NTA JEE Main 27th July 2021 Shift 2 - Chemistry

If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been:

The CORRECT order of first ionisation enthalpy is:

The number of neutrons and electrons, respectively, present in the radioactive isotope of hydrogen is:

Match List - I with List II:
List-I         List-II
a. Li       i.   photoelectric cell
b. Na     ii.  absorbent of CO$$_2$$
c. K       iii. coolant in fast breeder nuclear reactor
d. Cs     iv.  treatment of cancer
              v.  bearings for motor engines
Choose the correct answer from the options given below:

Which one of the following set of elements can be detected using sodium fusion extract?

Given below are two statements:
Statement I : Hyperconjugation is a permanent effect.
Statement II : Hyperconjugation in ethyl cation $$\left(CH_3 - \overset{+}{CH_2}\right)$$ involves the overlapping of $$C_{sp^2} - H_{1s}$$ bond with empty 2p orbital of other carbon.
Choose the correct option:

The correct sequence of correct reagents for the following transformation is:-

Match List - I with List - II:
List - I (compound)                       List - II (effect/affected species)
a. Carbon monoxide                   i.    Carcinogenic
b. Sulphur dioxide                       ii.   Metabolized by pyrus plants
c. Polychlorinated biphenyls     iii.  Haemoglobin
d. Oxides of Nitrogen                 iv.  Stiffness of flower buds
Choose the correct answer from the options given below:

Select the correct statements.
(A) Crystalline solids have long range order.
(B) Crystalline solids are isotropic.
(C) Amorphous solid are sometimes called pseudo solids.
(D) Amorphous solids soften over a range of temperatures.
(E) Amorphous solids have a definite heat of fusion.
Choose the most appropriate answer from the options given below.

Given below are two statement: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : SO$$_2$$(g) is adsorbed to a large extent than H$$_2$$(g) on activated charcoal.
Reason R : SO$$_2$$(g) has a higher critical temperature than H$$_2$$(g)
In the light of the above statements, choose the most appropriate answer from the options given below.

The addition of silica during the extraction of copper from its sulphide ore:-

Number of Cl = O bonds in chlorous acid, chloric acid and perchloric acid respectively are:

Given below are two statements:
Statement I: $$[Mn(CN)_6]^{3-}$$, $$[Fe(CN)_6]^{3-}$$ and $$[Co(C_2O_4)_3]^{3-}$$ are d$$^2$$sp$$^3$$ hybridised.
Statement II: $$[MnCl_6]^{3-}$$ and $$[FeF_6]^{3-}$$ are paramagnetic and have 4 and 5 unpaired electrons, respectively.
In the light of the above statements, choose the correct answer from the options given below:

What is A in the following reaction?

Consider the above reaction and identify "Y"

Given below are two statements:
Statement I : Penicillin is a bacteriostatic type antibiotic.
Statement II : The general structure of Penicillin is:

Choose the correct option:

To an aqueous solution containing ions such as Al$$^{3+}$$, Zn$$^{2+}$$, Ca$$^{2+}$$, Fe$$^{3+}$$, Ni$$^{2+}$$, Ba$$^{2+}$$ and Cu$$^{2+}$$ was added conc. HCl, followed by H$$_2$$S. The total number of cations precipitated during this reaction is/are:

Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is:

$$2SO_2(g) + O_2(g) \rightarrow 2SO_3(g)$$
The above reaction is carried out in a vessel starting with partial pressure $$P_{SO_2} = 250$$ m bar, $$P_{O_2} = 750$$ m bar and $$P_{SO_3} = 0$$ bar. When the reaction is complete, the total pressure in the reaction vessel is _________ m bar. (Round off to the nearest integer).

The total number of electrons in all bonding molecular orbitals of $$O_2^{2-}$$ is _________ (Round off to the nearest integer)

When 400 mL of 0.2 M H$$_2$$SO$$_4$$ solution is mixed with 600 mL of 0.1 M NaOH solution, the increase in temperature of the final solution is _________ $$\times 10^{-2}$$ K. (Round off to the nearest integer).
[Use: H$$^+$$(aq) + OH$$^-$$(aq) $$\rightarrow$$ H$$_2$$O: $$\Delta_r H = -57.1$$ kJ mol$$^{-1}$$
Specific heat of H$$_2$$O = 4.18 J K$$^{-1}$$ g$$^{-1}$$, density of H$$_2$$O = 1.0 g cm$$^{-3}$$
Assume no change in volume of solution on mixing.]

The equilibrium constant for the reaction $$A(s) \rightleftharpoons M(s) + \frac{1}{2}O_2(g)$$ is $$K_p = 4$$. At equilibrium, the partial pressure of O$$_2$$ is _________ atm. (Round off to the nearest integer)

10.0 mL of 0.05 M KMnO$$_4$$ solution was consumed in a titration with 10.0 mL of given oxalic acid dihydrate solution. The strength of given oxalic acid solution is _________ $$\times 10^{-2}$$ g/L. (Round off to the nearest integer)

The dihedral angle in staggered form of Newmann's projection of 1, 1, 1-Trichloro ethane is _________ degree. (Round off to the nearest integer)

In a solvent 50% of an acid HA dimerizes and the rest dissociates. The van't Hoff factor of the acid is _________ $$\times 10^{-2}$$ (Round off to the nearest integer)

For the cell Cu(s)|Cu$$^{2+}$$(aq)(0.1M)||Ag$$^+$$(aq)(0.01M)|Ag(s) the cell potential E$$_1$$ = 0.3095 V. For the cell Cu(s)|Cu$$^{2+}$$(aq)(0.01M)||Ag$$^+$$(aq)(0.001M)|Ag(s) the cell potential = $$x \times 10^{-2}$$ V. Find value of x.
(Round off to the Nearest Integer).
[Use: $$\frac{2.303 RT}{F} = 0.059$$ J]

For the first order reaction A $$\rightarrow$$ 2B, 1 mole of reactant A gives 0.2 moles of $$B$$ after 100 minutes. The half life of the reaction is _________ min. (Round off to nearest integer).
[$$Use: ln 2 = 0.69, ln 10 = 2.3$$
Properties of logarithms: $$\ln x^y = y \ln x$$
$$\ln\left(\frac{x}{y}\right)=\ln x-\ln y$$]
(Round off to the nearest integer)

3 moles of metal complex with formula Co(en)$$_2$$Cl$$_3$$ gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of Co in the complex is _________ (Round off to the nearest integer)