Explanation

The number of atoms present in one molecule of rhombic sulphur (S8) is 8.

Rhombic sulphur is the most stable allotropic form of sulphur 

Explanation

Dipole moment of H2 =0 ( zero ).

The ionic character exists in H2 molecule but no dipole moment or bond moment exists permanently.

In these diatomic molecules, the shared pair of electrons lies between the nucleus of the two bonded atoms.

Hence, no separation of charges occurs. I.e., these molecules have zero dipole moment.

Explanation

The vapour pressure of a liquid varies with its temperature in a directly proportional relationship. 

The other factors that affect vapor pressure are humidity and surface area.

It is independent of surface area and humidity

Additional information:

As the temperature of a liquid increases its vapor pressure also increases.

Conversely, vapor pressure decreases as the temperature decreases.

Thus with a decrease in vapor pressure-temperature will not rise.

On the other hand with a rise in temperature density, surface tension, and viscosity all decrease.

Explanation

Paramagnetism is due to unpaired electrons in the material

At least one unpaired electron spin in a material's atoms or molecules causes paramagnetism. 

To put it in another way, any substance with atoms with partially filled atomic orbitals is paramagnetic.

The unpaired electrons have a magnetic dipole moment due to their spin.

Explanation

Formaldehyde contains:

• one carbon atom
• two hydrogen atoms
• one oxygen atom.

The formaldehyde formula is written CH2O or HCHO,

At room temperature, formaldehyde is a colorless, flammable gas that is a distinct, pungent smell.

It is also known as :

• methanal,
• methylene oxide,
• oxymethylene,
• methyl aldehyde
• oxomethane.

Explanation

The excluded volume is represented by "b"

Concept:

The constant 'b' is the van der Waals constant for correction in volume.

It is also known as the excluded volume or co-volume.

The numerical value of 'b' is found to be four times the actual volume occupied by the gas molecules.

Formula:

Excluded volume or co-volume equals (V−nb) for n moles.

Reason: Co-volume depends on the effective size of gas molecules.

Explanation

A highly interactive and self-disciplined class:

This climate encourages students:

• autonomy and collaboration
• with a focus on active participation 
• self-regulation

It promotes:

• critical thinking
• cooperation
• responsibility

Explanation

The structure of the meta - formaldehyde consists of a ring that has:

• 3 carbon and 3 oxygen bonded with each other.

Some number of molecules of formaldehyde combine to form a ring structure

Metaformaldehyde is a trimer of formaldehyde.

It is also called 1, 3, 5-trioxane, trioxane, or trioxin.

Explanation

Pursue  پیروی کرنا

Avoid گریز کرنا

Explanation

Benzene has a boiling point of 80.09 °C at atmospheric pressure.

Its melting point of 5.53 °C 

Its density is 0.8787 g>cm3 when liquid and 0.899 g>cm3 when solid

it has:

• Tc = 289.01 °C,
• Pc = 48.34 atm,
• Tt = 5.52 °C,
• Pt = 0.0473 atm.