Question of Exercise 3

Ionic And Chemical Equilibrium of Class 11

Question
Which one is strongest electrolyte in the following

Answer

Option 1

Option 2

Option 3

Option 4

Frequently Asked Questions

Oxidation involves

A: Loss of electrons

B: Gain of electrons

C: Increase in the valency of negative part

D: Decrease in the valency of positive part

 

Solution:

Explanation: 

  • Oxidation is the process in which there is an increase in oxidation number of the central atom of a compound or element . 
  • It involves gain of oxygen or loss of electrons.

Final answer: 

Hence, correct option is A, i.e. loss of electrons.

Gram molecular mass of CH3OH is

A: 28g

B: 16g

C: 32g

D: 62g

Solution:

Explanation:

Gram molecular mass(G.M.M) is mass in grams of one mole of molecule of any substance. 

So, the Gram molecular mass of methanol is

(CH3OH) =Mass of carbon+4× Mass of hydrogen+Mass of oxygen

=12 gm+4(1)gm+16gm

=32gm

 Final answer: 

Hence, the correct option is C, i.e. 32g.

 

 

What is the difference between atomic mass and mass number

 

 

Solution:

Explanation:

The differences between atomic mass and mass number are given as

Atomic mass

Mass number

The average number of protons and neutrons in all natural isotopes of an element is its atomic mass.

The sum of protons and neutrons in an atom is the mass number.

It can have a fractional value.

It will never be in fraction.

Final answer:

Hence, the differences between atomic mass and mass number are given below.

Atomic mass

Mass number

The average number of protons and neutrons in all natural isotopes of an element is its atomic mass.

The sum of protons and neutrons in an atom is the mass number.

It can have a fractional value.

It will never be in fraction.

 

Draw a sketch of Bohrs model of an atom with four shells

Solution:

Explanation:

The sketch of Bohr’s model is 

shells

Final Answer:

The sketch of Bohr’s Model is :

shells

 

The charge on a proton is

A: -1.602×10-19C

B: 1.602×10-19C

C: 0

D: None of the above

 

 

Solution:

Explanation:

Protons are the positively charged particles that make up a hydrogen atom's nucleus. A proton has a mass of 1.6726219×10-27 kilograms.

A proton's mass is the same as that of a hydrogen atom. One electron and one proton make up a hydrogen atom. Because the mass of an electron is deemed unimportant, the mass of a hydrogen atom can be said to be equal to the mass of a proton. A proton has a mass of 1840 times that of an electron.

A proton's charge is the same as and opposite that of an electron. As a result, it has a single positive charge having the value 1.602×10-19C.

Final answer:

Option B is the correct answer, The charge on a proton is 1.602×10-19C.

 

 

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