[Download PDF] NTA JEE Main 9th January 2020 Shift 1

For the following questions answer them individually

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 26

The de Broglie wavelength of an electron in the $$4^{th}$$ Bohr orbit is:

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 27

B has a smaller first ionization enthalpy than Be. Consider the following statement:
(I) it is easier to remove 2p electron than 2s electron
(II) 2p electron of B is more shielded from the nucleus by the inner core of electrons than the 2s electrons of Be
(III) 2s electron has more penetration power than 2p electron
(IV) atomic radius of B is more than Be
(atomic number B : 5, Be = 4)
The correct statements are:

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 28

The acidic, basic and amphoteric oxides, respectively, are:

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 29

If the magnetic moment of a di-oxygen species is 1.73 B.M., it may be:

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 30

If enthalpy of atomization for $$Br_2(l)$$ is $$x$$ kJ/mol and bond enthalpy for $$Br_2$$ is $$y$$ kJ/mol, the relation between them:

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 31

The $$K_{sp}$$ for the following dissociation is $$1.6 \times 10^{-5}$$
$$PbCl_{2(s)} \rightleftharpoons Pb^{2+}_{(aq)} + 2Cl^{-}_{(aq)}$$
Which of the following choices is correct for a mixture of 300 mL 0.134 M $$Pb(NO_3)_2$$ and 100 mL 0.4 M NaCl?

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 32

The compound that cannot act both as oxidizing and reducing agent is:

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 33

'X' melts at low temperature and is a bad conductor of electricity in both liquid and solid state. X is:

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 34

The increasing order of basicity for the following intermediates is (from weak to strong):

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 35

The correct order of heat of combustion for following alkadienes is:

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 36

The major product (Y) in the following reactions is:

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 37

For the following reactions:
$$A \xrightarrow{700K} Product$$
$$A \xrightarrow[catalyst]{500K} Product$$
It was found that the $$E_a$$ is decreased by 30 KJ/mol in the presence of catalyst. If the rate remains unchanged, the activation energy for catalysed reaction is (Assume pre-exponential factor is same):

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 38

According to the following diagram, A reduces $$BO_2$$ when the temperature is:

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 39

The electronic configurations of bivalent europium and trivalent cerium are:
(atomic number: Xe = 54, Ce = 58, Eu = 63)

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 40

Complex X of composition $$Cr(H_2O)_6Cl_n$$ has a spin only magnetic moment of 3.83 B.M. It reacts with $$AgNO_3$$ and shows geometrical isomerism. The IUPAC nomenclature of X is:

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 41

$$[Pd(F)(Cl)(Br)(I)]^{2-}$$ has $$n$$ number of geometrical isomers. Then, the spin-only magnetic moment and crystal field stabilization energy [CFSE] of $$[Fe(CN)_6]^{n-6}$$, respectively, are:
[Note: Ignore the pairing energy]

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 42

Which of these will produce the highest yield Friedel Crafts reaction?

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 43

Identify (A) in the following reaction sequence:

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 44

The major product Z obtained in the following reaction scheme is:

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 45

A chemist has 4 samples of artificial sweetener A, B, C and D. To identify these samples, he performed certain experiments and noted the following observations:
(i) A and D both form blue-violet colour with ninhydrin.
(ii) Lassaigne extract of C gives positive $$AgNO_3$$ test and negative $$Fe_4[Fe(CN)_6]_3$$ test.
(iii) Lassaigne extract of B and D gives positive sodium nitroprusside test.
Based on these observations which option is correct?

NTA JEE Main 9th January 2020 Shift 1 - Chemistry - Question 46

The molarity of $$HNO_3$$ in a sample which has density 1.4 g/mL and mass percentage of 63% is ___________.
(Molecular Weight of $$HNO_3 = 63$$)