NTA JEE Main 26th July 2022 Shift 2

Hemoglobin contains $$0.34\%$$ of iron by mass. The number of Fe atoms in $$3.3 \text{ g}$$ of hemoglobin is (Given: Atomic mass of Fe is $$56u$$, $$N_A = 6.022 \times 10^{23} \text{ mol}^{-1}$$)

The metal that has very low melting point and its periodic position is closer to a metalloid is

Arrange the following in increasing order of their covalent character.
(A) $$CaF_2$$
(B) $$CaCl_2$$
(C) $$CaBr_2$$
(D) $$CaI_2$$
Choose the correct answer from the options given below.

Class XII students were asked to prepare one litre of buffer solution of pH $$8.26$$ by their chemistry teacher. The amount of ammonium chloride to be dissolved by the student in $$0.2M$$ ammonia solution to make one litre of the buffer is (Given $$pK_b(NH_3) = 4.74$$; Molar mass of $$NH_3 = 17 \text{ g mol}^{-1}$$. Molar mass of $$NH_4Cl = 53.5 \text{ g mol}^{-1}$$)

Given below are two statements:one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Phenolphthalein is a pH dependent indicator, remains colourless in acidic solution and gives pink colour in basic medium.
Reason R: Phenolphthalein is a weak acid. It doesn't dissociate in basic medium.
In the light of the above statements, choose the most appropriate answer from the options given below

Given below are two statements:one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: LiF is sparingly soluble in water.
Reason R: The ionic radius of $$Li^+$$ ion is smallest among its group members, hence has least hydration enthalpy.
In the light of the above statements, choose the most appropriate answer from the options given below.

Given below are two statements:one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Boric acid is a weak acid.
Reason R: Boric acid is not able to release $$H^+$$ ion on its own. It receives $$OH^-$$ ion from water and releases $$H^+$$ ion.
In the light of the above statements, choose the most appropriate answer from the options given below.

The correct decreasing order of priority of functional groups in naming an organic compound as per IUPAC system of nomenclature is

Which of the following is not an example of benzenoid compound?

Match List I with List II

Choose the correct answer from the options given below