This pdf includes grade 12 maths ;it would help you to understand it easily

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Here's a list of common words along with their more advanced synonyms:

Begin: Commence
End: Conclude
Smart: Intelligent
Happy: Content
Sad: Melancholy
Big: Enormous
Small: Minute
Tired: Fatigued
Pretty: Beautiful
Ugly: Unattractive
Rich: Affluent
Poor: Impoverished
Angry: Irate
Calm: Serene
Fast: Swift
Slow: Languid
Hard: Difficult
Easy: Simple
Funny: Hilarious
Serious: Solemn
Old: Ancient
New: Novel
Loud: Vociferous
Quiet: Hushed
Difficult: Challenging
Friendly: Amiable
Enemy: Adversary
Beautiful: Exquisite
Scared: Terrified
Courageous: Valiant
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Chemistry multiple-choice questions on electrolysis along with their answers:

1. What is the primary purpose of electrolysis?

• A) To generate heat

• B) To decompose a compound using electricity

• C) To mix different substances

• D) To produce light

Answer: B) To decompose a compound using electricity

2. In electrolysis, the anode is the electrode where:

• A) Reduction occurs

• B) Oxidation occurs

• C) No reaction takes place

• D) Electrons are gained

Answer: B) Oxidation occurs

3. Which of the following statements is true regarding electrolytes?

• A) They are always solid at room temperature.

• B) They do not conduct electricity in solution.

• C) They dissociate into ions when dissolved in water.

• D) They are always acidic.

Answer: C) They dissociate into ions when dissolved in water.

4. During the electrolysis of aqueous sodium chloride (NaCl), which gas is produced at the anode?

• A) Hydrogen

• B) Oxygen

• C) Chlorine

• D) Nitrogen

Answer: C) Chlorine

5. What is the effect of increasing the concentration of the electrolyte on the rate of electrolysis?

• A) It decreases the rate of electrolysis.

• B) It has no effect on the rate.

• C) It increases the rate of electrolysis.

• D) It stops the reaction completely.

Answer: C) It increases the rate of electrolysis.

6. In the electrolysis of copper(II) sulfate solution with copper electrodes, what happens at the cathode?

• A) Copper ions are oxidized to copper metal.

• B) Copper metal is deposited from the solution.

• C) Oxygen gas is evolved.

• D) No reaction occurs.

Answer: B) Copper metal is deposited from the solution.

7. Which of the following factors does NOT influence the products of electrolysis?

• A) Type of electrolyte

• B) Nature of the electrodes

• C) Temperature of the electrolyte

• D) Size of the container

Answer: D) Size of the container

8. What is produced at the cathode during the electrolysis of dilute sulfuric acid (H₂SO₄)?

• A) Hydrogen gas

• B) Oxygen gas

• C) Sulfur dioxide

• D) Water

Answer: A) Hydrogen gas

9. In electrolysis, Faraday's laws relate to:

• A) The temperature and pressure of the reaction.

• B) The amount of substance produced at an electrode to the quantity of electricity passed through the electrolyte.

• C) The color changes during the reaction.

• D) The physical state of reactants.

Answer: B) The amount of substance produced at an electrode to the quantity of electricity passed through the electrolyte.

10. Which of the following is a common application of electrolysis?

• A) Electroplating

• B) Combustion engines

• C) Distillation

• D) Filtration

Answer: A) Electroplating

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How much of the following questions will you get right?
Put your scores in the comments below.



1. Which of the following physical quantities is not a base quantity in the SI system?
a) Mass
b) Time
c) Temperature
d) Speed


2. Which of the following has units of Kgm²/s² ?
a) Force
b) Energy
c) Power
d) Momentum

3. Which of the following pairs consists only of extensive properties?
a) Density and volume
b) Volume and mass
c) Temperature and pressure
d) Pressure and volume


4. The SI unit of pressure is derived as:
a) Kg/ms²
b) Kg/ms
c) Kg/m²s²
d) Kgm²/s³



5. Which physical quantity is intensive and has SI units of N/m² ?
a) Force
b) Pressure
c) Energy
d) Power


6. Which of these is a correct match between quantity and SI unit?
a) Work — joule
b) Force — watt
c) Power — newton
d) Energy — pascal



7. If a vector quantity has zero magnitude, its direction is:
a) Undefined
b) Along the x-axis
c) Along the y-axis
d) Towards the origin



8. Which of the following has the same unit as impulse?
a) Work
b) Energy
c) Momentum
d) Power


9. If 1 km = 1000 m, how many cm are there in 2.5 km?
a) 2.5×10⁴
b) 2.5×10⁵
c) 2.5×10⁶
d) 2.5×10³


10. Which quantity is dimensionless?
a) Force
b) Pressure
c) Refractive index
d) Work




Answer key


1. d) Speed
2. b) Energy
3. b) Volume and mass
4. c)
5. b) Pressure
6. a) Work — joule
7. a) Undefined
8. c) Momentum
9. b)
10. c) Refractive index
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