JEE Main 2019 (Online) 11th January Morning Slot | Solid State Question 48 | Chemistry

This chapter is currently out of syllabus

JEE Main 2019 (Online) 11th January Morning Slot

MCQ (Single Correct Answer)

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A solid having density of 9$$ \times $$10³ 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 $$ \times $$ 10²³ mol^–1 , $$\pi $$ $$ \cong $$ 3]

0.0305 kg mol^–1

0.4320 kg mol^–1

0.0216 kg mol^–1

0.0432 kg mol^–1

JEE Main 2019 (Online) 10th January Evening Slot

MCQ (Single Correct Answer)

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Out of Syllabus

A compound of formula A₂B₃ has the hcp lattice. Which atom forms the hcp lattice and what fraction of tetrahedral voids is occupied by the other atoms :

hcp lattice - A, $${1 \over 3}$$ Tetrahedral voids-B

hcp lattice - B, $${1 \over 3}$$ Tetrahedral voids - A

hcp lattice - A, $${2 \over 3}$$ Tetrahedral voids - B

hcp lattice - B, $${2 \over 3}$$ Tetrahedral voids - A

JEE Main 2019 (Online) 10th January Morning Slot

MCQ (Single Correct Answer)

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Out of Syllabus

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

Hexagonal

Tetragonal

Triclinic

Monoclinic

JEE Main 2019 (Online) 9th January Evening Slot

MCQ (Single Correct Answer)

-1

Out of Syllabus

At 100^oC, copper (Cu) has FCC unit cell structure with cell edge length of x $$\mathop A\limits^o $$. What is the approximate density of Cu (in g cm^$$-$$3) at this temperature?
[Atomic Mass of Cu = 63.55 u]

$${{205} \over {{x^3}}}$$

$${{105} \over {{x^3}}}$$

$${{211} \over {{x^3}}}$$

$${{422} \over {{x^3}}}$$

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