There are 28 states and 7 union territories in India

Up to my knowledge the Gk questions asked in competative exams like banking, government exams are like this.....

Pondicherry does not share its boundary with which state?
Ans for this: Pondicherry only Share its Boundary with Andhra Pradesh, Tamilnadu and Kerala

so we have mainly focused on some special things like.
 Size of States/ Union Territories ( ie, Which is smallest, which is biggest? )

List of Indian states and union territories by area

Rank	State	Area (km²)[4]	Region	Comparable country
1	Rajasthan	342,239	Hindi Belt	Republic of the Congo
2	Madhya Pradesh	308,245	Hindi Belt	Oman
3	Maharashtra	307,713	Western	Italy
4	Andhra Pradesh	275,045	Southern	New Zealand
5	Uttar Pradesh	240,928	Hindi Belt	 United Kingdom
6	Jammu and Kashmir	222,236	Northern	Ghana
7	Gujarat	196,024	Western	Senegal
8	Karnataka	191,791	Southern	Syria
9	Odisha	155,707	Eastern	Bangladesh
10	Chhattisgarh	135,191	Hindi Belt	Greece
11	Tamil Nadu	130,058	Southern	England
12	Bihar	94,163	Hindi Belt	South Korea
13	West Bengal	88,752	Eastern	Jordan
14	Arunachal Pradesh	83,743	Eastern	United Arab Emirates
15	Jharkhand	79,714	Hindi Belt	Czech Republic
16	Assam	78,438	Eastern	Ireland
17	Himachal Pradesh	55,673	Hindi Belt	Sri Lanka
18	Uttarakhand	53,483	Hindi Belt	Bosnia and Herzegovina
19	Punjab	50,362	Northern	Denmark
20	Haryana	44,212	Hindi Belt	Switzerland
21	Kerala	38,863	Southern	Netherlands
22	Meghalaya	22,429	Eastern	El Salvador
23	Manipur	22,327	Eastern	Belize
24	Mizoram	21,081	Eastern	Slovakia
25	Nagaland	16,579	Eastern	Kuwait
26	Tripura	10,486	Eastern	Lebanon
27	Andaman and Nicobar Islands	8,249	Southern	Puerto Rico
28	Sikkim	7,096	Eastern	Puerto Rico
29	Goa	3,702	Western	Luxembourg
30	Delhi	1,483	Hindi Belt	Mauritius
31	Puducherry	479	Southern	Andorra
32	Dadra and Nagar Haveli	491	Western	Seychelles
33	Chandigarh	114	Hindi Belt	Wallis and Futuna
34	Daman and Diu	112	Western	Jersey
35	Lakshadweep	32	Southern	Macau
Total area	India	3,287,263