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

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JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

The correct statement is :

A

leaching of bauxite using concentrated NaOH solution gives sodium aluminate and sodium silicate

B

the Hall-Heroult process is used for the production of aluminium and iron

C

pig iron is obtained from cast iron

D

the blistered appearance of copper during the metallurgical process is due to the evolution of CO₂

2

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

3

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

NO₂ required for a reaction is produced by the decomposition of N₂O₅ in CCl₄ as per the equation,
2N₂O₅(g) $$ \to $$ 4NO₂(g) + O₂(g).
The initial concentration of N₂O₅ is 3.00 mol L^–1 and it is 2.75 mol L^–1 after 30 minutes. The rate of formation of NO₂ is :

A

2.083 × 10^–3 mol L^–1 min^–1

B

8.333 × 10^–3 mol L^–1 min^–1

C

4.167 × 10^–3 mol L^–1 min^–1

D

1.667 × 10^–2 mol L^–1 min^–1

4

JEE Main 2019 (Online) 12th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

Which of the given statements is INCORRECT about glycogen?

A

It is a straight chain polymer similar to amylose

B

It is present in animal cells

C

It is present in some yeast and fungi

D

Only $$\alpha $$-linkages are present in the molecule

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