[Download PDF] NTA JEE Main 7th January 2020 Shift 1

Instructions

For the following questions answer them individually

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 26

Amongst the following statements, that which was not proposed by Dalton was:

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 27

The number of orbitals associated with quantum numbers $$n = 5$$, $$m_s = +\frac{1}{2}$$ is:

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 28

The electron gain enthalpy (in kJ/mol) of fluorine, chlorine, bromine and iodine, respectively, are

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 29

The dipole moments of CCl$$_4$$, CHCl$$_3$$ and CH$$_4$$ are in the order

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 30

The relative strength of the interionic/ intermolecular forces in a decreasing order is:

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 31

Oxidation number of potassium in K$$_2$$O, K$$_2$$O$$_2$$ and KO$$_2$$, respectively, is:

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 32

In comparison to the zeolite process for the removal of permanent hardness, the synthetic resin method is

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 33

A solution of m-chloroaniline, m-chlorophenol and m-chlorobenzoic acid in ethyl acetate was extracted initially with a saturated solution of NaHCO$$_3$$ to give fraction A. The left over organic phase was extracted with dilute NaOH solution to give fraction B. The final organic layer was labelled as fraction C. Fractions A, B and C, contain respectively:

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 34

The increasing order of pK$$_b$$ for the following compounds will be:

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 35

Consider the following reactions:
(a) $$(CH_3)_3CCH(OH)CH_3 \xrightarrow{\text{conc.} H_2SO_4}$$
(b) $$(CH_3)_2CHCH(Br)CH_3 \xrightarrow{\text{alc. KOH}}$$
(c) $$(CH_3)_2CHCH(Br)CH_3 \xrightarrow{(CH_3)_3O^\ominus K^\oplus}$$
(d)

Which of the reaction(s) will not produce Saytzeff product?

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 36

At 35 $$^\circ$$C, the vapour pressure of CS$$_2$$ is 512 mmHg and that of acetone is 144 mmHg. A solution of CS$$_2$$ in acetone has a total vapour pressure of 600 mmHg. The false statement amongst the following is:

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 37

Given that the standard potentials (E$$^\circ$$) of Cu$$^{2+}$$/Cu and Cu$$^+$$/Cu are 0.34V and 0.522V respectively, the E$$^\circ$$ of Cu$$^{2+}$$/Cu$$^+$$ is:

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 38

The purest form of commercial iron is:

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 39

The atomic radius of Ag is closest to

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 40

The IUPAC name of the complex [Pt(NH$$_3$$)$$_2$$Cl(NH$$_2$$CH$$_3$$)]Cl is

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 41

The theory that can completely/properly explain the nature of bonding in [Ni(CO)$$_4$$] is:

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 42

1-methyl ethylene oxide when treated with an excess of HBr produces

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 43

What is the product of the following reaction?

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 44

Consider the following reaction:

The product 'X' is used:

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 45

Match the following:
(i) Riboflavin (a) Beriberi
(ii) Thiamine     (b) Scurvy
(iii) Pyridoxine   (c) Cheilosis
(iv) Ascorbic acid    (d) Convulsions

Solution

NTA JEE Main 7th January 2020 Shift 1 - Chemistry - Question 46

For the reaction:
A(l) $$\rightarrow$$ 2B(g)
$$\Delta U = 2.1$$ kcal, $$\Delta S = 20$$ cal K$$^{-1}$$ at 300K.
Hence $$\Delta G$$ in kcal is