For arrears, yes. see links below
The State can place a lien on an IRA to collect child support arrearages, yes.
yes
yes
yup
In Illinois, a Roth IRA is generally protected from garnishment by creditors. However, there are exceptions, such as for certain types of debts like unpaid taxes or child support. It's important to consult with a legal expert to understand the specific circumstances and any potential risks related to garnishment of retirement accounts.
Yep
yup
No, your salary cannot be garnished to pay the debt of another, UNLESS you have contracted to pay that debt. Now, that being said, any assests such as bank accounts, stocks, bonds, Certificates of Deposit, IRA's, etc. that represent mixed assetts of you and your husband can be attached for the solution of a debt, especially child support.
They can sometimes...you would need to check with your state laws to see.
In California, the garnishment limit for Individual Retirement Accounts (IRAs) is generally protected from creditors. Under California law, IRAs are exempt from garnishment to the extent that they are necessary for the support of the debtor and their dependents. However, if the IRA is being garnished due to specific debts, such as child support or taxes, different rules may apply. It's always advisable to consult with a legal expert for guidance in specific situations.
In Illinois, yes, even if the child support obligor transfers his IRA into a new spouse's name. See Takata v Hafley at http://www.state.il.us/court/Opinions/AppellateCourt/2008/3rdDistrict/June/3070175.pdf
yup