Electrolytes and non-electrolytes - class-X
electrolytes and non-electrolytes
Questions
An electrolyte:
- has positive charge
- has negative chargec
- should be able to conduct charge without dissociating
- should able to form positive and negative ions
Which of the following is an electrolyte?
- $AgNO _3$ solution
- Alcohol
- Mercury
- Sugar solution
Which of the following is not a non electrolyte?
- Acetic acid
- Glucose
- Ethanol
- Urea
Define good conductors of electricity.
- Compounds which do not break up from their solution on passing electric current
- Materials which do not allow electric current to pass through them easily
- Substances which allow electric current to pass through them easily
- Compounds which break up from their solution on passing electric current
Saturated solution of $KNO _3$ with agar-agar is used to make salt bridge because :
- size of $K^+$ is greater than that of $NO _3^-$
- velocity of $NO _3^-$ is greater than that of $K^+$
- Velocities of both $K^+$ and $NO _3^-$ are nearly the same
- both velocity and sizes of $K^+$ and $NO _3^-$ ions are same
Weak electrolyte is:
- $(NH _4) _2C _2O _4$
- $(NH _4) _2SO _4$
- A and B both
- None
At $90^oC$, $pH$ of an aq. solution of a strong electrolyte is 7. What is the nature of electrolyte?
- Neutral
- Basic
- Acidic
- Cannot say
Maximum number of moles of oxygen gas that can be obtained by the electrolytic decomposition of 90 g of water will be
- 1
- 2.5
- 5
- 9
Which compounds dissociate to ions, when they dissolved in water?
- $BaSO _4; C _2H _4, AgCl$
- $KOH; C _6H _6; H _2SO _4$
- $Ca _3(PO _4) _2AgI; Cu(NO _3) _2$
- $AlCl _3; KOH; O _2$
- $KOH; H _2SO _4; KMnO _4$
The aqueous solution of non-electrolytes contains :
- atoms
- ions
- electrons
- molecules
Which of the following is not a strong electrolytes ?
- $NaCl$
- $KNO _3$
- $NH _4OH$
- $FeSO _4$
A non-electronic conductor is :
- Iron
- Gas carbon
- Copper sulphate
- Mercury
In 0.5 M ${ NH } _{ 3 }$ solution the pH is 11.21 and the per cent dissociation of ammonia in a solution that is 0.15 M ${ NH } _{ 3 }$ and 0.45 M ${ NH } _{ 4 }Cl$ is
- 68%
- 36%
- $4\times { 10 }^{ -3 }%$
- $4\times { 10 }^{ -5 }%$
The equivalent conductance at infinite dilution of an acid like HF
- Can be determined by extrapolation of measurements of dilute solutions of HCI, HBr and HI
- Can be determined by measurement of very dilute HF solution
- Can best be determined from measurements of concentrated solutions of NaF, NaCI and HCI
- Can best be determined from measurements of dilute solutions of NaF, NaCI and HCI.
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?
- The b.pt of $A$ will be less than $B$
- The osomotic pressure of $B$ will be more than thatof $A$
- The freezing point of solution $A$ will be less than that of $B$
- Boiling points of both solutions will be same.
In which of the following electrolysis, the composition of electrolyte is expected to remain constant under optimum conditions:
- Aq. AgNO$ _{3}$ solution between Ag electrodes
- Aq. CuSO$ _{4}$ solution between Pt electrodes
- Fused NaCl between Pt electrodes
- Aqueous AgNO$ _{3}$ solution between Pt electrodes
Which of the following will form the cathode with respect to iron anond in an electrolytic cell ?
- Mg
- Al
- Cu
- Zn
For a dilute solution of a strong electrolyte, which of the following facts is correct ?
- The graph b/w $ \lambda m $ and $C$ is linear
- The graph b/w log $ \lambda m $ and $C$ is linear
- The graph b/w $ \lambda m $ and $ \sqrt {C} $ is linear
- The graph b/w $ \lambda m $ and $ \sqrt {C} $ has a negative slope.
Which of the following is not an electrolyte?
- Sulphuric acid
- Lemon juice
- Tamarind juice
- Detergent solution
The term used for a liquid or solution, which conducts electricity with accompanying chemical change are :
- electrolytes
- electrodes
- anodes
- cathodes
Choose the correct option which is a non-electrolyte liquid.
- Water
- Salt solution
- Glucose
- All of the above
Organic compounds which are non-electrolytes is :
- glucose
- urea
- alcohol
- all of the above
A sugar solution with sugar molecules and water molecules is:
- weak electrolyte
- non electrolyte
- metallic conductor
- strong electrolyte
What kind of particles will be found in a liquid compound which is a non-electrolyte?
- Molecules
- Ionic
- Metallic
- None of the above
State which of these will act as a non-electrolyte :
- Liquid carbon tetrachloride
- Acetic acid
- Sodium hydroxide aqueous solution acid
- Potassium chloride aqueous solution.
An electrolyte is a substance which?
- Conducts electricity
- Decomposes on heating
- Is acidic in nature
- When dissolved in water, dissociates into ions
Which one from the following is always ionic in nature?
- Proteins
- Nucleic acids
- Electrolytes
- Lipids
- Carbohydrates
An electrochemical cell converts __________ energy to ____________ energy.
- Chemical
- Increases
- Electrical
- Ions
Assertion: Benzene is a good electrolyte.
Reason: A good electrolyte has charged ions that carry the electric current.
-
<p>Both Assertion and Reason are true and Reason is the correct explanation of Assertion</p> -
<p>Both Assertion and Reason are true but Reason is not the correct explanation of Assertion</p> -
<p>Assertion is true but Reason is false</p> -
<p>Assertion is false but Reason is true</p> -
<p>Both Assertion and Reason are false</p>
Assertion : In water, a nonelectrolyte does not ionize.
Reason : The ionic solution does not conduct electricity.
- Both Assertion and Reason are true and Reason is the correct explanation of Assertion
- Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- Assertion is true but Reason is false
- Assertion is false but Reason is true
- Both Assertion and Reason are false
What would happen if the electrodes were put in a saturated solution of glucose which is dissolved in water?
- Light bulb would glow
- Light bulb would remain dark
- Apparatus would combust
- Glucose molecules would dissociate
- None of the above
Which of the following can be classified as a strong electrolyte?
- $\displaystyle { Br } _{ 2 }$
- $\displaystyle { C } _{ 6 }{ H } _{ 12 }{ O } _{ 6 }$
- $\displaystyle Ca{ Cl } _{ 2 }$
- $\displaystyle { H } _{ 2 }O$
- $\displaystyle N{ O } _{ 3 }$
What is an electrolyte?
- Electrolytes are substances that dissolve by separating into ions in solution.
- Electrolytes are substances that do not conduct electricity but dissolve in water.
- Electrolytes are substances that have covalent bonds.
- Electrolytes are substances that share electrons.
Two solutions of X and Y electrolytes are taken in two beakers and diluted by adding $500$ mL of water. $\Lambda _m$ of X increases by $1.5$ times while that of Y increases by $20$ times, what could be the electrolytes X and Y?
- $X\rightarrow NaCl, Y\rightarrow KCl$
- $X\rightarrow NaCl, Y\rightarrow CH _3COOH$
- $X\rightarrow KOH, Y\rightarrow NaOH$
- $X\rightarrow CH _3COOH, Y\rightarrow NaCl$
The substances whose aqueous solutions conduct electricity are called :
- electrolytes
- non-electrolytes
- conductors
- metals