How to get spare no from categories 1 table where not exist per same s

Question

How to get spare no from categories 1 table where not exist per same spare no on table categories 2?

so i need to make select statement query select spare no from table categories 1 that have different categories
on table categories 2 per same spare no

as example spare no 1350 have category 5902 on table categories1 but on table categories2
i have same same spare no 1350 but have different categories as 7090 and 4020
then i select or display this spare no from table categories 1

as example spare no 1200 have category 5050 on table categories1 but on table categories2
i have same same spare no 1200 but have same categories as 5050 on table categories 2
so i don't need it or don't need to display it because it exist same sapre no and same category on table categories 2

so How to make select query give me expected result below ?

create table #categories1
 (
 catId int identity(1,1),
 SpareNo int,
 CategoryId int,
 )
 insert into #categories1(SpareNo,CategoryId)
 values
 (1200,5050),
 (1350,5902),
 (1700,8070),
 (1990,2050),
 (7000,2030)

 create table #categories2
 (
 catId int identity(1,1),
 SpareNo int,
 CategoryId int,
 )
 insert into #categories(SpareNo,CategoryId)
 values
 (1200,5050),
 (1200,5090),
 (1200,5070),
 (1350,7090),
 (1350,4020),
 (1700,8612),
 (1990,7575),
 (1990,2050),
 (7000,4200),
 (7000,4500)


expected result :
catId SpareNo CategoryId
2      1350    5902
3      1700    8070
5      7000    2030