phase difference good videos

 https://www.youtube.com/watch?v=REy7hoozFRQ

https://www.youtube.com/watch?v=PUma5kAH_AA

https://www.youtube.com/watch?v=sFuMOB2hBRg

https://www.youtube.com/watch?v=REy7hoozFRQ

https://www.youtube.com/watch?v=j1ULNWZ3Xh4

https://www.youtube.com/watch?v=MT-h_UFX5WA


https://www.youtube.com/watch?v=ToBL_xNS02w


https://www.youtube.com/watch?v=AEttkWf08BA

https://www.youtube.com/watch?v=E-YuWTbYMU4

https://www.youtube.com/watch?v=iIjPJERQnnw

https://www.youtube.com/watch?v=h28MWRrpOUU


https://www.youtube.com/watch?v=v_oujF9RHK8

 ICSE | CLASS 10 CHEMISTRY | CHAPTER 5 ELECTROLYSIS | MCQs | Semester 1 || 2021

 

ICSE | CLASS 10 CHEMISTRY | CHAPTER 5 ELECTROLYSIS | MCQs | Semester 1 || 2021


1 Electrolysis is the passage _____ of liquid or a solution accompanied by a______ change.
2 A weak electrolyte is one which (a) dissociates completely (b) is feebly ionised in the solution (c) ionises completely (d) is having high electrical conductivity
3. A strong electrolyte is one which (a) is completely ionised in the solution (b) dissociates partially in solution (c) is having low electrical conductivity (d) Ionises partially
4. Sodium chloride is(a) strong electrolyte (b (c) non-electrolyte (d) weak electrolyte ) None of these
5. Water is (a) strong electrolyte (c) weak electrolyte (b) non-electrolyte (d) None of these
6. Pure water consists almost entirely of (a) ions (b) atoms(c) ions and molecules (d) molecules
7. In the electrolysis of acidulated water, oxygen is produced by the discharge of...............ions at the anode.
8. The gas given off at cathode during the electrolysis of acidulated water is................
9. With platinum electrodes, hydrogen is liberated at the ............ and oxygen at the............ during the electrolysis of acidified water.
10. The electrode where the current enters the electrolyte is called the...........
11. During electrolysis, anions undergo_______at the _______


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 ICSE | CLASS 10 CHEMISTRY | CHAPTER 2 CHEMICAL BONDING| MCQs | Semester 1 || 2021 1.

 

1. A reducing agent is a substance which can (a) Accept electron (b) Donate electrons (c) Accept protons (d) Donate protons 

2. In NH^+4 all the four bonds are..... 

3. Among the following compounds identify the compound that has all three bonds (ionic, covalent and coordinate bond) (a) Ammonia (b) Ammonium chloride (C) Sodium hydroxide (d) Calcium chloride 

4. Due to the presence of strong electrostatic forces of attraction between ions, ionic compounds. (a) Have high melting and boiling points (b) Conduct electricity in solid state (C) Dissolve in kerosene (d) All of the above 

5. Ionic bond is present in which of the following species:(b) CHC13 (C) NaBr (d) CCl4 (a) O2 

6. The type of bonding in HCl molecule is: (a) Polar covalent bond (b) Pure covalent (C) Non-polar(d) Hydrogen bonding 

7. A polar covalent bond will be formed in which one of these pair of atoms:b) H2 (C) Cl2 (d) 02 (a) HF 

8. Which of the following is a common characteristic of a covalent compound ? (a) high melting point (b) consists of molecules (c) always soluble in water (d) conducts electricity when it is in the molten state 

9. Elements which gains electrons is known as: (a) Electropositive elements (b) Electronegative elements 

10. Capacity of an atom to attract the shared pair of electron to itself is called...... 

 

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 OXIDATION NUMBERS - PRACTICE PROBLEMS

 

  Calculate the oxidation number of underlined atoms. a. H2SO4 b. HNO3 c. H3PO3 d. K2C2O4

e. H2S4O6 f. Cr2O7(-2) g. NaH2PO4

Maharashtra Board Chapter 6 Class 11 Redox Reactions

 OXIDATION NUMBERS | SOLVED EXAMPLES

 

 

 Derivation of  Time period  T=2π√(l/g) of Simple Pendulum | What is Seconds Pendulum

 

In this lecture we deal with 

Derivation of T=2π√l/g

 finding acceleration due to gravity(g) using T=2π√l/g

why sinθ=θ for small angles

assumptions for derivation of simple pendulum formula

laws of Simple Pendulum

what is a Seconds Pendulum 

 

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