TNPSC Group 1 Prelims 2025 Question Paper (15-June-2025)

Question 1

Which of statements are True? (i) Octane number increases with chain length. (ii) Cycloalkanes have higher Octane number than straight chain alkanes. (iii) Alkenes and aromatic hydrocarbon have higher Octane number than straight chain alkanes. (iv) Branched chain alkanes have lower octane number than straight chain alkanes.

Accepted Answer

(ii) and (iii)

Answer

(i) and (iv)

Answer

(i) and (ii)

Answer

(i), (ii), (iii) and (iv)

Answer

Answer not known

Question 2

Match the following hormone with the disorder caused :HormoneDisorder Caused(a) Insulin1. Cushing’s syndrome(b) Thyroxine2. Diabetes insipidus(c) Glucocorticoids3. Acromegaly(d) Growth hormone4. Goitre 5. Diabetes Mellitus

Accepted Answer

(a) 5 (b) 4 (c) 1 (d) 3

Answer

(a) 5 (b) 1 (c) 2 (d) 3

Answer

(a) 2 (b) 4 (c) 3 (d) 1

Answer

(a) 2 (b) 4 (c) 1 (d) 3

Answer

Answer not known

Question 3

Choose the right matches: (1) Carotenoid - C55H70O6N4Mg (2) Chlorophyll 'a' - C55H72O5N4Mg (3) Chlorophyll 'b' - C55H70O6N4Mg (4) Xanthophyll - C50H70O5Mg

Accepted Answer

(2) and (3) are correct

Answer

(1) and (2) are correct

Answer

(3) and (4) are correct

Answer

(1) and (4) are correct

Answer

Answer not known

Question 4

The Nobel Prize in Medicine was awarded to Victor Ambros and Gary Ruvkun for their discovery of

Accepted Answer

Micro RNA

Answer

Expression Sequence Tags

Answer

DNA micro array

Answer

SNP's

Answer

Answer not known

Question 5

Which of the following statements are true about crew selection and training for “Gaganyaan Mission”? (i) Crews are selected after clinical, psychological and aeromedical examination. (ii) Mission-specific training will be conducted at ISRO, Trivandrum. (iii) Selected astronauts will undergo their generic spaceflight training in Yuri Gagarin Cosmonaut training centre, Russia.

Accepted Answer

(i) and (iii) only

Answer

(i) and (ii) only

Answer

(ii) and (iii) only

Answer

(iii) only

Answer

Answer not known

Hormone	Disorder Caused
(a) Insulin	1. Cushing’s syndrome
(b) Thyroxine	2. Diabetes insipidus
(c) Glucocorticoids	3. Acromegaly
(d) Growth hormone	4. Goitre
	5. Diabetes Mellitus

TNPSC Group 1 Prelims 2025 Question Paper (15-June-2025)

TNPSC Group I Services Prelims 2025 Mock Test Series