CH 3 : Basic Introduction To Solution, pH Value and Volumetric Analysis
Multiple Choice Questions
1.The substance that dissolves in a substance to produce a homogeneous mixture is called
a) Solvent
b) Solute
c) Solution
d) Colloid
2.For a solution to be neutral, what should be the value of hydrogen Ion concentration in it?
a) (1 x 10)^(-14) gms ion/m
b) (1 x 10)^(-7) gms ion/ml
c) (1 x 10)^(-14) gms ion/litre
d) (1 x 10)^(-7) gms ion/litre
3.If a solution has a pH value of 12, then which of the following condition is true:
a) [H+] < [OH-]
b) [H+] > [OH-]
c) [H+] = [OH-]
d) None of the above
4.The value of pH of 0.01 N HCl Solution is
a) 1 b) 2 c) 3 d) 4
5.Which statement is correct regarding Buffer Solution?
a) It is a solution whose pH change when small amount of an acid or base is added in it.
b) It is a solution whose pH does not change when small amount of an acid or base is added in it.
c) It does not use pH value as constant in wide variety of chemical applications.
d) The solution of methanoic acid is an example of effective buffer solution.
6.A drop of HCl is added to a mixed solution of sodium acetate and acetic acid, Its pH value will
a) increase
b) decrease
c) remain same
d) increase and then decrease
7.Three unknown solutions are given with pH value of 6, 8 & 9.5 respectively. Which solution will contain the maximum OH– ion
a) Solution sample-1
b) Solution sample-2
c) Solution sample-3
d) Data is insufficient
8.When a base is being added to an acid gradually, it is observed that the value of pH suddenly changes from 3 to 11 near the neutralization point. The titration type is:
a) Weak Acid and Weak Base
b) Weak Acid and Strong Base
c)Strong Acid and Weak Base
d) Strong Acid and Strong Base
9.The value of pH of 0.001 N KOH Solution is
a) 2 b) 3 c) 11 d) 12
10.Which of the following mixture is a buffer solution?
a) Hydrochloric Acid and Sodium Hydroxide
b) Hydrochloric Acid and Sodium Chloride
c) Sodium Hydoxide and Ammonium Sulphate
d) Sodium Hydoxide and Ammonium Bi-carbonate
11.The most suitable indicator in the titration of Sodium Carbonate and HCl is
a) Methyl Orange
b) Phenolopthalein
c) Red Litmus
d) Blue Litmus
12.What is the type of reaction involved in acid-alkali titration?
a) Precipitation
b) Decomposition
c) Combustion
d) Neutralization
13.Which of the below titration correctly depicts this graph?
a) NaOH and HCl
b) NH4OH and HCl
c) NaOH and H2C2O4
d) NH4OH and H2C2O4
14.What is the nature of the solution obtained by the reaction between a strong base and weak acid
a) Amphotric
b) Acidic
c) Neutral
d) Basic
15.What is the volume of concentrated HCl required to prepare 250 ml 5 N HCl solution? (Normality of concentrated HCl = 12)
a) 8 mL
b) 10.42 mL
c) 104.2 mL
d) 1.042 mL
16.What is the method used to determine the strength of a given solution?
a) Qualitative Analysis
b) Chromatography
c) Volumetric Analysis
d) Gravimetric Analysis
17.Which of the following statement(s) is/are correct regarding pH Scale?
a) It is the negative logarithm of H+ ion concentration of a given solution.
b) It is the positive logarithm of H+ ion concentration of a given solution.
c)It is a 14 point scale
d) The sum of pH and pOH of a solution is always less than 14
18.What is the equivalent weight of H2SO4?
a) 98
b) 49
c) 50
c) 76
19.In a titration between KMnO4 and H2C2O4, which acts as the reducing agent?
a) KMnO4
b) H2C2O4
c) None of these
20.What is the Normality of Phosphoric acid (H3PO4) dissolved in 750 mL water. (Weight of H3PO4 = 1.5 gms)
a) 6.1
b) 0.61
c) 0.061
d) 0.0061
Answers
Explanation:
In quantum mechanics, the uncertainty principle (also known as Heisenberg's uncertainty principle) is any of a variety of mathematical inequalities[1] asserting a fundamental limit to the accuracy with which the values for certain pairs of physical quantities of a particle, such as position, x, and momentum, p, can be predicted from initial conditions.
Such variable pairs are known as complementary variables or canonically conjugate variables; and, depending on interpretation, the uncertainty principle limits to what extent such conjugate properties maintain their approximate meaning, as the mathematical framework of quantum physics does not support the notion of simultaneously well-defined conjugate properties expressed by a single value. The uncertainty principle implies that it is in general not possible to predict the value of a quantity with arbitrary certainty, even if all initial conditions are specified.
Introduced first in 1927 by the German physi