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.

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.

Solution:

Explanation:

The differences between atomic mass and mass number are given as

Final answer:

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

Solution:

Explanation:

The sketch of Bohr’s model is 

Final Answer:

The sketch of Bohr’s Model 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.