# The entropy of a perfect crystalline solid at absolute zero is

1.  Positive

2.  Negative

3.  Zero

4.  Immpossible to know

4

Zero

Explanation :
No Explanation available for this question

# The reaction A to B is not feasible but on changing entropy through a series of steps. A→C→D→B,ΔS(A→C)=50eu, ΔS(C→D)=30eu, ΔS(B→D)=20eu. The entropy chang for A→B would be

1.  100 eu

2.  60 eu

3.  -60 eu

4.  -100 eu

4

60 eu

Explanation :
No Explanation available for this question

# An isolated system is that system in which

1.  There is no exchange of energy with the surroundings

2.  There is exchange of mass and energy with the surroundings

3.  There is no exchange of mass and energy with the surroundings

4.  There is exchange of mass with surroundings

4

There is exchange of mass with surroundings

Explanation :
No Explanation available for this question

# The enthalpy change for a reaction does not depend upon

1.  Use of different reactants for the same product

2.  The nature of intermediate reaction steps

3.  The difference in the initial and final temperature of the involved substances

4.  The physical state of the reactants and products.

4

The nature of intermediate reaction steps

Explanation :
No Explanation available for this question

# Entropy change in an isothermal expansion of one mole of an ideal gas from volume V1 to V2 is

1.  RlnV2/V1

2.  2.303RlnV2/V1

3.  RlnV1/V2

4.  Rln(V2-V1)

4

RlnV2/V1

Explanation :
No Explanation available for this question

# In exothermic reaction (Hf=enthalpy reactants and Hp=enthalpy of products)

1.  Hr

2.  Hr>Hp

3.  Hr=Hp

4.  Hr=Hp and Hp=0

4

Hr>Hp

Explanation :
No Explanation available for this question

# Change in enthalpy for the reaction: 2H2O2(g)→2H2O(l)+O2(g)If heat of formation of H2O2(l)and H2O(l)are -188kJ mol-1and -286kJ mol-1respectively is

1.  -196kJ mol-1

2.  +196kJ mol-1

3.  +948kJ mol-1

4.  -948kJ mol-1

4

-196kJ mol-1

Explanation :
No Explanation available for this question

# Which of the following is not an intensive property

1.  Entropy

2.  Pressure

3.  Temperature

4.  Molar volume

4

Entropy

Explanation :
No Explanation available for this question

# Which of the following is not an ore

1.   Bauxite

2.   Malachite

3.   Zinc blende

4.  Pig iron

4

Pig iron

Explanation :
No Explanation available for this question

# Calcination is carried out in a

1.   Blast furnace

2.   Electric furnace

3.   Bessemer convertor

4.   Reverberatory furnace

4