MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions

Identify the CORRECT statement.

____________ is used as a catalyst for the following reaction:

\[\ce{CO + \underset{\text{(Steam)}}{H2O} ⇌ CO2 + H2}\]

Which of the following is/are CORRECT?

(I) Acidic character: HF > HCl > HBr

(II) Thermal stability: HF > HCl > HBr

(III) Bond dissociation enthalpy: HF < HCl < HBr

For the preparation of mixed ethers by Williamson synthesis, which of the following combination will give the best yield?

Which of the following statements Is true for carbonyl group?

Identify the symbol used for water according to Dalton's atomic theory?

Zirconium is refined by ____________.

Low reactivity of ketones with respect to aldehydes is due to ____________.

Identify the CORRECT statements from the following.

i. The colour of colloidal dispersion depends on size of colloidal particles.

ii. Tyndall effect is used to distinguish between colloidal dispersion and true solution.

iii. Eosin and congo red are examples of negatively charged sols.

Which of the following methods is used to separate wolframite and stannic oxide present in cassiterite?

Action of hydrogen iodide on anisole gives ______.

Which among the following solids shows Frenkel defect?

Calculate the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume at 27°C? (R = 2 cal K^-1 mol^-1).

Which of the following statements is INCORRECT for Dalton's atomic theory?

Which of the following is/are CORRECT?

(I) Acidic character: H₂S < H₂Se < H₂Te

(II) Thermal stability: H₂S < H₂Se < H₂Te

(III) Reducing property: H₂S > H₂Se > H₂Te

Bassemerisation is used in the extraction of ______.

In the manufacture of ammonia by Haber's process, Al₂O₃ does not act as a catalyst but increases the activity of the catalyst. The role of Al₂O₃ can be best described as ____________.

Arrange the following anions according to the increasing order of their stability.

(I) \[\ce{\underset{Alkoxide anion}{R - O^-}}\]

(II)

Phenoxide anion

(III) \[\begin{array}{cc}
\ce{O}\phantom{..}\\
||\phantom{..}\\
\ce{\underset{Carboxylate anion}{R - C - O^-}}\\
\end{array}\]

The standard emf of a galvanic cell involving cell reaction with n = 1 was found to be 0.592 V at 25°C. The equilibrium constant of the reaction would be ____________.

Which of the following match is CORRECT?

(I) Frenkel defect: Electrical neutrality of the compound is preserved.

(II) Schottky defect: Density of the substance decreases.

(III) Schottky defect: Combination of vacancy defect and interstitial defect.

(IV) Frenkel defect: Small difference between size of cation and anion.