1
TS EAMCET 2020 (Online) 11th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statements regarding the first law of thermodynamics is correct?

A

The energy of the isolated system plus the energy of the surrounding is constant.

B

The energy of the isolated system minus the energy of the surrounding is constant.

C

The energy of an isolated system is constant.

D

The energy of an isolated system varies.

2
TS EAMCET 2020 (Online) 11th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Aqueous solution of ferric nitrate when mixed with aqueous solution of potassium thiocyanate gives red colour solution. The intensity of red colour becomes constant on attaining equilibrium.

Choose the correct statement when the following chemical is added to the above solution at equilibrium.

I. Oxalic acid

II. Mercuric chloride

A

Both (I) and (II) will decrease the intensity of red colour.

B

Both (I) and (II) will increase the intensity of red colour.

C

(I) will increase but (II) will decrease the intensity of red colour.

D

(I) will decrease but (II) will increase the intensity of red colour.

3
TS EAMCET 2020 (Online) 11th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

The pH of the solution, when

(i) sodium acetate is dissolved in water.

(ii) ammonium chloride is dissolved in water.

A

(i) $\mathrm{pH}>7$   (ii) $\mathrm{pH}<7$

B

(i) $\mathrm{pH}=7$   (ii) $\mathrm{pH}=0$

C

(i) $\mathrm{pH}>7$    (ii) $\mathrm{pH}>7$

D

(i) $\mathrm{pH}<7$    (ii) $\mathrm{pH}>7$

4
TS EAMCET 2020 (Online) 11th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Dihydrogen can be prepared by which of the following reactions.

(I) Reaction of granulated Zn with dil. HCl

(II) Reaction of Zn with $a q . \mathrm{NaOH}$

(III) By heating calcium hydrogen carbonate

A

(I) and (III)

B

(I), (II) and (III)

C

(I) and (II)

D

(II) and (III)

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