NTA JEE Main 27th July 2021 Shift 2 - Chemistry

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 31

Report

If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been:

A

All of the $$\alpha$$-particles pass through the gold foil without decrease in speed.

B

$$\alpha$$-particles are deflected over a wide range of angles.

C

All $$\alpha$$-particles get bounced back by 180°.

D

$$\alpha$$-particles pass through the gold foil deflected by small angles and with reduced speed.

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 32

Report

The CORRECT order of first ionisation enthalpy is:

A

Mg < S < Al < P

B

Mg < Al < S < P

C

Al < Mg < S < P

D

Mg < Al < P < S

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 33

Report

The number of neutrons and electrons, respectively, present in the radioactive isotope of hydrogen is:

A

1 and 1

B

3 and 1

C

2 and 1

D

2 and 2

View Solution Video Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 34

Report

Match List - I with List II:
List-I         List-II
a. Li       i.   photoelectric cell
b. Na     ii.  absorbent of CO$$_2$$
c. K       iii. coolant in fast breeder nuclear reactor
d. Cs     iv.  treatment of cancer
              v.  bearings for motor engines
Choose the correct answer from the options given below:

A

(a)-(v), (b)-(i), (c)-(ii), (d)-(iv)

B

(a)-(v), (b)-(ii), (c)-(iv), (d)-(i)

C

(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

D

(a)-(v), (b)-(iii), (c)-(ii), (d)-(i)

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 35

Report

Which one of the following set of elements can be detected using sodium fusion extract?

A

Sulfur, Nitrogen, Phosphorus, Halogens

B

Phosphorus, Oxygen, Nitrogen, Halogens

C

Nitrogen, Phosphorus, Carbon, Sulfur

D

Halogens, Nitrogen, Oxygen, Sulfur

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 36

Report

Given below are two statements:
Statement I : Hyperconjugation is a permanent effect.
Statement II : Hyperconjugation in ethyl cation $$\left(CH_3 - \overset{+}{CH_2}\right)$$ involves the overlapping of $$C_{sp^2} - H_{1s}$$ bond with empty 2p orbital of other carbon.
Choose the correct option:

A

Both statement I and statement II are false

B

Statement I is incorrect but statement II is true

C

Statement I is correct but statement II is false

D

Both Statement I and statement II are true.

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 37

Report

Consider the above reaction, and choose the correct statement:

A

The reaction is not possible in acidic medium

B

Both compounds A and B are formed equally

C

Compound A will be the major product

D

Compound B will be the major product

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 38

Report

The correct sequence of correct reagents for the following transformation is:-

A

(i) Fe, HCl
(ii) Cl$$_2$$, HCl
(iii) NaNO$$_2$$, HCl, 0°C
(iv) H$$_2$$O/H$$^+$$

B

(i) Fe, HCl
(ii) NaNO$$_2$$, HCl, 0°C
(iii) H$$_2$$O/H$$^+$$
(iv) Cl$$_2$$, FeCl$$_3$$

C

(i) Cl$$_2$$, FeCl$$_3$$
(ii) Fe, HCl
(iii) NaNO$$_2$$, HCl, 0°C
(iv) H$$_2$$O/H$$^+$$

D

(i) Cl$$_2$$, FeCl$$_3$$
(ii) NaNO$$_2$$, HCl, 0°C
(iii) Fe, HCl
(iv) H$$_2$$O/H$$^+$$

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 39

Report

Match List - I with List - II:
List - I (compound)                       List - II (effect/affected species)
a. Carbon monoxide                   i.    Carcinogenic
b. Sulphur dioxide                       ii.   Metabolized by pyrus plants
c. Polychlorinated biphenyls     iii.  Haemoglobin
d. Oxides of Nitrogen                 iv.  Stiffness of flower buds
Choose the correct answer from the options given below:

A

(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

B

(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)

C

(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

D

(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 40

Report

Select the correct statements.
(A) Crystalline solids have long range order.
(B) Crystalline solids are isotropic.
(C) Amorphous solid are sometimes called pseudo solids.
(D) Amorphous solids soften over a range of temperatures.
(E) Amorphous solids have a definite heat of fusion.
Choose the most appropriate answer from the options given below.

A

(A), (B), (E) only

B

(B), (D) only

C

(C), (D) only

D

(A), (C), (D) only

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 41

Report

Given below are two statement: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : SO$$_2$$(g) is adsorbed to a large extent than H$$_2$$(g) on activated charcoal.
Reason R : SO$$_2$$(g) has a higher critical temperature than H$$_2$$(g)
In the light of the above statements, choose the most appropriate answer from the options given below.

A

Both A and R are correct but R is not the correct explanation for A

B

Both A and R are correct and R is the correct explanation of A.

C

A is not correct but R is correct.

D

A is correct but R is not correct.

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 42

Report

The addition of silica during the extraction of copper from its sulphide ore:-

A

converts copper sulphide into copper silicate

B

converts iron oxide into iron silicate

C

reduces copper sulphide into metallic copper

D

reduces the melting point of the reaction mixture

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 43

Report

Number of Cl = O bonds in chlorous acid, chloric acid and perchloric acid respectively are:

A

3, 1 and 1

B

4, 1 and 0

C

1, 1 and 3

D

1, 2 and 3

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 44

Report

Given below are two statements:
Statement I: $$[Mn(CN)_6]^{3-}$$, $$[Fe(CN)_6]^{3-}$$ and $$[Co(C_2O_4)_3]^{3-}$$ are d$$^2$$sp$$^3$$ hybridised.
Statement II: $$[MnCl_6]^{3-}$$ and $$[FeF_6]^{3-}$$ are paramagnetic and have 4 and 5 unpaired electrons, respectively.
In the light of the above statements, choose the correct answer from the options given below:

A

Statement I is correct but statement II is false

B

Both statement I and statement II are false

C

Statement I is incorrect but statement II is true

D

Both statement I and statement II are true

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 45

Report

What is A in the following reaction?

A

B

C

D

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 46

Report

Consider the above reaction, the major product P formed is:

A

B

C

D

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 47

Report

Consider the above reaction and identify "Y"

A

$$-CH_2NH_2$$

B

$$-CONH_2$$

C

$$-CHO$$

D

$$-COOH$$

View Solution Video Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 48

Report

Given below are two statements:
Statement I : Penicillin is a bacteriostatic type antibiotic.
Statement II : The general structure of Penicillin is:

Choose the correct option:

A

Both statement I and statement II are false

B

Statement I is incorrect but statement II is true

C

Both statement I and statement II are true

D

Statement I is correct but statement II is false

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 49

Report

To an aqueous solution containing ions such as Al$$^{3+}$$, Zn$$^{2+}$$, Ca$$^{2+}$$, Fe$$^{3+}$$, Ni$$^{2+}$$, Ba$$^{2+}$$ and Cu$$^{2+}$$ was added conc. HCl, followed by H$$_2$$S. The total number of cations precipitated during this reaction is/are:

A

1

B

3

C

4

D

2

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 50

Report

Compound A gives D-Galactose and D-Glucose on hydrolysis. The compound A is:

A

Amylose

B

Sucrose

C

Maltose

D

Lactose

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 51

Report

$$2SO_2(g) + O_2(g) \rightarrow 2SO_3(g)$$
The above reaction is carried out in a vessel starting with partial pressure $$P_{SO_2} = 250$$ m bar, $$P_{O_2} = 750$$ m bar and $$P_{SO_3} = 0$$ bar. When the reaction is complete, the total pressure in the reaction vessel is _________ m bar. (Round off to the nearest integer).

Backspace
789
456
123
0.-
Clear All

Submit

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 52

Report

The total number of electrons in all bonding molecular orbitals of $$O_2^{2-}$$ is _________ (Round off to the nearest integer)

Backspace
789
456
123
0.-
Clear All

Submit

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 53

Report

When 400 mL of 0.2 M H$$_2$$SO$$_4$$ solution is mixed with 600 mL of 0.1 M NaOH solution, the increase in temperature of the final solution is _________ $$\times 10^{-2}$$ K. (Round off to the nearest integer).
[Use: H$$^+$$(aq) + OH$$^-$$(aq) $$\rightarrow$$ H$$_2$$O: $$\Delta_r H = -57.1$$ kJ mol$$^{-1}$$
Specific heat of H$$_2$$O = 4.18 J K$$^{-1}$$ g$$^{-1}$$, density of H$$_2$$O = 1.0 g cm$$^{-3}$$
Assume no change in volume of solution on mixing.]

Backspace
789
456
123
0.-
Clear All

Submit

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 54

Report

The equilibrium constant for the reaction $$A(s) \rightleftharpoons M(s) + \frac{1}{2}O_2(g)$$ is $$K_p = 4$$. At equilibrium, the partial pressure of O$$_2$$ is _________ atm. (Round off to the nearest integer)

Backspace
789
456
123
0.-
Clear All

Submit

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 55

Report

10.0 mL of 0.05 M KMnO$$_4$$ solution was consumed in a titration with 10.0 mL of given oxalic acid dihydrate solution. The strength of given oxalic acid solution is _________ $$\times 10^{-2}$$ g/L. (Round off to the nearest integer)

Backspace
789
456
123
0.-
Clear All

Submit

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 56

Report

The dihedral angle in staggered form of Newmann's projection of 1, 1, 1-Trichloro ethane is _________ degree. (Round off to the nearest integer)

Backspace
789
456
123
0.-
Clear All

Submit

View Solution Video Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 57

Report

In a solvent 50% of an acid HA dimerizes and the rest dissociates. The van't Hoff factor of the acid is _________ $$\times 10^{-2}$$ (Round off to the nearest integer)

Backspace
789
456
123
0.-
Clear All

Submit

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 58

Report

For the cell Cu(s)|Cu$$^{2+}$$(aq)(0.1M)||Ag$$^+$$(aq)(0.01M)|Ag(s) the cell potential E$$_1$$ = 0.3095 V. For the cell Cu(s)|Cu$$^{2+}$$(aq)(0.01M)||Ag$$^+$$(aq)(0.001M)|Ag(s) the cell potential = $$x \times 10^{-2}$$ V. Find value of x.
(Round off to the Nearest Integer).
[Use: $$\frac{2.303 RT}{F} = 0.059$$ J]

Backspace
789
456
123
0.-
Clear All

Submit

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 59

Report

For the first order reaction A $$\rightarrow$$ 2B, 1 mole of reactant A gives 0.2 moles of $$B$$ after 100 minutes. The half life of the reaction is _________ min. (Round off to nearest integer).
[$$Use: ln 2 = 0.69, ln 10 = 2.3$$
Properties of logarithms: $$\ln x^y = y \ln x$$
$$\ln\left(\frac{x}{y}\right)=\ln x-\ln y$$]
(Round off to the nearest integer)

Backspace
789
456
123
0.-
Clear All

Submit

View Solution

NTA JEE Main 27th July 2021 Shift 2 - Chemistry - Question 60

Report

3 moles of metal complex with formula Co(en)$$_2$$Cl$$_3$$ gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of Co in the complex is _________ (Round off to the nearest integer)

Backspace
789
456
123
0.-
Clear All

Submit

View Solution