Which of the following molecules has an axis | vedclass

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(D) An axis of symmetry $(AOS)$ is a line about which rotation by $360^{\circ}/n$ results in an identical orientation. $A$ plane of symmetry $(POS)$ i

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All of these

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(D) An axis of symmetry $(AOS)$ is a line about which rotation by $360^{\circ}/n$ results in an identical orientation. $A$ plane of symmetry $(POS)$ is a plane that divides a molecule into two mirror-image halves.$1$. Formaldehyde $(HCHO)$: It has a $C_2$ axis of symmetry passing through the $C=O$ bond and a plane of symmetry containing the atoms.$2$. $1,3$-Dichlorobenzene: It has a $C_2$ axis of symmetry and a plane of symmetry passing through the ring.$3$. Dichloromethane $(CH_2Cl_2)$: It has a $C_2$ axis of symmetry and a plane of symmetry.Since all the given molecules possess both an axis of symmetry and a plane of symmetry,the correct option is $D$.

Order	Property
$(A)$ $NO_2 > O_3 > H_2O$	Bond angle
$(B)$ $H_2O > HF > NH_3$	Dipole moment
$(C)$ $I_2 > F_2 > N_2$	Bond length

Which of the following molecules has an axis of symmetry and a coaxial plane of symmetry?

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Observe the following statements:
$i$. The dipole moment of $NH_3$ is higher than the dipole moment of $NF_3$.
$ii$. The dipole moment of chloroform $(CHCl_3)$ is zero.
$iii$. Covalent bond character in $NaCl$ is more compared to $CuCl$.

The correct order of bond enthalpy of given molecules is

Which of the following species are isoelectronic?
$I. CH_3^+$
$II. NH_2^-$
$III. NH_4^+$
$IV. NH_3$

Consider the following pairs:
Order Property
$(A)$ $NO_2 > O_3 > H_2O$ Bond angle
$(B)$ $H_2O > HF > NH_3$ Dipole moment
$(C)$ $I_2 > F_2 > N_2$ Bond length

Which of the above pairs are correctly matched?

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