AP EAPCET 2024 - 22th May Morning Shift | Solid State Question 1 | Chemistry

Zinc oxide (white) is heated to high temperature for some time. Observe the following statements regarding above process. I. Zinc oxide colour changes to pale yellow II. The type of defect formed is 'metal deficiency' III. Some $\mathrm{Zn}^{2-}$ and $\mathrm{e}^{-}$are present in interstitial place The correct statements are

I, II only

I, III, only

II, III only

I,II and III

AP EAPCET 2024 - 21th May Evening Shift

MCQ (Single Correct Answer)

-0

Identify the incorrect set from the following.

$\mathrm{SiO}_2$, covalent solid, insulator, high melting point

MgO , covalent solid, insulator, high melting point

$\mathrm{H}_2 \mathrm{O}_{\text {(ice) }}$, molecular solid, insulator, low melting point.

$\mathrm{Ag}(\mathrm{s})$, metallic solid, conductor, high melting point.

AP EAPCET 2024 - 21th May Morning Shift

MCQ (Single Correct Answer)

-0

What are the variables in the graph of powder diffraction pattern of a crystalline solid?

$X$-axis $=2 \theta: Y$-axis $=$ intensity

$X$-axis $=$ intensity : $Y$-axis $=2 \theta$

$X$-axis $=\theta: Y$-axis $=$ intensity

$X$-axis $=$ intensity : $Y$-axis $=\theta$

AP EAPCET 2024 - 20th May Evening Shift

MCQ (Single Correct Answer)

-0

The density of $\beta-\mathrm{Fe}$ is $7.6 \mathrm{~g} \mathrm{~cm}^{-3}$. It crystallises in cubic lattice with $\mathrm{a}=290 \mathrm{pm}$. What is the value of $Z$ ? $\left(\mathrm{Fe}=56 \mathrm{~g} \mathrm{~mol}^{-1}: N_{\mathrm{A}}=6.022 \times 10^{23} \mathrm{~mol}^{-1}\right)$

AP EAPCET Subjects