Chemistry

For a reaction involving only gases at 25?C the equilibrium constant can be expressed in terms of molarity Ke or partial pressure Kp. Which is true about the numerical value of Kp ?

Options:

• A. Kc is generally greaer than Kp
• B. Kc is generally less than Kp
• C. Kc is generally equal to Kp
• D. Kc is equal to Kp if the total moles of reactants and products are equal

View Answer

D. Kc is equal to Kp if the total moles of reactants and products are equal

Solution having the property of a very little change in pH on adding a small amount of strong acid or base is called________________?

Options:

• A. buffer solution
• B. normal solution
• C. standard solution
• D. neutral solution

View Answer

A. buffer solution

Hypochlorous acid is used for disinfecting the water it reacts with the dissolved ammonia producing___________________?

Options:

• A. NH2Cl
• B. NHCI2
• C. NCI2
• D. all of the above

View Answer

D. all of the above

Which of the following is not a secondary pollutant_________________?

Options:

• A. ozone
• B. carbonic acid
• C. sulphuric acid
• D. carbon dioxide

View Answer

D. carbon dioxide

In partially miscible liquids the two layers are___________________?

Options:

• A. saturated solutions of each liquid
• B. unsaturated solutions of each liquid
• C. normal solution of each liquid
• D. no layer formation takes place

View Answer

A. saturated solutions of each liquid

10ml of alcohol dissolve in 90ml of water unit of concentration used is________________?

Options:

• A. % w/w
• B. % w/v
• C. % v/v
• D. % v/w

View Answer

C. % v/v

Sintered crucible is made up of________________?

Options:

• A. Plastic
• B. glass
• C. porcetain
• D. fiber

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B. glass

The technique used to separate components of mixture in solid phase ?

Options:

• A. Crystallization
• B. Filtration
• C. Sublimation
• D. Solvent extraction

View Answer

C. Sublimation

Which of the following is the best explanation that CO2 is non polar molecule __________________?

Options:

• A. Linear geometry
• B. Dipole moment is zero
• C. Sp hybridization
• D. None

View Answer

B. Dipole moment is zero

Pi bonds are produced by overlapping of__________________?

Options:

• A. Un-hybrid orbitals
• B. Hybrid orbitals
• C. Hybrid and un hybrid orbitals
• D. atomic orbital and hybrid orbital

View Answer

A. Un-hybrid orbitals