1
AP EAPCET 2022 - 5th July Morning Shift
+1
-0

50 g of a substance is dissolved in 1 kg of water at $$+90^{\circ} \mathrm{C}$$. The temperature is reduced to $$+10^{\circ} \mathrm{C}$$. The density is increased from 1.1 to $$1.15 \mathrm{~g} \mathrm{~cc}^{-1}$$. What is the % change of molarity of the solution?

A
10
B
4.5
C
5
D
7.3
2
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
$$\mathrm{Na}_3 \mathrm{PO}_3$$
3
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.
4
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
$$x=2, y=6$$
EXAM MAP
Medical
NEET