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Potential of a Std. half cell is measured by potentiometer connecting it with S .11.E. here S.H.E. act as anode then potential of half cell would be equals to
will be the decrease in the concentration Of $ Ni ^ {2+}_{(aq)} When the reaction Co_(s) + Ni ^ {2+} _{(aq, 0.1 M )} \rightleftharpoons Co^{2+} _{(aq, 0.01 M )} + Ni _{(S)} $ reaches the equilibrium ?
The alkali metals are low melting. Which of the following alkali metal is expected to melt if the room tempreature rises to $30^\circ C$ ?
Melting point decreases as the strength of metallic bonding decreases with increasing size of the atom.
Metal carbonates decompose on heating to give metal oxide and carbondioxide. Which of the metal carbonates is most stable thermally ?
Thermal stability of metal carbonates increases as the electropositive character of the metal or the basicity of the metal hydroxide increases from $ Be(OH)_2 to Ba(OH)_2, Thus, BaCO_3 $ is the most stable.
Which of the following metal hydroxide is the least basic ?
As the ionisation enthalpy increases from $ Mg \rightarrow Ba $ the M - O bond becomes weaker and weaker down the group, and hence basicity increases down the group. Thus, $ Mg(OH)_2 $ is least basic.
How many of the following sulphates of metals dissolve in the water ? $ SrSO_4, K_2SO_4, BeSO_4, Li_2SO_4, MgSO_4, BaSO_4, Na_2SO_4, CaSO_4, Rb_2SO_4 $
$ 6 [K_2SO_4, BeSO_4, Li_2SO_4, MgSO_4, Na_2SO_4, Rb_2SO_4] $
How many of the following hydroxides is/are amphoteric in character ? $ CsOH, LiOH, Ca(OH)_2, Be(OH)_2, Mg(OH)_2, Sr(OH)_2, Ba(OH)_2, KOH, NaOH. $
$ 1 [Be(OH)_2] $
Out of Li, Na, K, Rb and Cs how many of them directly form superoxides on heating with oxygen ?
3[K, Rb, Cs]
Which of the following statements is/are correct for “when alkali metals are dissolved in liquid ammonia. We get...â€
Which of the following pairs of elements possess diagonal relationship ?
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.