[Download PDF] NTA JEE Main 12th April 2019 Shift 2

Instructions

For the following questions answer them individually

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 31

25 g of an unknown hydrocarbon upon burning produces 88 g of CO$$_2$$ and 9 g of H$$_2$$O. This unknown hydrocarbon contains:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 32

Among the following, the energy of 2s orbital is lowest in:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 33

In comparison to boron, beryllium has:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 34

The incorrect match in the following is:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 35

In which one of the following equilibria, K$$_p$$ ≠ K$$_c$$?

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 36

The molar solubility of Cd(OH)$$_2$$ is $$1.84 \times 10^{-5}$$ M in water. The expected solubility of Cd(OH)$$_2$$ in a buffer solution of pH = 12 is:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 37

The temporary hardness of a water sample is due to compound X. Boiling this sample converts X to compound Y. X and Y, respectively, are:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 38

The incorrect statement is:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 39

The C - C bond length is maximum in:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 40

The IUPAC name for the following compound is:

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 41

Which one of the following is likely to give a precipitate with AgNO$$_3$$ solution?

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 42

In the following skew conformation of ethane, H' - C - C - H'' dihedral angle is:

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 43

Heating of 2-chloro-1-phenylbutane with EtOK/EtOH gives X as the major product. Reaction X with Hg(OAc)$$_2$$/H$$_2$$O followed by NaBH$$_4$$ gives Y as the major product. Y is:

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 44

The primary pollutant that leads to photochemical smog is:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 45

The ratio of number of atoms present in a simple cubic, body centered cubic and face centered cubic structure are, respectively:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 46

A solution is prepared by dissolving 0.6 g of urea (molar mass = 60 g mol$$^{-1}$$) and 1.8 g of glucose (molar mass = 180 g mol$$^{-1}$$) in 100 mL of water at 27°C. The osmotic pressure of the solution is:
(R = 0.08206 L atm K$$^{-1}$$ mol$$^{-1}$$)

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 47

The decreasing order of electrical conductivity of the following aqueous solutions is:
(A) 0.1 M Formic acid,
(B) 0.1 M Acetic acid,
(C) 0.1 M Benzoic acid.

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 48

NO$$_2$$ required for a reaction is produced by the decomposition of N$$_2$$O$$_5$$ in CCl$$_4$$ as per the equation, 2N$$_2$$O$$_5$$(g) $$\to$$ 4NO$$_2$$(g) + O$$_2$$(g). The initial concentration of N$$_2$$O$$_5$$ is 3.00 mol L$$^{-1}$$ and it is 2.75 mol L$$^{-1}$$ after 30 minutes. The rate of formation of NO$$_2$$ is:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 49

Among the following, the incorrect statement about colloids is:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 50

The correct statement is:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 51

The pair that has similar atomic radii is:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 52

Thermal decomposition of a Mn compound (X) at 513 K results in compound Y, MnO$$_2$$ and a gaseous product. MnO$$_2$$ reacts with NaCl and concentrated H$$_2$$SO$$_4$$ to give a pungent gas Z. X, Y and Z, respectively, are:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 53

The coordination numbers of Co and Al in [Co(Cl)(en)$$_2$$]Cl and K$$_3$$[Al(C$$_2$$O$$_4$$)$$_3$$], respectively are:
(en = ethane-1, 2-diamine)

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 54

The compound used in the treatment of lead poisoning is:

Solution

NTA JEE Main 12th April 2019 Shift 2 - Chemistry - Question 55

An 'Assertion' and a 'Reason' is given below. Choose the correct answer from the following options:
Assertion (A): Vinyl halides do not undergo nucleophilic substitution easily.
Reason (R): Even though the intermediate carbocation is stabilized by loosely held $$\pi$$-electrons, the cleavage is difficult because of the strong bonding.