General Science MCQs for all OSSC Competitive Exams

General Science MCQs for OSSC exams cover a wide range of topics, including physics, chemistry, biology, and environmental science. By studying these MCQs, candidates can improve their chances of success in the OSSC competitive exams.

  1. Larynx is called: –

A. Voice box
B. Music box
C. Respiratory organ
D. None of these

Answer: A

  1. The egg is

A. Egg gamete
B. Female gamete
C. Both of these
D. None of these

Answer: B

  1. Thyroxin produced by

A. Pituitary gland
B. Adrenal gland
C. Thyroid gland
D. Testes

Answer: C

  1. There are ______ pairs of chromosomes in human cell.

A. 23
B. 46
C. 22
D. All are wrong

Answer: A

  1. Initially girls grow ______ than boys.

A. Faster
B. Slower
C. Both of these
D. None of these

Answer: A

  1. The period of maturity of reproductive organs is called.

A. Adolescene period
B. adulthood
C. Gestation period
D. None of these

Answer: A

  1. Fertilisation is called

A. To produce sperm
B. To produce eggs
C. Fusion of sperms and eggs
D. All of these

Answer: C

  1. Puberty age in females is

A. 10-12
B. 12-14
C. 8-10
D. More than 14 years

Answer: A

  1. The number of chromosomes is present in human cell: –

A. 22
B. 23
C. 24
D. 46

Answer: D

  1. The male hormone is

A. Estragon
B. Projestrone
C. Testosterone
D. All of these

Answer: C

  1. Highest percentage of air consists of

A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Argon

Answer: C

  1. The Taj Mahal is being affected by

A. Noise pollution
B. Air pollution
C. Water pollution
D. None of these

Answer: B

  1. Most polluted river in the world is

A. Yamuna
B. Cavery
C. Chepat
D. Ganga

Answer: D

  1. Air pollution causes

A. Global warming
B. Respiratory problems
C. Soil erosion
D. None of these

Answer: B

  1. The percentage of nitrogen in the air is

A. 21%
B. 78%
C. 87%
D. 70%

Answer: C

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