NTA JEE Main 28th June 2022 Shift 1 - Chemistry

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NTA JEE Main 28th June 2022 Shift 1 - Chemistry - Question 36

The incorrect statement about the imperfections in solids is

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NTA JEE Main 28th June 2022 Shift 1 - Chemistry - Question 38

Given are two statements one is labelled as Assertion and other is labelled as Reason.
Assertion: Magnesium can reduce $$Al_2O_3$$ at a temperature below $$1350°$$C, while above $$1350°$$C aluminium can reduce MgO.
Reason: The melting and boiling points of magnesium are lower than those of aluminium.

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NTA JEE Main 28th June 2022 Shift 1 - Chemistry - Question 40

Given below are two statements :
Statement I: The pentavalent oxide of group-15 element, $$E_2O_5$$, is less acidic than trivalent oxide, $$E_2O_3$$, of the same element.
Statement II : The acidic character of trivalent oxide of group 15 elements, $$E_2O_3$$, decreases down the group.

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NTA JEE Main 28th June 2022 Shift 1 - Chemistry - Question 43

Given below are two statements :
Statement I: $$[Ni(CN)_4]^{2-}$$ is square planar and diamagnetic complex, with $$dsp^2$$ hybridization for Ni but $$[Ni(CO)_4]$$ is tetrahedral, paramagnetic and with $$sp^3$$ hybridication for Ni.
Statement II : $$[NiCl_4]^{2-}$$ and $$[Ni(CO)_4]$$ both have same d-electron configuration, have same geometry and are paramagnetic.
In light the above statements, choose the correct answer form the options given below

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NTA JEE Main 28th June 2022 Shift 1 - Chemistry - Question 51

If the work function of a metal is $$6.63 \times 10^{-19}$$ J, the maximum wavelength of the photon required to remove a photoelectron from the metal is ______ nm. Nearest integer
[Given : $$h = 6.63 \times 10^{-34}$$ J s, and $$c = 3 \times 10^{8}$$ m s$$^{-1}$$]

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NTA JEE Main 28th June 2022 Shift 1 - Chemistry - Question 54

A $$2.0$$ g sample containing $$MnO_2$$ is treated with HCl liberating $$Cl_2$$. The $$Cl_2$$ gas is passed into a solution of KI and $$60.0$$ mL of $$0.1$$ M $$Na_2S_2O_3$$ is required to titrate the liberated iodine. The percentage of $$MnO_2$$ in the sample is ______ Nearest integer
[Atomic masses (in u) Mn = 55; Cl = 35.5; O = 16, I = 127, Na = 23, K = 39, S = 32]

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NTA JEE Main 28th June 2022 Shift 1 - Chemistry - Question 56

The vapour pressures of two volatile liquids A and B at $$25°$$C are $$50$$ Torr and $$100$$ Torr, respectively. If the liquid mixture contains $$0.3$$ mole fraction of A, then the mole fraction of liquid B in the vapour phase is $$\frac{x}{17}$$. The value of $$x$$ is ______

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NTA JEE Main 28th June 2022 Shift 1 - Chemistry - Question 59

For a first order reaction A $$\to$$ B, the rate constant, $$k = 5.5 \times 10^{-14}$$ s$$^{-1}$$. The time required for $$67\%$$ completion of reaction is $$x \times 10^{-1}$$ times the half life of reaction. The value of $$x$$ is ______ Nearest integer) (Given : $$\log 3 = 0.4771$$)

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