s-Block Flashcards
Half life of Francium?
21 mins
Color of flames mnemonics?
Can You Veto Red Bull
Which has the least E naught value among alkali elements
Na
Li reacts less vigorously with water because?
Small and hydration enthalpy
MOH reacts with proton donors like?
Alcohols, gaseous ammonia, alkynes
The order is Li > Na > I – > Ag > Cl–
k
White metal is an alloy of
Lithium + lead
Coolant for fast breeder nuclear reactions?
Liquid Na
Hydroxide used for soft soap
KOH
∆f H values for fluorides
become ___________ as we go down the group
less negative
The melting and boiling points for alkali halides always
follow the trend
F>Cl>Br>I
As the _________________ increases down the group, the stability of the carbonates and hydorgencarbonates increases.
electropositive character
Name the cathode and anode in Castner Kellner cell
Cathode is mercury, anode is carbon
Na-K pump consumes?
More than 1/3rd of the ATP for resting human
Mnemonics for color of flame alkaline
Ca, Sr, Ba–> Basic Characteristic And all
Springs are made of what allows?
Cu-Be
Dehydration of Be and Mg halides cause?
Hydrolysis
The aqueous solution of Ca(OH)2 is known as ___________ and a
suspension of slaked lime in water is known
as ___________
lime water, milk of lime
What is dead burnt plaster?
CaSO4, 393K
Why does the solubility of alkaline earth
metal hydroxides in water increase down
the group?
Since lattice enthalpy decreases much
more than the hydration enthalpy with
increasing ionic size, the solubility
increases as we go down the group
Why does the solubility of alkaline earth
metal carbonates and sulphates in water
decrease down the group?
The size of anions being much larger compared to cations, the lattice enthalpy will remain almost constant within a particular group. Since the hydration enthalpies decrease down the group, solubility will decrease as found for alkaline earth metal carbonates and sulphates
Na in body?
K in body?
Naintyg
170g
A typical 70 kg man contains about 90 g of Na
and 170 g of K compared with only __ g of iron
and _ g of copper.
Feive
0.06
An adult body contains about __ g of Mg and
__ g of Ca
25
1200
