# The volumes of two HCl solutions A (0.5 N) and B (0.1 N) to be mixed for preparing 2 l of 0.2 N HCl solution

1.  0.5 l of A + 1.5 l of B

2.  1.5 l of A + 0.5 l of B

3.  1 l of A + 1 l of B

4.  0.75 l of A + 1.25 l of B

4

0.5 l of A + 1.5 l of B

Explanation :
No Explanation available for this question

# When 0.1 moles of an acid is added to 2 litres of a buffer solution, the pH of the buffer decreases by 0.5. The buffer capacity of the solution is

1.  0.6

2.  0.4

3.  0.2

4.  0.1

4

0.1

Explanation :
No Explanation available for this question

# Identify Bronsted-Lowry acids in the reaction given The correct answer is

1.  (A), (C)

2.  (B), (D)

3.  (A), (D)

4.  (B), (C)

4

(A), (D)

Explanation :
No Explanation available for this question

# The cell potential of the following cell at 250C (in volts) is (Pt) H2(1atm) H+(0.01 M) CU2+(0.1 M) CU

1.  0.308

2.  0.427

3.  0.308

4.  0.337

4

0.427

Explanation :
No Explanation available for this question

# Which one of the following reactions occurs at the cathode

1.  2OH- → H2O + 1/2 O2 + 2e-

2.  Ag → Ag+ + e-

3.  Fe2+ → Fe3+ + e-

4.  Cu2+ +2e- → Cu

4

Cu<sup>2+</sup> +2e<sup>-</sup> &#8594; Cu

Explanation :
No Explanation available for this question

# AB is an ionic solid. If the ratio of ionic radii of A+ and B- is 0.52.What is the coordination number of B-

1.  2

2.  3

3.  6

4.  8

4

6

Explanation :
No Explanation available for this question

# The rate constant of a first order reaction is 0.0693 min-1. What is the time (in minutes) required for reducing an initial concentration of 20 mol l-1 to 2.5 mol l-1

1.  40

2.  30

3.  20

4.  10

4

30

Explanation :
No Explanation available for this question

# A (g) → B (g) is a first order reaction. The initial concentration of A is 0.2 mol l-1. After 10 minutes, the concentration of B is found to be 0.18 mol l-1. The rate constant (in min-1 ) for the reaction is

1.  0.2303

2.  2.303

3.  0.693

4.  0.01

4

0.2303

Explanation :
No Explanation available for this question

# 100 cm3 of 0.1 M HCl and 100 cm3 of 0.1 M NaOH solutions are mixed in a calorimeter. If the heat liberated is "Q" kcal, the heat of neutralization (ΔH) (in kcal) of HCl (aq) and NaOH (aq) is

1.  10 Q

2.  -100 Q

3.  -1000 Q

4.  -Q

4

-100 Q

Explanation :
No Explanation available for this question

# Which one of the following reactions is an example of auto-catalysis

1.  2AsH3(s)→2As(s)+3H2(g)

2.

3.

4.

4