alleryVitamin B9 is better known by which name?
- Folic acid
- Biotin
- Niacin
- Riboflavin
Show answer and solution
Correct answer: A. Folic acid
Folic acid is vitamin B9, and its deficiency is tied to neural tube defects.
RRB NTPC Science & Technology — practice questions — page 3
Explore 82 free Science & Technology questions in RRB NTPC Science. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 61–82 of 82.
Vitamin B9 is better known by which name?Read the answer and worked solution →Vitamin K is closely involved in which body process?Read the answer and worked solution →What colour change do aqueous acids cause in blue litmus?Read the answer and worked solution →Vinegar is a dilute aqueous solution of which acid?Read the answer and worked solution →An acidic aqueous solution has a pH value of what?Read the answer and worked solution →In 1884 Arrhenius linked acidity to which ion in water?Read the answer and worked solution →According to Lewis, an acid is a substance that does what?Read the answer and worked solution →Which acid is the most widely used in industry?Read the answer and worked solution →Which acid is used as the electrolyte in a car battery?Read the answer and worked solution →Removing rust from metals using acids is known as what?Read the answer and worked solution →Nitric acid reacting with ammonia gives which common fertilizer?Read the answer and worked solution →What defines a strong acid in water?Read the answer and worked solution →Phosphoric acid, H3PO4, is an example of which type of acid?Read the answer and worked solution →In 1912, which Polish biochemist coined the word 'vitamine' from 'vital amine'?Read the answer and worked solution →In 1747, which Scottish naval physician discovered that citrus fruits prevent scurvy?Read the answer and worked solution →Who shared the 1929 Nobel Prize in Physiology with Frederick Hopkins for discovering vitamins?Read the answer and worked solution →Which cartilaginous flap folds downward during swallowing to keep food from entering the trachea?Read the answer and worked solution →What is the hardest anatomical tissue in the human body that coats the crown of teeth?Read the answer and worked solution →Which specialized glands located in the duodenum secrete protective bicarbonate-rich mucus?Read the answer and worked solution →Under the Brønsted–Lowry concept, an acid is fundamentally defined as a donor of which particle?Read the answer and worked solution →Which organic acid is an abundant natural constituent found in tamarind and unripe mangoes?Read the answer and worked solution →Which dicarboxylic acid is naturally present in significant amounts in spinach and tomatoes?Read the answer and worked solution →
Worked practice questions
Vitamin K is closely involved in which body process?
- Vision in dim light
- Blood clotting
- Bone hardening
- Iron absorption
Show answer and solution
Correct answer: B. Blood clotting
It is intimately involved in the coagulation of blood after a wound.
What colour change do aqueous acids cause in blue litmus?
- It stays blue
- It turns green
- It turns red
- It turns yellow
Show answer and solution
Correct answer: C. It turns red
Acids in water turn blue litmus red and taste sour.
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