# the activation energy for forward reaction is 25k.cal/mole and that of backward reaction is 15k.cal/mole. Which one o

1.  It is reaction for which H=35

2.  It is reaction for which ?H=0

3.  It is an endothermic process

4.  It is an exothermic process

4

It is an endothermic process

Explanation :
No Explanation available for this question

# For a given reaction which one is higher than the rest among the following

1.  Normal energy

2.  Activation energy

3.  Threshold energy

4.  Average energy

4

Threshold energy

Explanation :
No Explanation available for this question

# An endothermic reaction A→B has an activation energy 15 kCal/mole and energy of the reaction is 5 kCal/mole. The activation energy of the reaction B→A is

1.  5 K cal/mole

2.  10 K cal/mole

3.  15 K cal/mole

4.  20 K cal/mole

4

10 K cal/mole

Explanation :
No Explanation available for this question

# The rate equation for the reaction A+2B→products is rate=K[A][B]2. If the volume of the vessel is decreased to half of the initial volume the reaction rate bears the following relation to the original rate

1.  8 times

2.  4 times

3.  2 times

4.  1/2

4

8 times

Explanation :
No Explanation available for this question

# In an open system

1.  Neither energy nor matter are exchanged

2.  Both energy and mater are exchanged with surroundings

3.  Only matter is exchanged with surroundings.

4.  Only energy is exchanged with surroundings

4

Both energy and mater are exchanged with surroundings

Explanation :
No Explanation available for this question

# First law of thermodynamics is also known as

1.  Law of dis proportination

2.  Law of multiple proportions

3.  Law of conservation of mass

4.  Law of conservation of energy

4

Law of conservation of energy

Explanation :
No Explanation available for this question

# Correct expression among the following:

1.  P=E+HV

2.  H=EPV

3.  H=E+PV

4.  E=H+PV

4

H=E+PV

Explanation :
No Explanation available for this question

# The reaction which proceeds with evolution of heat is called

1.  Neither endothermic nor exothermic

2.  May be exothermic and endothermic

3.  Endothermic

4.  Exothermic

4

Exothermic

Explanation :
No Explanation available for this question

# Which of the following is an endothermic reaction

1.  PCl3(g)+Cl2(g)→PCl5(g)

2.  3H2(g)+N2(g)→2NH3(g)

3.  N2(g)+O2(g)→2NO(g)

4.  C(s)+O2(g)→CO2(g)

4

N2(g)+O2(g)→2NO(g)

Explanation :
No Explanation available for this question

# A system absorbs 10kJ of heat and does 4kJ of work. The internal energy of the system

1.  Increases by 14kJ

2.  Decreases by 14kJ

3.  Increases by 6kJ

4.  Decreases by 6kJ

4