IIT JEE , AIEEE Forum - Chemistry , Physical Chemistry - few questionss i m struck with............

anki016

1) molar solubility of Al (OH)₃is increased in da presence of ......
a) NaOH b) HCl c)both d) none

2) blood pH is controlled by da concentrtion of H2CO3 and HCO3^- . in da presence of NaHCO3 pH of blood will..........
1.increases 2.decreases 3. remains same

3 ) ram starts travellin from a certain point and in successive days he travels distances which are in ap a=1 d=2 .........same does shyam but he starts three days later a=12 d = 1 ............find da no of days shyam will be ahead of ram...........

4) if a sphere is performin pure rollin motion .........wat can be said abt da acceleration of diff points on it..........

sparshagrwal

1. b
2. 1
3. after four days
4. acc would be decreasing

anki016

for third question give da number of days he ll be ahead of ram .........finally ram has to be ahead..............

4)how acc wud be decreasin ..........wud dat b for all da points......

plz post da explanation tooooooooo
even for second................

sandeepramesh

for 1 i would say a as complexation increases solubility

akshay.khare91

1 . b

since Al(OH)3 will give OH ions in water and HCl will give H ions
hence in the presence of HCl the OH ion reacts with H ion to form water
hence the concentration of product will decrease and according to
le - chatliers pricciple reaction will shift in forward direction hence
solubility of Al(OH)3 will increase..

2.b
since the NaHCO3 will dissociate into Na ion and HCO3 ion and
this Na ion will react with blood's HCO3 to form NaHCO3
hence the concentration of H ion will decrease and PH will
decrease..

3 after four days..

4.acceleration of all points will be same..

anki016

ram : 1 3 5 7 9...........
shyam : 12 13............

on da fifth day we see they have travelled equal distances......so how on fourth day he wud ahead of rammmm n by da way tell me finally how many days shyam ll b ahead of ram..........in the end ram has to ahead of shyam..............

harsha_27

The answer to your 3rd question is 9 days.
I mean for a duration of 9 days Shyam will be ahead of Ram after which Ram overtakes.

Ask & Discuss Questions with Community & Experts