The chemical nature of an element is independent of_______________________?

Byadmin March 12, 2019August 30, 2021

The chemical nature of an element is independent of_______________________?

A. Its atomic number
B. The number of protons or electrons present in it
C. The number of neutrons present in it
D. None of these

Stoichiometry

1 torr is equal to ______________ mm Hg column?

1 torr is equal to ______________ mm Hg column?

A. 1
B. 0.1
C. 10
D. 1000

Read More 1 torr is equal to ______________ mm Hg column?
Stoichiometry

What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20) ?

What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20) ?

A. AB3
B. A2B3
C. A2B
D. AB2

Read More What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20) ?
Stoichiometry

Isotonic solutions must have the same__________________?

Isotonic solutions must have the same__________________?

A. Viscosity
B. Molar concentration
C. Normality
D. Critical temperature

Read More Isotonic solutions must have the same__________________?
Stoichiometry

Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to__________________?

Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to__________________?

A. Thermal spalling
B. Slag attack
C. Fusion under load
D. CO attack

Read More Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to__________________?
Stoichiometry

The latent heat of vaporisation__________________?

The latent heat of vaporisation__________________?

A. Decreases with increased temperature
B. Decreases as pressure increases
C. Becomes zero at the critical point
D. All A., B. & C.

Read More The latent heat of vaporisation__________________?
Stoichiometry

A car tyre of volume 0.057 m3 is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and Cv for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is__________________?

A car tyre of volume 0.057 m3 is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and Cv for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is__________________?

A. 380
B. 630
C. 760
D. 880

Read More A car tyre of volume 0.057 m3 is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and Cv for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is__________________?

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