JEE Main 2019 (Online) 12th April Evening Slot | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

1

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

An 'Assertion' and a 'Reason' are 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 p-electrons, the cleavage is difficult because of strong bonding.

A

Both (A) and (R) are correct statements but (R) is not the correct explanation of (A)

B

Both (A) and (R) are correct statements and (R) is the correct explanation of (A)

C

(A) is correct statement but (R) is a wrong statement

D

Both (A) and (R) are wrong statements.

2

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

In comparison to boron, berylium has :

A

lesser nuclear charge and greater first ionisation enthalpy

B

greater nuclear charge and greater first ionisation enthalpy

C

greater nuclear charge and lesser first ionisation enthalpy

D

lesser nuclear charge and lesser first ionisation ethalpy

3

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

The pair that has similar atomic radii is :

A

Mo and W

B

Mn and Fe

C

Ti and Hf

D

Sc and Ni

4

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

25 g of an unknown hydrocarbon upon burning produces 88 g of CO₂ and 9 g of H₂O. This unknown hydrocarbon contains :

A

18 g of carbon and 7 g of hydrogen

B

20 g of carbon and 5 g of hydrogen

C

22 g of carbon and 3 g of hydrogen

D

24 g of carbon and 1 g of hydrogen

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2026

JEE Main 2026 (Online) 8th April Evening Shift

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2025

JEE Main 2025 (Online) 8th April Evening Shift

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2024

JEE Main 2024 (Online) 9th April Evening Shift

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2023

JEE Main 2023 (Online) 15th April Morning Shift

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2022

JEE Main 2022 (Online) 29th July Evening Shift

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2021

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2020

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2019

JEE Main 2019 (Online) 12th April Evening Slot

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JEE Main 2019 (Online) 10th April Evening Slot

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JEE Main 2019 (Online) 9th April Evening Slot

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JEE Main 2019 (Online) 12th January Evening Slot

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2018

JEE Main 2018 (Online) 16th April Morning Slot

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2017

JEE Main 2017 (Online) 9th April Morning Slot

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