NTA JEE Main 2nd September 2020 Shift 2 - Chemistry

The number of subshells associated with $$n = 4$$ and $$m = -2$$ quantum numbers is:

Three elements X, Y and Z are in the 3$$^{rd}$$ period of the periodic table. The oxides of X, Y and Z, respectively, are basic, amphoteric and acidic. The correct order of the atomic numbers of X, Y and Z is:

The shape/structure of $$[XeF_5]^-$$ and $$XeO_3F_2$$, respectively are:

Match the type of interaction in column A with the distance dependence of their interaction energy in column B:
A                                               B
(i) ion - ion                        (a) $$\frac{1}{r}$$
(ii) Dipole - dipole         (b) $$\frac{1}{r^2}$$
(iii) London dispersion  (c) $$\frac{1}{r^3}$$
                                          (iv) $$\frac{1}{r^6}$$

The molecular geometry of $$SF_6$$ is octahedral. What is the geometry of $$SF_4$$ (including lone pair(s) of electrons, if any)?

Two elements A and B have similar chemical properties. They don't form solid hydrogencarbonates, but react with nitrogen to form nitrides. A and B, respectively, are:

Arrange the following labelled hydrogens in decreasing order of acidity:

An organic compound 'A' $$(C_9H_{10}O)$$ when treated with conc. HI undergoes cleavage to yield compound 'B' and 'C'. 'B' gives yellow precipitate with $$AgNO_3$$ where as 'C' tautomerizes to 'D'. 'D' gives positive iodoform test. 'A' could be:

The major product of the following reaction is:

The size of a raw mango shrinks to a much smaller size when kept in a concentrated salt solution. Which one of the following process can explain this?

The results given in the below table were obtained during kinetic studies of the following reaction:
$$2A + B \to C + D$$

Amongst the following statements regarding adsorption, those that are valid are:
(a) $$\Delta H$$ becomes less negative as adsorption proceeds.
(b) On a given adsorbent, ammonia is adsorbed more than nitrogen gas.
(c) On adsorption, the residual force acting along the surface of the adsorbent increases
(d) With increase in temperature, the equilibrium concentration of adsorbate increases.

Cast iron is used for the manufacture of:

Simplified absorption spectra of three complexes ((i) and (ii) and (iii)) of $$M^{+n}$$ ion are provided below; their $$\lambda_{max}$$ values are marked as A, B and C respectively. The correct match between the complexes and their $$\lambda_{max}$$ values is:

(i) $$[M(NCS)_6]^{(-6+n)}$$
(ii) $$[MF_6]^{(-6+n)}$$
(iii) $$[M(NH_3)_6]^{n+}$$

The one that is not expected to show isomerism is:

The major product obtained from $$E_2$$-elimination of 3-bromo-2-fluoropentane is:

Consider the reaction sequence given below:

Which of the following statements is true:

Two compounds A and B with same molecular formula $$(C_3H_6O)$$ undergo Grignard reaction with methylmagnesium bromide to give products C and D. Products C and D show following chemical tests:

C and D respectively are:

If you spill a chemical toilet cleaning liquid on your hand, your first aid would be:

The correct observation in the following reaction is:
$$Sucrose \xrightarrow[Cleavage \; (Hydrolysis)]{Glycosidic \; bond \; } A + B \xrightarrow[ Reagent]{Seliwanoff } ?$$

The ratio of the mass percentages of 'C & H' and 'C & O' of a saturated acyclic organic compound 'X' are 4 : 1 and 3 : 4 respectively. Then, the moles of oxygen gas required for complete combustion of two moles of organic compound 'X' is ___________.

The work function of sodium metal is $$4.41 \times 10^{-19}$$ J. If photons of wavelength 300 nm are incident on the metal, the kinetics energy of the ejected electrons will be $$(h = 6.63 \times 10^{-34}$$ J s; $$c = 3 \times 10^8$$ m s$$^{-1})$$ ___________ $$\times 10^{-21}$$ J.

The heat of combustion of ethanol into carbon dioxides and water is $$-327$$ Kcal at constant pressure. The heat evolved (in cal) at constant volume at 27$$°$$C (if all gases behave ideally) is $$(R = 2$$ cal mol$$^{-1}$$ K$$^{-1})$$ ___________.

The oxidation states of transition metal atoms in $$K_2Cr_2O_7$$, $$KMnO_4$$ and $$K_2FeO_4$$, respectively, are x, y and z. The sum of x, y and z is ___________.

For the disproportionation reaction $$2Cu^+(aq) \rightleftharpoons Cu(s) + Cu^{2+}(aq)$$ at 298K, ln K (where K is the equilibrium constant) is ___________ $$\times 10^{-1}$$.
Given: $$(E^°_{Cu^{2+}/Cu^+} = 0.16V, E^°_{Cu^+/Cu} = 0.52V, \frac{RT}{F} = 0.025)$$