Stoichiometry

Faster rate of drying of moulded refractories results in high ______________ of refractories?

Byadmin March 4, 2019August 24, 2021

Faster rate of drying of moulded refractories results in high ______________ of refractories?

A. Green strength
B. Voids
C. Shrinkage
D. Both B. and C.

Stoichiometry

In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is__________________?

In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is__________________?

A. 180
B. 60.3
C. 720
D. 200

Read More In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is__________________?
Stoichiometry

In a neutral solution _________________?

In a neutral solution _________________?

A. H+ ions are absent
B. OH- ions are absent
C. Both H+ and OH- ions are present in very small but equal concentration
D. None of these

Read More In a neutral solution _________________?
Stoichiometry

A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the ____________________?

A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the ____________________?

A. Atomic weight of the metal is 4
B. Equivalent weight of the metal is 4
C. Atomic weight of the metal is 2
D. Equivalent weight of the metal is 8

Read More A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the ____________________?
Stoichiometry

Isotopes are atoms having the same _____________________?

Isotopes are atoms having the same _____________________?

A. Mass number
B. Number of neutrons
C. Atomic mass
D. None of these

Read More Isotopes are atoms having the same _____________________?
Stoichiometry

At room temperature, the product [H+] [OH-] in a solution is 10-14 moles/litre. If, [OH-] = 10-6 moles/litre, then the pH of the solution will be ________________________?

At room temperature, the product [H+] [OH-] in a solution is 10-14 moles/litre. If, [OH-] = 10-6 moles/litre, then the pH of the solution will be ________________________?

A. 6
B. 8
C. 10
D. 12

Read More At room temperature, the product [H+] [OH-] in a solution is 10-14 moles/litre. If, [OH-] = 10-6 moles/litre, then the pH of the solution will be ________________________?
Stoichiometry

Avogadro’s number is equal to__________________?

Avogadro’s number is equal to__________________?

A. 6.023 × 1023 molecules/kg.mole
B. 6.023 × 1023 molecules/gm.mole
C. 6.023 × 1016 molecules/kg.mole
D. 6.023 × 1026 molecules/gm.mole

Read More Avogadro’s number is equal to__________________?

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