JEE Questions for Chemistry Sblock Elements Quiz 1 - MCQExams.com

Bleaching powder is obtained by treating chlorine with
  • CaCO3
  • Ca(OH)2
  • CaO
  • None of these
Solvay process is used for the manufacture of
  • NaOH
  • Na2 CO3
  • NH3
  • NaCl
On strong heating sodium bicarbonate changes into
  • sodium monoxide
  • sodium hydroxide
  • sodium carbonate
  • sodium peroxide
The function of Sodium pump is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a consituent of this pump :
  • Mg2+
  • K+
  • Fe2+
  • Ca2+
Most powerful reducing agent is
  • Li
  • Na
  • Ca
  • Mg
The activity of alkaline earth metals as reducing agent
  • decreases from Be to Ba
  • increases from Be to Ba
  • increases from Be to Ca and decreases from Ca to Ba
  • decreases from Be to Ca and increases from Ca to Ba
In curing cement plasters water is sprinkled from time to time. This helps in
  • keeping it cool
  • developing interlocking needle—like crystals of hydrated silicates
  • hydrating sand and gravel mixed with cement
  • converting sand into silicic acid
The wire of flash bulb is made of ...
  • Mg
  • Cu
  • Ba
  • Ag
Lithium shows diagonal relationship with
  • sodium
  • magnesium
  • calcium
  • aluminium
Sodium carbonate is manufactured by
  • Castner - Kellner
  • Solvay process
  • oxidation
  • transmission process
Which of the following alkali metal ions has lowest ionic mobility in aqueous solution?
  • Rb+
  • Cs+
  • Li+
  • Na+
All the s-block elements of the periodic table and placed in the groups
  • I A and II A
  • III A and IV A
  • B subgroups
  • V A to VII A
Molten sodium chloride conducts electricity through the following
  • free electrons
  • free ions
  • free molecules
  • free atoms
The reaction between sodium and water can be made less vigorous by
  • adding a little alcohol
  • amalgamating sodium
  • adding a little acetic acid
  • lowering the temperature
What happens when aluminium and zinc salts react with an excess of NaOH?
  • White precipitate is formed
  • White precipitate of both Zn and Al first formed redissolved in excess of NaOH
  • White precipitate of Al redissolves but that of Zn does not
  • White precipitate of Zn redissolves and that of Al does not
Which property of Na 2 S2 O3 makes it useful in photography?
  • Photochemical property
  • Complex formation property
  • Oxidising agent
  • Reducing agent
The ease of adsorption of the hydrated alkali metal ions on an ion-exchange resins follows the order :

  • Chemistry-sBlock Elements-6878.png
  • 2)
    Chemistry-sBlock Elements-6879.png

  • Chemistry-sBlock Elements-6880.png

  • Chemistry-sBlock Elements-6881.png

Chemistry-sBlock Elements-6882.png
  • Na
  • K
  • Rb
  • Li
Which of the following properties of lithium does not show diagonal relationship with magnesium?
  • Formation of Li+ ion
  • Formation of Li3 N
  • Solubility of LiHCO3
  • Thermal decomposition of Li 2 CO3
The most electropositive element in alkali metals, is
  • Na
  • K
  • Rb
  • Cs
When KI is added to acidified solution of sodium nitrite then
  • NO gas is liberated and I2 is set free
  • N2 gas is liberated and HI is produced
  • N2O gas is liberated and I2 is set free
  • N2 gas is liberated and HOI is produced
Sodium thiosulphate is a
  • reducing agent
  • oxidising agent
  • complexing agent
  • bleaching agent
Which of the following is correct?
  • In the Castner's process of sodium extraction, NaCl is used as an electrolyte
  • Sodium reduces CO2 to carbon
  • Mg reacts with cold water and liberate hydrogen gas.
  • Magnalium is an alloy of Mg and Zn
One of the elements present in carnallite shows flame colouration. The colour of the flame is
  • orange
  • green
  • yellow
  • lilac
The sequence of ionic mobility in aqueous solution is :

  • Chemistry-sBlock Elements-6883.png
  • 2)
    Chemistry-sBlock Elements-6884.png

  • Chemistry-sBlock Elements-6885.png

  • Chemistry-sBlock Elements-6886.png
The starting material used in Solvay\'s process is
  • sodium sulphate
  • brine solution
  • carnallite
  • All of these
In Down's method for the extraction of sodium, the melting point of the electrolyte is lowered by adding
  • potassium chloride
  • calcium chloride
  • both calcium chloride and potassium fluoride
  • potassium fluoride only
Shine at freshly cut sodium is because of
  • due to oscillation of free electrons
  • due to weak metallic bonding
  • due to absorption of light in crystal lattice
  • due to presence of free valency at the surface
The ionic mobility of alkali metal ions in aqueous solution is maximum for
  • K+
  • Rb+
  • Li+
  • Na+
Which of the following dissolves in hot conc. NaOH solution?
  • Fe
  • Zn
  • Cu
  • Ag
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