Tag: chemical reactions

Quizzes (8) Questions (144)

Questions Related to chemical reactions

Multiple choice chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

The equivalent conductance at infinite dilution of an acid like HF

  1. Can be determined by extrapolation of measurements of dilute solutions of HCI, HBr and HI

  2. Can be determined by measurement of very dilute HF solution

  3. Can best be determined from measurements of concentrated solutions of NaF, NaCI and HCI

  4. Can best be determined from measurements of dilute solutions of NaF, NaCI and HCI.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The equivalent conductance at infinite dilution of an acid like $HF$ can best be determined from measurement of dilute solution of $NaF,NaCl,HCl$ because these have ionic character.

Multiple choice chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

Consider a $0.1M$ solution of two solutes $A$ and $B$. $A$ behaves as a non-electrolyte while $80\%$ of $B$ dimerises. Which of the following statement is correct regarding these solutions?

  1. The b.pt of $A$ will be less than $B$
  2. The osomotic pressure of $B$ will be more than thatof $A$
  3. The freezing point of solution $A$ will be less than that of $B$

  4. Boiling points of both solutions will be same.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Correct option (b) The osmotic pressure of B will be more than that of A 

 Explanation: The concentration of electrolyte, which ionises in water shall be more although 80% of it dimerises 

Multiple choice chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

In which of the following electrolysis, the composition of electrolyte is expected to remain constant under optimum conditions:

  1. Aq. AgNO$ _{3}$ solution between Ag electrodes
  2. Aq. CuSO$ _{4}$ solution between Pt electrodes

  3. Fused NaCl between Pt electrodes
  4. Aqueous AgNO$ _{3}$ solution between Pt electrodes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In case of Aq.  $AgNO _3$  with Ag electrodes, metal from anode goes to the solution and metal from solution goes to the cathode, hence the composition of electrolyte does not change with time and remain constant.

Hence. option A is correct.

Multiple choice chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

Which of the following will form the cathode with respect to iron anond in an electrolytic cell ?

  1. Mg

  2. Al

  3. Cu

  4. Zn
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In an electrochemical cell, the metal with a higher reduction potential (more noble) acts as the cathode, while the metal with a lower reduction potential (more active) acts as the anode. Copper (Cu) has a higher reduction potential than iron (Fe).

Multiple choice chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

Which of the following is not an electrolyte?

  1. Sulphuric acid

  2. Lemon juice

  3. Tamarind juice

  4. Detergent solution
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent. Sulphuric acid, lemon juice, and tamarind juice contain ions that conduct electricity, whereas a detergent solution is generally considered a non-electrolyte or a very weak one in this context.

Multiple choice chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

The term used for a liquid or solution, which conducts electricity with accompanying chemical change are :

  1. electrolytes

  2. electrodes

  3. anodes

  4. cathodes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An electrolyte is a substance that ionizes when dissolved in suitable ionizing solvents such as water. This includes most soluble salts, acids, and bases.

Multiple choice chemistry electrolysis electrolytes and non-electrolytes introduction to electrolysis chemical reactions

Choose the correct option which is a non-electrolyte liquid.

  1. Water

  2. Salt solution

  3. Glucose

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Electrolytes are salts or molecules that ionize completely in solution. As a result, electrolyte solutions readily conduct electricity.
Nonelectrolytes are compounds that do not ionize at all in solution. As a result, solutions containing nonelectrolytes will not conduct electricity. Typically, non-electrolytes are primarily held together by covalent rather than ionic bonds. A common example of a nonelectrolyte is glucose