Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

A food Calorie (written with a capital C) equals which amount of energy?

1. A1 kilojoule (1000 J)
2. B1 joule
3. C1 kilocalorie
4. D1 calorie

What is a single covalent bond?

1. AOne electron transferred from one atom to another
2. BThe attraction between two oppositely charged ions
3. COne pair of electrons shared between two atoms
4. DTwo pairs of electrons shared between two atoms

What is the half-life of a radioactive isotope?

1. AHalf the time it takes for all the atoms to decay
2. BThe time taken for half of the radioactive atoms in a sample to decay
3. CThe time taken for the mass of a sample to double in size
4. DHalf the number of protons in the nucleus

Radioactive iodine (iodine-131) is used to treat some thyroid conditions. Why does it reach the thyroid?

1. AIodine is strongly attracted to the metal ions stored in the neck
2. BRadiation is always drawn toward the head
3. CThe thyroid gland takes up iodine to make its hormones
4. DIodine-131 is not radioactive inside the body

Hangi değişiklik bir parça tebeşirin asitle daha hızlı tepkime vermesini sağlar?

1. ATebeşiri toz hâline getirmek
2. BTek büyük bir tebeşir parçası kullanmak
3. CAsidi buzdolabında soğutmak
4. DAsidi daha fazla suyla seyreltmek

Which coefficients balance __Na + __Cl₂ → __NaCl?

1. A1, 2, 1
2. B1, 1, 1
3. C2, 1, 2
4. D2, 2, 1

A sealed bag of crisps (potato chips) packed at sea level looks puffed up when it is carried to a high mountain. Why?

1. AThe gas inside the bag is heated strongly by the mountain sunlight
2. BMore gas is produced by the crisps at altitude
3. CThe outside air pressure is lower, so the gas inside expands
4. DThe bag becomes thinner and weaker at altitude

What is a triglyceride made of?

1. AThree glucose molecules joined together
2. BOne glycerol molecule joined to three fatty acids
3. CThree amino acids joined by peptide bonds
4. DOne fatty acid joined to three glycerol molecules