Questions

K is degree kelvin

Zero K corresponds to -273  K = C + 273

The freezing point of water being 0 C, on the kelvin scale it is 0 C + 273 K

Repetitive Strain Injury

Catfish

The main parties involved in the IR system are: 

i.) Employers – They are the ones who possess the rights to hire the employees and remove them. They also possess the rights to relocate, close or merge the business. They can opt for technological changes as and when they see it in the interest of business. 

ii.) Employees – They are actually the ones who keep the business moving. They possess the rights to voice their opinions and feelings while striving for betterment. They usually form the unions to negotiate with the employers.

iii.) Government – Government is the one who influences the IR system with laws, rules, agreements, awards of court etc. They also include third parties & labour and tribunal courts to manage the IR system.

   1) SO2                  2) CH2Cl2                3) PCl3

How to check the given molecules are polar or non polar :

If the electronegativity of the two bonded atoms are different then the bond is polar. Although, some molecules contain polar bonds, the molecule may be non-polar. If the polarity of all the bonds present in the molecule are cancel each other then molecule is non-polar.

In the given options,

SO2  is polar because the dipole moments on the O do not cancel.

PCl3  is polar because the P-Cl bonds do not cancel out.

CH2Cl2  polar because the C-Cl bonds do not cancel.

Hence, in brief, Polar molecules are molecules with net dipole due to the presence of partial positive and partial negative charge.

For example, water is a polar molecule that has partial positive and partial negative charge on it. CO2 is a non polar compound.

Therefore, all the given options SO2, CH2Cl2 and PCl3 are Polar molecules.