Ionic conductance of hydrated M+
ions are in

the order -

A blue coloured solution of sodium in liquid NH3
acts strong reducing agent, because of

Gypsum CaSO4

.2H2O on heating to about
120oC forms plaster of pairs which has chemical
composition represented by -

The useful by-products, obtained in the Solvay
process of manufacture of sodium carbonate,
are -

On passing excess of CO2

in lime water, its
milky appearance disappears because -

Which gives least basic oxide

The weakest base among NaOH, Ca(OH)2
, KOH

and Mg(OH)2
is -

Which will react with acid and alkalies both (i.e.,
amphoteric) -

Sodium sulphate is soluble in water whereas
barium sulphate is sparingly soluble because -
(1) the hydration energy of Na2SO4
is less than

its lattice energy
(2) the hydration energy of Na2SO4

is more than

its lattice energy
(3) the lattice energy of BaSO4

is more than its

hydration energy
(4) the lattice energy has no role to play in
solubility

Consider the following points -
(1) Cs is the strongest reducing agent in IA group
element
(2) Be does not form peroxide in II A group
elements
(3) The density of potassium is less than sodium
(4) In alkali metals Li, Na, K and Rb, lithium
has the minimum value of M.P. Correct
statement are -

The reaction of sodium with water is highly
exothermic the rate of reaction can be lowered
by -

Alkali metals are soluble in liquid NH3
. As the
concentration of metal increases, solution turns
blue to bronze. It reflects the change in magnetic
property of the solution -

Thermal stability of hydrides of first group
elements follows the order

On dissolving moderate amount of sodium metal
in liquid NH3

at low temperature, which one of

the following does not occur

Maximum solubility would be of -

A piece of magnesium ribbon was heated to
redness in an atmosphere of nitrogen and on
cooling water was added, the gas evolved was

Compounds of alkaline earth metals are less
soluble in water than corresponding alkali
metals due to -

BeF2

is soluble in water, whereas, the fluorides
of other alkaline earth metals are insoluble
because of -

A salt is soluble in water if its -

A compound of calcium (X) is used in sugar
industry for the purification of sugar. When
exposed to an oxy-hydrogen flame, it becomes
incandascent and starts emiting white light. On
treatment with CO2

it forms a compound, which
can be decomposed to give back X at very high
temperature. X is -

The solubilities of sulphates of alkaline earth
metals decrease from Be to Ba because

Which of the following has correct increasing
basic strength

On prolonged exposure to air,sodium finally
changes to

Lithium is the only alkali metal which is not
placed in kerosene but is wrapped in paraffin
wax, because

The raw material used in the Solvay process for
the manufacture of sodium carbonate comprises

Crystals of washing soda lose nine molecules
of water when exposed to dry air. This
phenomenon is known as -

Considering greater polarization in LiCl as
compared to that in NaCl, which of the following
statements you would expect to be wrong

Which of the following is wrong -

Melting point of calcium halides decreases in
the order

One mole of a substance (A) on reacting with
excess of water, gives two mole of readily
combustible gas and an alkanline solution. The
alkaline solution gives white turbidity with (CO2
).

The substance (A) is -

Sodium carbonate is manufactured by Solvay
process, the products that are recycled are -

The right order of the solubility of sulphates of
alkaline earth metals in water is

Highest temperature for thermal dissociation
would be observed for

The pair of amphoteric hydroxides is -

A metal M readily forms its sulphate MSO4
which is water soluble. It forms oxide MO which
becomes inert on heating. It forms insoluble
hydroxide which is soluble in NaOH. The metal
M is -

KO2

is used in space and submarines because
it -

In current cement plasters, water is sprinkled
from time to time. This helps in -

The solubilities of carbonates decreases down
the magnesium group due to decrease in -

The substance not likely to contain CaCO3
is -

One mole of magnesium nitride on reaction with
excess of water gives -

Beryllium and aluminium exhibit many properties
which are similar. But the two elements differ in

The ionic mobility of alkali metal ions in aqueous
solution is maximum for

Which one of the following is the correct
statement ?

The following compounds have been arranged
in order of their increasing thermal stabilites.
Identify the correct order -
K2CO3 (I) MgCO3
(II)

CaCO3
(III) BeCO3
(IV)

A sodium salt of unknown anion when treated
with MgCl2

gives white precipitate only on

boiling. The anion is -