1
TS EAMCET 2020 (Online) 14th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

$\Delta_r H$ of which reaction correctly represents the lattice enthalpy of $\mathrm{NaCl}(s)$ ?

A

$\mathrm{NaCl}(\mathrm{s}) \longrightarrow \mathrm{Na}(\mathrm{g})+\mathrm{Cl}(\mathrm{g})$

B

$\mathrm{NaCl}(\mathrm{s}) \longrightarrow \mathrm{Na}^{+}(\mathrm{g})+\mathrm{Cl}^{-}(\mathrm{g})$

C

$\mathrm{Na}(g)+\mathrm{Cl}(g) \longrightarrow \mathrm{NaCl}(s)$

D

$\mathrm{Na}^{+}(g)+\mathrm{Cl}^{-}(g) \longrightarrow \mathrm{NaCl}(\mathrm{s})$

2
TS EAMCET 2020 (Online) 14th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

The volume of a given amount of gas at $27^{\circ} \mathrm{C}$ at constant pressure is $420 \mathrm{~cm}^3$. If the temperature is reduced by $20^{\circ} \mathrm{C}$ at constant pressure, what will be the volume of the gas?

A

$350 \mathrm{~cm}^3$

B

$392 \mathrm{~cm}^3$

C

$450 \mathrm{~cm}^3$

D

$480 \mathrm{~cm}^3$

3
TS EAMCET 2020 (Online) 14th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

The compressibility factor $Z=\frac{p V}{n R T}$ for hydrogen gas a 273 K and 1 atm pressure is

A

zero

B

one

C

greater than one

D

between zero and one

4
TS EAMCET 2020 (Online) 14th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

In the following reaction mixtures,

I. $\mathrm{Cu} / \mathrm{CuSO}_4+\mathrm{Ag} / \mathrm{Ag}_2 \mathrm{SO}_4$

II. $\mathrm{Zn} / \mathrm{ZnSO}_4+\mathrm{Cu} / \mathrm{CuSO}_4$

copper respectively undergoes

A

reduction and reduction

B

oxidation and reduction

C

reduction and oxidation

D

oxidation and oxidation

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