Solid State Chemistry Mcqs

Q:

In the solid state reaction when MgO and F?O? reacts to form MgFe?O?,it is clear found that the interfaces moved in the ratio of 1:2.7,close to the ideal value 1:3.This is can be described by which of the following mechanism in which the movement of the interfaces is used as a marker?

A) Kirkedall Effect B) Grignard Reaction
C) Michael Reaction D) Aldol Reaction
 
Answer & Explanation Answer: A) Kirkedall Effect

Explanation: Not available for this question

View Answer Discuss

98
Q:

In the solid state reaction, which mechanism describes the reaction between MgO and Al?O? for the formation of MgAl?O??

A) Mannich reaction B) Aromic ion mechanism
C) Wagner mechanism D) Witting reaction
 
Answer & Explanation Answer: C) Wagner mechanism

Explanation: Not available for this question

View Answer Discuss

168
Q:

What are the major important factors for the solid state reactions?

A) Size of the particles B) Mechanical properties of solids
C) Thermodynamic and kinetic factors D) Environmental factors
 
Answer & Explanation Answer: D) Environmental factors

Explanation: In Solid state reactions thermodynamic factors show whether or not a particular reaction should occur by considering the change in free energy that are involved and kinetic factors determine the rate at which the reaction occurs.

View Answer Discuss

301
Q:

For the preparation of polycrystalline solids (i.e. powder), a mixture of solid starting materials directly react with each other in the solid state. What is the range of the temperature usually required for the solids to react together in Celsius?

A) 25 to 37 B) 1000 to 1500
C) -25 to 0 D) 2000 to 3000
 
Answer & Explanation Answer: B) 1000 to 1500

Explanation: Solids don’t react usually at room temperature over normal scale timescale, It is required to heat them at much higher temperature often 1000?C to 1500?C, in order for a reaction to occur at an appreciable rate.

View Answer Discuss

1191