1
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) $\mathrm{pH}>7$

2
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)

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

The carbonates of alkaline earth metals decompose on heating to give

I. $\mathrm{CO}_2$

II. Metal oxide

III. $\mathrm{H}_2 \mathrm{O}$

IV. CO

A

(I), (III) and (IV)

B

(I) and (II)

C

(I), (II) and (III)

D

(II) and (III)

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

Borax is converted into crystalline boron by the following steps :

$$ \text { Borax } \xrightarrow[\mathrm{H}_2 \mathrm{O}]{X} \mathrm{H}_3 \mathrm{BO}_3 \xrightarrow{\Delta} \mathrm{~B}_2 \mathrm{O}_3 \xrightarrow[\Delta]{Y} B $$

Identify $X$ and $Y$ respectively.

A

HCl and Mg

B

C and Al

C

HCl and C

D

HCl and Sn

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