Chemistry Mcqs Archives | Page 87 of 125

Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ?

July 9, 2022March 17, 2019 by admin

Which set of solutes will form a buffer when dissolved in water to make 1 litter of solution ?

A. 0.0002M HCI
B. 0.2 mole of NaCI with 0.2 mole of HNO3
C. 0.4 mole of CH3COOH with 0.4 mole of NaOH
D. 0.4 mole of NH3 with 0.2 mole of HCI

July 9, 2022March 17, 2019 by admin

Which of following is not a base______________?

A. KOH
B. NH3
C. PH3
D. BF3

July 9, 2022March 17, 2019 by admin

In which of the following equilibria will Kc and Kp have the same value ?

A. PCI5 = PCI3 + Cl2
B. N2 + 3H2 = 2NH
C. 2CO + O2 = CO2
D. N2 + O2 = 2NO

July 9, 2022March 17, 2019 by admin

Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH ?

A. 0
B. 1
C. 2
D. any one

July 9, 2022March 17, 2019 by admin

Kc value has_______________?

A. No units
B. Units
C. Both A & B
D. None

July 9, 2022March 17, 2019 by admin

Conjugated base of a weak acid is_________________?

A. weak
B. strong
C. moderately weak
D. unstable

July 9, 2022March 17, 2019 by admin

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

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

July 9, 2022March 17, 2019 by admin

Which one of the following is a buffer solution ?

A. brine
B. blood
C. glue
D. solution of CuSO4

July 9, 2022March 17, 2019 by admin

Equilibrium state is achieved quickly by the addition of ________________?

A. reactants
B. acid
C. base
D. catalyst

July 9, 2022March 17, 2019 by admin

By decreasing the pressure the reaction will go to that direction where_________________?

A. volume is decreased
B. volume increased
C. heat absorbed
D. no. of moles of specie decreased