CBSE
When 10 mL of 0.1 M acetic acid (pKa = 5.0) is titrated against 10 ml of 0.1 M ammonia solution (pKb = 5.0), the equivalence point occurs at pH
5.0
6.0
7.0
9.0
Which of the following is a Lewis base ?
NaOH
NH3
BCl3
All of these
For reaction, 2NOCl (g) 2NO (g) + Cl2 (g), Kc at 427°C is 3 × 10-6 L mol-1. The value of Kp is nearly
7.50 × 10-5
2.50 × 10-5
2.50 × 10-4
1.75 × 10-4
In the reaction :
H2 + I2 2HI
In a 2 litre flask 0.4 moles of each H2 and I2 are taken .At equilibrium 0.5 moles of HI are formed .What will be the value of equilibrium constant ,Kc ?
20.2
25.4
0.284
11.11
KI and CuSO4 solution when mixed , give :
CuI2 + K2SO4
Cu2I2 + K2SO4
K2SO4 + Cu2I2 + I2
K2SO4 + CuI2 + I2
40 mL of 0.1 M ammonia solution is mixed with 20 mL. of 0.1 M HCl. What is the pH of the mixture? (pKb, of ammonia solution is 4.74)
4.74
2.26
9.26
5.00
F2 formed by reacting K2MnF6 with
SbF5
MnF3
KSbF6
MnF4
Which among the following is the strongest acid ?
HF
HCl
HBr
HI
For a phase change
For the chemical equilibrium,
CaCO3(s) CaO(s) + CO2(g)
can be determined from which one of the following plots?