CBSE
Multiple Choice QuestionsAssertion : Aqueous solution of CoCl2 is pink in colour. It turns blue in presence of conc. HCl.
Reason : It is due to the formation of [CoCl4]2-.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Which of the following is not a characteristic of equilibrium?
Rate is equal in both directions
Measurable quantities are constant at equilibrium.
Equilibrium occurs in reversible condition.
Equilibrium occurs only in open vessel at constant temperature.
Which of the following is not hygroscopic?
CsCl
MgCl2
CaCl2
LiCl
25 mL, 0.2 M Ca(OH)2 is neutralised by 10 mL of 1 M HCI. Then pH of resulting solution is
1.37
9
12
7
What will be the solubility product of AX3?
27S4
4S3
36S4
9S3
What is the pH of0.01 M glycine solution? For glycine Ka1= 4.5x10-3 and Ka2=1.7x10-10 298 K.
3.0
10.0
7.06
8.2
Predict the product of reaction of I2 with H2O2 in basic medium
I-
I2O3
IO
I
Solution of 0.l N NH4OH and 0.1 N NH4Cl has pH 9.25. Then , pKb of NH4OH is :
9.75
4.75
3.75
8.25
2SO2 (g) + O2 (g) is an example for :
neutralisation reaction
homogeneous catalysis
heterogeneous catalysis
irreversible reaction
The concentration of Ag+ ion in a given saturated solution of AgCl at 25°C is 1.06 x 10-5 g ion L-1 .Thus , the solubility product of AgCl is :
0.453 x 10-10
0.530 x 10-10
1.12 x 10-10
2.12 x 10-10
