1
AP EAPCET 2021 - 20th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

The main constituent of enamel on the surface of teeth is

A
$$\left[3 \mathrm{Ca}_3\left(\mathrm{PO}_4\right)_2 \cdot \mathrm{CaF}_2\right]$$
B
$$\left[\mathrm{Ca}_3\left(\mathrm{PO}_4\right)_2 \cdot \mathrm{H}_2 \mathrm{O}\right]$$
C
$$\left[3 \mathrm{Ca}_3\left(\mathrm{PO}_4\right)_2 \cdot \mathrm{Ca}(\mathrm{OH})_2\right]$$
D
$$\mathrm{CaF}_2$$
2
AP EAPCET 2021 - 20th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following does not form double salts?

A
Li$$_2$$SO$$_4$$
B
Na$$_2$$SO$$_4$$
C
K$$_2$$SO$$_4$$
D
Rb$$_2$$SO$$_4$$
3
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

In the preparation of baking soda, H$$_2$$O and CO$$_2$$ in ratio ......... is used to react with Na$$_2$$CO$$_3$$.

A
3 : 1
B
1 : 2
C
2 : 1
D
1 : 1
4
AP EAPCET 2021 - 19th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which metal oxide among the following gives H$$_2$$O$$_2$$ on treatment with dilute acid?

A
BaO$$_2$$
B
RbO$$_2$$
C
MnO$$_2$$
D
Al$$_2$$O$$_3$$

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