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Chemical Engineering Basics

The emf of a Deniell cell “Zn | Zn2+ || Cu2+ | Cu” can be increased by_________________?

Chemical Engineering Basics /
The emf of a Deniell cell “Zn | Zn2+ || Cu2+ | Cu” can be increased by_________________?

A. Decreasing the surface area of the electrodes
B. Increasing the concentration of zinc sulphate solution
C. Increasing the surface area of the electrodes
D. Increasing the concentration of copper sulphate solution

The emf of a Deniell cell “Zn | Zn2+ || Cu2+ | Cu” can be increased by_________________? Read More »

Chemical Engineering Basics

In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be_______________?

Chemical Engineering Basics /
In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be_______________?

A. ΔQ = 0, ΔS=0
B. ΔQ = 0, ΔS = +ve
C. ΔQ = 0, ΔS = -ve
D. ΔQ = +ve, ΔS= +ve

In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be_______________? Read More »

Chemical Engineering Basics

The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1) ?

Chemical Engineering Basics /
The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1) ?

A. 2300 J
B. 4600 J
C. 230 J
D. 2.3 × 106 J

The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K-1mole-1) ? Read More »

Chemical Engineering Basics

The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for ______________ at room temperature ?

Chemical Engineering Basics /
The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for ______________ at room temperature ?

A. Air
B. Water
C. Mercury
D. Alcohol

The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for ______________ at room temperature ? Read More »

Chemical Engineering Basics

For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the_____________________?

Chemical Engineering Basics /
For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the_____________________?

A. Reynolds number (based on sphere diameter) should be < 1
B. Flow around the sphere should be in turbulent region
C. Sphere must be metallic
D. Fluid density should be constant

For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the_____________________? Read More »

Chemical Engineering Basics