The bond angles marked a, b, and c in the molecule below are about ___, ___, and

Question

The bond angles marked a, b, and c in the molecule below are about ___, ___, and ___, respectively. 120 degree, 109.5 degree, 109.5 degree 109.5 degree, 120 degree, 120 degree 90 degree 90 degree 90 degree 109.5 degree, 120 degree, 90 degree 109.5 degree 109.5 degree, 109.5 degree Based on periodic trends, which bond is the most polar? Al-Cl Si-Cl P-Cl s_Cl Cl-Cl Of the molecules below, which one is polar? CO_2 SbF_5 AsH_3 I_2 SO_3 Based on periodic trends, which of the following covalent bonds is expected to be the shortest? Te-Te Si-Si Ge-Ge Se-Se S-S Which of the following has dispersion forces as its only intermolecular force? CH_3Cl CH_4 HCI C_6H_13NH_2 NaCl

Explanation / Answer

21] B

a - sp3 hybridisarion - pyramidal - 109.5

b -sp2 - planar - 120

c - sp2 - planar - 120

22] A

The difference between the electronegativities of atoms is more, then the bond is more polar

Al is less electronegative than Si,S,P

23] C

AsH3 ---- this has 2 nonbonding electrons, which causes the molecule to have a net dipole moment.

24] E

Across period radius decreases

And group radius increases

25] B

Only Alkanes are having dispersion forces as its only intermolecular force

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