[Download PDF] NTA JEE Main 9th April 2019 Shift 2

Instructions

For the following questions answer them individually

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 31

What would be the molality of 20% (mass/mass) aqueous solution of KI? (molar mass of KI = 166 g mol$$^{-1}$$)

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 32

Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect? (The Bohr radius is represented by a$$_0$$).

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 33

Among the following species, the diamagnetic molecule is:

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 34

At a given temperature T, gases Ne, Ar, Xe and Kr are found to deviate from ideal gas behaviour. Their equation of state is given as $$p = \frac{RT}{V - b}$$ at T. Here, b is the van der Waals constant. Which gas will exhibit steepest increase in the plot of Z (compression factor) vs p?

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 35

During compression of a spring the work done is 10 kJ and 2 kJ escaped to the surroundings as heat. The change in internal energy, $$\Delta U$$ (in kJ) is:

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 36

In an acid-base titration, 0.1 M HCl solution was added to the NaOH solution of unknown strength. Which of the following correctly shows the change of pH of the titration mixture in this experiment?

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 37

The structures of beryllium chloride in the solid state and vapour phase, respectively, are:

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 38

The correct statements among I to III regarding group 13 element oxides are,
(I) Boron trioxide is acidic.
(II) Oxides of aluminum and gallium are amphoteric.
(III) Oxides of indium and thallium are basic.

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 39

The amorphous form of silica is:

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 40

The layer of atmosphere between 10 km to 50 km above the sea level is called as:

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 41

Molal depression constant for a solvent is 4.0 K kg mol$$^{-1}$$. The depression in the freezing point of the solvent for 0.03 mol kg$$^{-1}$$ solution of K$$_2$$SO$$_4$$ is: (Assume complete dissociation of the electrolyte)

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 42

A solution of Ni(NO$$_3$$)$$_2$$ is electrolyzed between platinum electrode 0.1 Faraday electricity. How many mole of Ni will be deposited at the cathode?

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 43

Consider the given plot of enthalpy of the following reaction between A and B.
A + B $$\rightarrow$$ C + D. Identify the incorrect statement.

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 44

10 mL of 1 mM surfactant solution forms a monolayer covering 0.24 cm$$^2$$ on a polar substrate. If the polar head is approximated as a cube, what is its edge length?

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 45

The one that is not a carbonate ore is:

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 46

Assertion: For the extraction of iron, haematite ore is used.
Reason: Haematite is a carbonate ore of iron.

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 47

HF has highest boiling point among hydrogen halides, because it has:

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 48

The maximum number of possible oxidation states of actinoids are shown by:

Solution

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 49

The maximum possible denticities of a ligand given below towards a common transition and inner-transition metal ion, respectively, are:

NTA JEE Main 9th April 2019 Shift 2 - Chemistry - Question 50

The correct statements among I to III are:
(I) Valence bond theory cannot explain the color exhibited by transition metal complexes.
(II) Valence bond theory can predict quantitatively the magnetic properties of transition metal complexes.
(III) Valence bond theory cannot distinguish ligands as weak and strong field ones.