NTA JEE Main 31st August 2021 Shift 1

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason (R): It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements, choose the most appropriate answer from the options given below:

Which one of the following is the correct PV vs P plot at constant temperature for an ideal gas? (P and V stand for pressure and volume of the gas respectively)

Monomer of Novolac is:

The major component/ingredient of Portland Cement is:

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason.
Assertion (A): A simple distillation can be used to separate a mixture of propanol and propanone.
Reason (R): Two liquids with a difference of more than 20°C in their boiling points can be separated by simple distillations.
In the light of the above statements, choose the most appropriate answer from the options given below:

Choose the correct name for compound given below:

BOD values (in ppm) for clean water (A) and polluted water (B) are expected respectively as:

Which one of the following 0.10 M aqueous solutions will exhibit the largest freezing point depression?

Select the graph that correctly describes the adsorption isotherms at two temperatures $$T_1$$ and $$T_2$$ ($$T_1 > T_2$$) for a gas:
($$x$$ - mass of the gas adsorbed, $$m$$ - mass of adsorbent, $$P$$ - pressure)

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Treatment of bromine water with propene yields 1-bromopropan-2-ol.
Reason (R): Attack of water on bromonium ion follows Markovnikov rule and results in 1-bromopropan-2-ol.
In the light of the above statements, choose the most appropriate answer from the options given below: