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

Pick the correct statement.

I. Borax is white crystalline solid containing $\left[\mathrm{B}_4 \mathrm{O}_5(\mathrm{OH})_4\right]^{2-}$ units.

II. Aqueous solution of borax is acidic in nature.

III. Cobalt gives blue colour in borax bead test.

A

I and II

B

I and III

C

Only II

D

II and III

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

Which element does not show catenation property?

A

Si

B

Ge

C

Sn

D

Pb

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

Phosphine is prepared by the reaction of $\mathrm{P}_4$ with which of the following?

A

$\mathrm{H}_2 \mathrm{SO}_4$

B

$$NaOH$$

C

$\mathrm{H}_2 \mathrm{~S}$

D

$\mathrm{HNO}_3$

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

The most stable form of sulphur allotrope is

A

$\mathrm{S}_6$

B

$\mathrm{S}_7$

C

$\mathrm{S}_8$

D

$\mathrm{S}_{10}$

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