Which one of the following is true for any diprotic acid, H2 X ?
The conjugate acid of is
N2H4
NH2OH
NH3
Which of the following molecules act as a Lewis acid ?
(CH3 )3 B
(CH3 )2 O
(CH3 )3 P
(CH3 )3 N
The compound whose aqueous solution has the highest pH is
NaCI
NaHCO3
Na2CO3
NH4CI
Solution of 0.1 NH4OH and 0.1 N NH4CI has pH 9.25, then find out pKb of NH4OH
9.25
4.75
3.75
8.25
Which has highest pH ?
CH3COOK
NaNO3
Calculate the pOH of a solution at 25oC that contains 1 ×10-10 M of hydronium ions.
7.00
4.00
9.00
1.00
The pH value of blood does not change appreciably by a small addition of an acid or base, because the blood
is a body fluid
can be easily coagulated
contains iron as a part of the molecule
contains serum protein that acts as buffer
The solubility product of AgI at 25o C is 1.0 × 10-16 mol2 L-2. The solubility of AgI in 10-4 N solution of KI at 25oC is approximately (in mol L-1)
1.0 × 10-10
1.0 × 10-8
1.0 × 10-16
1.0 × 10-12
The hydride ion H- is stronger base that its hydroxide ion OH-. Which of the following reactions will occur if sodium hydride (NaH) is dissolved in water ?
2H- (aq) + H2 O(l) → H2 O + H2 + 2e-
H- (aq) + H2 O(l) → OH- + H2
H- + H2 O(l) → no reaction
None of the above
