# What are the oxidation numbers of nitrogen in NH4NO3

1.  +3, -5

2.  -3, +5

3.  +3, -6

4.  +2, +2

4

-3, +5

Explanation :
No Explanation available for this question

# The r,m.s. velocity of CO2 at a temperature T (in kelvin) is x cm sec-1. At what temperature (in kelvin), the r.m.s. velocity of nitrous oxide would be 4xcm sec-1

1.  16 T

2.  2 T

3.  4 T

4.  32 T

4

16 T

Explanation :
No Explanation available for this question

# n moles of an ideal gas at temperature T (in kelvin) occupy VL of volume, exerting a pressure of P atmospheres.What is the concentration (in mol / L)

1.  P / RT

2.  PT / R

3.  RT / P

4.  R / PT

4

P / RT

Explanation :
No Explanation available for this question

# 250 ml of a sodium carbonate solution contains 2.65 g of Na2CO3. If 10 ml of this solution is diluted to one litre, what is the concentration of the resultant solution

1.  0.1 M

2.  0.001 M

3.  0.01 M

4.  10-4 M

4

0.001 M

Explanation :
No Explanation available for this question

# The pKa of a weak acid is 4.8. What should be the ratio of [acid] / [salt], if a buffer of pH = 5.8 is required

1.  0.1

2.  10

3.  1

4.  2

4

0.1

Explanation :
No Explanation available for this question

# Which of the following would produce a buffer solution when mixed in equal volumes

1.  1 M CH3COOH and 0.5 M NaOH

2.  1 M CH3COOH and 0.5 M HCl

3.  1 M NH4OH and 0.5 M NaOH

4.  1 M NH4Cl and 0.5 M HCl

4

1 M CH<sub>3</sub>COOH and 0.5 M NaOH

Explanation :
No Explanation available for this question

# One ampere of current is passed for 9650 seconds through molten AlCl3. What is the weight in grams of Al deposited at cathode (atomic weight of Al = 27)

1.  0.9

2.  9.0

3.  0.09

4.  90.0

4

0.9

Explanation :
No Explanation available for this question

# Molten CuCl2 is electrolysed using platinum electrodes. The reaction occuring at anode is:

1.  2Cl- → Cl2(g) + 2e-

2.  Cl2(g) + 2e- → 2Cl

3.  Cu+2 + 2e- → Cu(s)

4.  Cu(s) → Cu2+ + 2e-

4

2Cl<sup>-</sup> &#8594; Cl<sub>2</sub>(g) + 2e<sup>-</sup>

Explanation :
No Explanation available for this question

# Equilibrium constant for the reaction H2O (g) + CO (g) ⇌ H2 (g) + CO2 (g) is 81, If the velocity constant of the forward reaction is 162 L mol

1.  13122

2.  2

3.  261

4.  243

4

2

Explanation :
No Explanation available for this question

1.  2 x 10-2

2.  10-2

3.  5 x 10-3

4.  0.1

4