[Download PDF] NTA JEE Main 16 th April 2018 Online

Instructions

For the following questions answer them individually

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 31

An unknown chlorohydrocarbon has 3.55% of chlorine. If each molecule of the hydrocarbon has one chlorine atom only; chlorine atoms present in 1 g of chlorohydrocarbon are: (Atomic wt. of Cl = 35.5 u; Avogadro constant = 6.023 $$\times$$ 10$$^{23}$$ mol$$^{-1}$$)

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 32

Which of the following statements is false?

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 33

Which of the following conversions involves change in both shape and hybridisation?

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 34

The most polar compound among the following is:

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 35

The incorrect geometry is represented by:

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 36

Assuming ideal gas behavior, the ratio of density of ammonia to that of hydrogen chloride at same temperature and pressure is: (Atomic weight of Cl is 35.5 u)

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 37

At 320 K, a gas A$$_2$$ is 20% dissociated to A(g). The standard Gibbs free energy change at 320 K and 1 atm in J mol$$^{-1}$$ is approximately: (R = 8.314 J K$$^{-1}$$ mol$$^{-1}$$; ln 2 = 0.693; ln 3 = 1.098)

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 38

For which of the following processes, $$\Delta S$$ is negative?

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 39

For standardizing NaOH solution, which of the following is used as a primary standard?

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 40

The gas phase reaction 2NO$$_2$$(g) $$\rightarrow$$ N$$_2$$O$$_4$$(g) is an exothermic reaction. The decomposition of N$$_2$$O$$_4$$, in equilibrium mixture of NO$$_2$$(g) and N$$_2$$O$$_4$$(g) can be increased by:

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 41

A group 13 element 'X' reacts with chlorine gas to produce a compound XCl$$_3$$. XCl$$_3$$ is electron deficient and easily reacts with NH$$_3$$ to form Cl$$_3$$X $$\leftarrow$$ NH$$_3$$ adduct; however, XCl$$_3$$ does not dimerize. X is:

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 42

The major product of the following reaction is:

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 43

The mass of a non-volatile, non-electrolyte solute (molar mass = 50 g mol$$^{-1}$$) needed to be dissolved in 114 g octane to reduce its vapour pressure by 75%, is:

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 44

When 9.65 ampere current was passed for 1.0 hour into nitrobenzene in acidic medium, the amount of p-aminophenol produced is:

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 45

If 50% of a reaction occurs in 100 second and 75% of the reaction occurs in 200 second, the order of this reaction is:

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 46

Which one of the following is not a property of physical adsorption?

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 47

In the extraction of copper from its sulphide ore, metal is finally obtained by the oxidation of cuprous sulphide with:

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 48

Among the oxides of nitrogen: N$$_2$$O$$_3$$, N$$_2$$O$$_4$$ and N$$_2$$O$$_5$$; the molecule(s) having nitrogen-nitrogen bond is/are:

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 49

When XO$$_2$$ is fused with an alkali metal hydroxide in presence of an oxidizing agent such as KNO$$_3$$; a dark green product is formed which disproportionate in acidic solution to afford a dark purple solution. X is:

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 50

The incorrect statement is:

Solution

NTA JEE Main 16 th April 2018 Online - Chemistry - Question 51

In a complexometric titration of metal ion with ligand M (Metal ion) + L(Ligand) $$\rightarrow$$ C (Complex). End point is estimated spectrophotometrically (through light absorption). If 'M' and 'C' do not absorb light and only 'L' absorbs then the titration plot between absorbed light (A) versus volume of ligand 'L' (V) would look like: