1
AP EAPCET 2022 - 4th July Evening Shift
+1
-0

The empirical formula of calgon is

A
$$\mathrm{Na}_2 \mathrm{PO}_3$$
B
$$\mathrm{NaP}_2 \mathrm{O}_3$$
C
$$\mathrm{NaPO}_3$$
D
$$\mathrm{Na}_3 \mathrm{PO}_3$$
2
AP EAPCET 2022 - 4th July Morning Shift
+1
-0

The statement related to law of definite proportions is

A
the ratio of oxygen in $$\mathrm{H}_2 \mathrm{O}$$ and $$\mathrm{H}_2 \mathrm{O}_2$$ with respect to fixed mass of hydrogen atom is a whole number.
B
% of oxygen in $$\mathrm{H}_2 \mathrm{O}$$ is constant irrespective of the source.
C
equal volume of all gases at the same temperature and pressure should contain equal number of molecules.
D
matter can neither be created nor destroyed.
3
AP EAPCET 2022 - 4th July Morning Shift
+1
-0

What are $$x$$ and $$y$$ in the following reaction?

$$x \mathrm{~Pb}_3 \mathrm{O}_4 \longrightarrow y \mathrm{PbO}+\mathrm{O}_2$$

A
$$x=3, y=6$$
B
$$x=2, y=4$$
C
$$x=2, y=5$$
D
$$x=2, y=6$$
4
AP EAPCET 2021 - 20th August Morning Shift
+1
-0

An alloy of metals X and Y weighs 12 g and contains atoms X and Y in the ratio of 2 : 5. The percentage of metal X in the alloy is 20 by mass. If the atomic mass of X is 40 amu what is the atomic mass of metal Y ?

A
64 amu
B
32 amu
C
60 amu
D
50 amu
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