1

JEE Main 2019 (Online) 11th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

The radius of the largest sphere which fits properly at the centre of the edge of a body centred cubic unit cell is : (Edge length is represented by 'a')

2

JEE Main 2019 (Online) 11th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

A solid having density of 9$$ \times $$10

[Avogadro constant $$ \cong $$ 6 $$ \times $$ 10

^{3}kg m^{–3}forms face centred cubic crystals of edge length $$200\sqrt 2 $$ pm. What is the molar mass of the solid?[Avogadro constant $$ \cong $$ 6 $$ \times $$ 10

^{23}mol^{–1}, $$\pi $$ $$ \cong $$ 3]3

JEE Main 2019 (Online) 10th January Evening Slot

MCQ (Single Correct Answer)

+4

-1

A compound of formula A

_{2}B_{3}has the hcp lattice. Which atom forms the hcp lattice and what fraction of tetrahedral voids is occupied by the other atoms :4

JEE Main 2019 (Online) 10th January Morning Slot

MCQ (Single Correct Answer)

+4

-1

Which premitive unit cell has unequal edge lengths (a $$ \ne $$ b $$ \ne $$ c) and all axial angles different from 90

^{o}?Questions Asked from Solid State (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates No. of Questions

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