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JEE Main 2019 (Online) 11th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

Two blocks of the same metal having same mass and at temperature T₁ and T₂, respectively, are brought in contact with each other and allowed to attain thermal equilibrium at constant pressure. The change in entropy, $$\Delta $$S, for this process is :

A

2C_p In $$\left[ {{{{{\left( {{T_1} + {T_2}} \right)}^{{1 \over 2}}}} \over {{T_1}{T_2}}}} \right]$$

B

2C_p In $$\left[ {{{\left( {{T_1} + {T_2}} \right)} \over {2{T_1}{T_2}}}} \right]$$

C

C_p In $$\left[ {{{{{\left( {{T_1} + {T_2}} \right)}^2}} \over {4{T_1}{T_2}}}} \right]$$

D

2C_p In $$\left[ {{{\left( {{T_1} + {T_2}} \right)} \over {4{T_1}{T_2}}}} \right]$$

2

JEE Main 2019 (Online) 11th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

Among the following compounds, which one is found in RNA ?

A

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Biomolecules Question 121 English Option 1

B

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Biomolecules Question 121 English Option 2

C

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Biomolecules Question 121 English Option 3

D

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Biomolecules Question 121 English Option 4

3

JEE Main 2019 (Online) 11th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

The major product of the following reaction is :

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Compounds Containing Nitrogen Question 166 English

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Compounds Containing Nitrogen Question 166 English

A

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Compounds Containing Nitrogen Question 166 English Option 1

B

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Compounds Containing Nitrogen Question 166 English Option 2

C

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Compounds Containing Nitrogen Question 166 English Option 3

D

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Compounds Containing Nitrogen Question 166 English Option 4

4

JEE Main 2019 (Online) 11th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

Which compound (s) out of the following is/are not aromatic ?

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Hydrocarbons Question 99 English

JEE Main 2019 (Online) 11th January Morning Slot Chemistry - Hydrocarbons Question 99 English

A

(A) and (C)

B

(C) and (D)

C

(B)

D

(B), (C) and (D)

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