Where are my trousers? Or Where is my trousers?

English as a Second Language English for Beginners
1

Hi, Trousers/shoes/pants - for these nouns, i would like to confirm the following questions are correct or not.

Where are my trousers? Or Where is my trousers?
Where are my shoes? Or Where is my shoes?

2

.
Where are my trousers/pants/shoes/scissors/glasses?
.

3

Thanks very much! That is my wonder.