Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature

(c) When object is placed between the focus and centre of curvature

A = {x: x is a natural number} = {1, 2, 3, 4, 5 …}  B ={x: x is an even natural number} = {2, 4, 6, 8 …}  C = {x:...

Critical temperature.

The correct conditions is q = 0. So option (iii) is correct.

It’s freezing point will be below 0°C due to the presence of a non-volatile impurity in it

The conditions required for combustion to take place are:  → Presence of a fuel  → Air (or oxygen)  → Ignition temperature (minimum temperature at which a substance catches fire).

Seema will have to apply larger force since she will experience more frictional force because heavy object will be pressed hard against the opposite surface and produces more friction.

Substances that are stronger oxidising agents than ferrous ions can oxidise ferrous ions. Fe2+ → Fe3+ + e-1  ;   Eø =  - 0.77 V This implies that the substances having higher reduction potentials than +0.77 V can...

(c) may have a unit, Explanation: Dimensionless quantities may have units.

(b) Let Seema’s present age be x years.  Then, Seema’s son’s present age = x/4 years  Seema’s father’s present age = 7x/4 years.  Then, x+ x/4 +7x/4= 32x3  12x = 96 × 4  x = 96...