Question 21 : The electron dot formula for AsCl₃ shows:
1. three single bonds and 10 lone-pairs
2. a total of 84 electron dots
3. one single bond, two double bonds, and 8 lone-pairs
4. two single bonds, one double bond, and 9 lone-pairs
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Question 22 : Which of the following covalent bonds has the greatest polarity?
1. Na – I
2. S – O
3. C – O
4. Na – Br
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Question 23 : The number of lone electron pairs in the N2 molecule is ___.
1. 1
2. 2
3. 3
4. 4
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Question 24 : Which one of the compounds below is most likely to be ionic?
1. NO₂
2. SrBr₂
3. GaAs
4. CBr₄
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Question 25 : Classify the O – H bond in CH₃OH as ionic, polar covalent, or nonpolar covalent.
1. ionic
2. polar covalent
3. nonpolar covalent
4. None of this
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Question 26 : Which one of the following is a polar covalent bond?
1. Si– Si
2. Cl– Cl
3. Ca– Cl
4. P– Cl
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Question 27 : What type of chemical bond holds the atoms together within a water molecule?
1. ionic bond
2. nonpolar covalent bond
3. polar covalent bond
4. hydrogen bond
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Question 28 : Which of the atoms listed below is the most electronegative?
1. P
2. Cs
3. As
4. Li
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Question 29 : Which pair of elements would be most likely to form an ionic compound?
1. Cl and I
2. Al and K
3. C and S
4. Cl and Mg
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Question 30 : In which of the following compounds are hydrogen bonds between molecules the strongest?
1. HF
2. HCl
3. HBr
4. HI
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