उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

Which group of biological molecules includes fats, oils and cholesterol?

1. ALipids
2. BCarbohydrates
3. CProteins
4. DNucleic acids

Which of these is a chemical property?

1. ABoiling point
2. BDensity
3. CColour
4. DFlammability

Which group contains the alkaline earth metals, such as magnesium and calcium?

1. AGroup 2
2. BGroup 1
3. CGroup 17
4. DGroup 18

A red blood cell is placed in pure water (a hypotonic solution). What happens?

1. AWater leaves the cell, which shrinks and wrinkles
2. BWater enters the cell, which swells and may burst
3. CSalt enters the cell, which shrinks
4. DNothing happens to the cell

A radioactive isotope has a half-life of 5 days. A sample starts with 80 g. How much is left after 10 days?

1. A0 g
2. B20 g
3. C10 g
4. D40 g

कौन-सा कथन प्रबल अम्ल का वर्णन करता है?

1. Aउसका pH 7 से अधिक होता है
2. Bवह हाइड्रोजन आयनों को केवल आंशिक रूप से छोड़ता है
3. Cवह पानी में पूर्णतः आयनित हो जाता है
4. Dवह हमेशा अत्यधिक सांद्र होता है

Starch and cellulose are both made entirely of glucose units, yet humans can digest starch but not cellulose. Why?

1. ACellulose dissolves in water, so it is lost from the gut
2. BStarch contains nitrogen, which makes it easier to digest
3. CThe glucose units are linked differently, and humans lack an enzyme to break cellulose's links
4. DCellulose is really made of amino acids, not glucose, so stomach acid cannot break it

A sealed rigid can holds gas at 2 atm and 27 °C. It is heated to 327 °C. What is the new pressure?

1. A2.4 atm
2. B24 atm
3. C1 atm
4. D4 atm