1
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

In which of the following, elements are arranged in the correct order of their electron gain enthalpies?

A
$$\mathrm{F}>\mathrm{S}>\mathrm{O}>\mathrm{N}$$
B
$$\mathrm{F}>\mathrm{O}>\mathrm{S}>\mathrm{N}$$
C
$$\mathrm{F}>\mathrm{O}>\mathrm{N}>\mathrm{S}$$
D
$$\mathrm{F}>\mathrm{N}>\mathrm{O}>\mathrm{S}$$
2
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

In second period of the long form of the periodic table an element $$X$$ has second lowest first ionisation enthalpy and element $$Y$$ has second highest first ionisation enthalpy values. What are $$X$$ and $$Y$$ ?

A
B, F
B
Be, Ne
C
Be, O
D
C, O
3
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

The set of molecules in which the central atom is not obeying the octet rule is

A
$$\mathrm{CO}_2, \mathrm{SiH}_4, \mathrm{BeCl}_2$$
B
$$\mathrm{H}_2 \mathrm{O}, \mathrm{Cl}_2 \mathrm{O}, \mathrm{CO}_2$$
C
$$\mathrm{CH}_4, \mathrm{NH}_3, \mathrm{OF}_2$$
D
$$\mathrm{SF}_6, \mathrm{PCI}_5, \mathrm{XeF}_2^2$$
4
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

The formal charges of atoms (1), (2) and (3) in the ion AP EAPCET 2022 - 4th July Evening Shift Chemistry - Chemical Bonding and Molecular Structure Question 3 English is

A
0, +2, $$-$$1
B
0, +1, 0
C
+2, 0, $$-$$1
D
+1, 0, 0
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