NTA JEE Main 3rd September 2020 Shift 1 - Chemistry

The atomic number of the element unnilennium is:

If the boiling point of $$H_2O$$ is 373 K, and the boiling point of $$H_2S$$ will be:

Of the species, NO, NO$$^+$$, NO$$^{2+}$$ and NO$$^-$$, the one with minimum bond strength is:

An acidic buffer is obtained on mixing:

Which one of the following compounds possesses the most acidic hydrogen?

Glycerol is separated in soap industries by:

The Kjeldahl method of Nitrogen estimation fails for which of the following reaction products?

Which of the following compounds produces an optically inactive compound on hydrogenation?

Thermal power plants can lead to:

Henry's constant (in kbar) for four gases $$\alpha$$, $$\beta$$, $$\gamma$$ and $$\delta$$ in water at 298 K is given below:

(density of water = 10$$^3$$ kg m$$^{-3}$$ at 298 K) This table implies that:

Let $$C_{NaCl}$$ and $$C_{BaSO_4}$$, be the conductances (in S) measured for saturated aqueous solutions of NaCl and $$BaSO_4$$ respectively, at a temperature T. Which of the following is false?

It is true that:

Tyndall effect is observed when:

Aqua regia is used for dissolving noble metals (Au, Pt, etc.). The gas evolved in this process is

In a molecule of pyrophosphoric acid, the number of P - O - H, P = O and P - O - P bonds/moiety(ies) respectively are:

The electronic spectrum of $$\left[Ti(H_2O)_6\right]^{3+}$$ shows a single broad peak with a maximum at 20,300 cm$$^{-1}$$. The crystal field stabilization energy (CFSE) of the complex ion, in kJ mol$$^{-1}$$, is: (1 kJ mol$$^{-1}$$ = 83.7 cm$$^{-1}$$)

The complex that can show optical activity is:

The mechanism of Sn1 reaction is given as:
$$R - X \rightarrow R^\oplus X^\ominus \rightarrow R^\oplus \| X^\ominus \xrightarrow{Y^\ominus} R - Y + X^\ominus$$
Ion pair    Solvent separated ion pair
A student writes general characteristics based on the given mechanism as:
(a) The reaction is favoured by weak nucleophiles.
(b) $$R^\oplus$$ would be easily formed if the substituents are bulky
(c) The reaction is accompanied by racemization
(d) The reaction is favoured by non-polar solvents.
Which observations are correct?

An organic compound [A], molecular formula $$C_{10}H_{20}O_2$$ was hydrolyzed with dilute sulphuric acid to give a carboxylic acid [B] and an alcohol [C]. Oxidation of [C] with $$CrO_3 - H_2SO_4$$ produced [B]. Which of the following structures are not possible for [A]?

The antifertility drug "Novestrol" can react with:

The mole fraction of glucose ($$C_6H_{12}O_6$$) in an aqueous binary solution is 0.1. The mass percentage of water in it, to the nearest integer, is .........

The volume strength of 8.9 M $$H_2O_2$$ solution calculated at 273 K and 1 atm is ......... ($$R = 0.0821$$ L atm K$$^{-1}$$ mol$$^{-1}$$) (rounded off to the nearest integer)

The total number of monohalogenated organic products in the following (including stereoisomers) reaction is
A (Simplest optically active alkene) $$\xrightarrow[(ii) X_2/\Delta]{(i) H_2/Ni/\Delta}$$ 

An element with molar mass $$2.7 \times 10^{-2}$$ kg mol$$^{-1}$$ forms a cubic unit cell with edge length 405 pm. If its density is $$2.7 \times 10^3$$ kg m$$^{-3}$$, the radius of the element is approximately ......... $$\times 10^{-12}$$ m (to the nearest integer)

The photoelectric current from Na (work function, $$w_0 = 2.3$$ eV) is stopped by the output voltage of the cell
Pt(s)|H$$_2$$(g, 1 bar)|HCl(aq, pH = 1)|AgCl(s)|Ag(s)
The pH of aq. HCl required to stop the photoelectric current from K($$w_0 = 2.25$$ eV), all other conditions remaining the same, is ......... $$\times 10^{-2}$$ (to the nearest integer).
Given $$2.303\frac{RT}{F} = 0.06$$ V; $$E^0_{AgCl/Ag/Cl} = 0.22$$ V