Logical Sequence of Words Questions

A series is given, with one word missing. Choose the correct alternative from the given ones that will complete the series.
Oxygen, Toil, Arouse, Arson, Tenuous, ?

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.

AZ , CX , FU , ?

Arrange the given words in the sequence in which they occur in the dictionary.
i. Shortage
ii. Shore
iii. Shamelessly
iv. Shadiness
v. Shallow

Arrange the given words in the sequence in which they occur in the dictionary.
1. Xenons
2. Xylyls
3. Xanthic
4. Xenians
5. Xyst

Arrange the given words in the sequence in which they occur in the dictionary.
i. Claim
ii. Clearly
iii. Clerk
iv. Clerical

Arrange the given words in the sequence in which they occur in the dictionary.
i. Forehead
ii. Forensic
iii. Forest
iv. Foremost

A series is given, with one word missing. Choose the correct alternative from the given ones that will complete the series.

hello, lower, error, organ, tense, ?

From the given words, select the word which cannot be formed using the letters of the given word.
HUMBLING