petre
Ques. As compared to potassium, sodium has
(a) Lower electronegativity
(b) Higher ionization potential
(c) Greater atomic radius
(d) Lower melting point
Ques. The number of hydrogen atom (s) attached to phosphorus atom in hypophosphorous acid is
(a) Zero
(b) Two
(c) One
(d) Three
Ques. The reactivity of the alkali metal sodium with water, is made use of
(a) In drying of alcohols
(b) In drying of benzene
(c) In drying of ammonia solution
(d) As a general drying agent
Ques. Which of the following has density greater than water?
(a) Li
(b) Na
(c) K
(d) Rb
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Ques. Calcium salts give which colour when put in a flame
(a) Brick red
(b) Green
(c) White
(d) Pink
Ques. The dark red colour of bombs in fireworks is due to the presence of
(a) Na
(b) Ba
(c) Sr
(d) K
Ques. Which of the elements listed below occurs in allotropic forms?
(a) Iodine
(b) Copper
(c) Sulphur
(d) Silver
Ques. Portland cement is manufactured by using
(a) Lime stone, clay and sand
(b) Lime stone, gypsum and sand
(c) Lime stone, gypsum and alumina
(d) Lime stone, clay and gypsum
Ques. The element having atomic number 56 belongs to
(a) Actinides
(b) Alkaline earth metals
(c) Transition series
(d) Lanthanides
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Ques. Iron pipes lying under acidic soil are often attached to blocks of magnesium for protection from rusting. Magnesium offers protection to iron against corrosion because it
(a) Prevents air from reaching the surface of iron
(b) is more readily converted into positive ions
(c) is higher than iron
(d) Forms a corrosion-resistance alloy with iron
Ques. When orthoboric acid (H3BO3) is heated, the residue left is?
(a) Metaboric acid
(b) Boron
(c) Borax
(d) Boric anhydride
