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

Which of the following statement is correct?

A

$\Delta G$ is equal to $\Delta G^{\circ}$ when the system is at the standard state.

B

$\Delta G^{\circ}$ is zero when the system is at equilibrium.

C

$\Delta G$ measures activation energy of a reaction.

D

When $\Delta G$ is positive, the reaction should proceed forward to form more product.

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

For a given reaction, $2 A \rightleftharpoons B+C$, the equilibrium constant is $2 \times 10^{-3}$. If at any given time the composition of the reaction mixture is $[A]=[B]=[C]=6 \times 10^{-5} \mathrm{M}$; predict in which direction the reaction will proceed and the correct value for reaction quotient.

A

Forward direction and 1.0

B

Backward direction and 1.0

C

Forward direction and $3 \times 10^{-5}$

D

Backward direction and $3 \times 10^{-5}$

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

At atmospheric pressure and very low temperature, water crystallises to

A

hexagonal form

B

cubic form

C

tetragonal form

D

tetrahedral form

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

Which of the following statement(s) are correct, when alkali metals burn in the presence of oxygen?

I. Lithium forms monoxide

II. Sodium forms peroxide

III. Potassium, rubidium and cesium forms superoxide

A

I and II

B

Only III

C

I and III

D

I, II and III

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