1. Smaller particles in atom are called ________
a) Atomic Particles
b) Sub-atomic particles
c) Smaller Particles
d) Neutral Particles
Discussion
Explanation: Sub atomic particles are any of numerous subatomic constituents of the physical world that interact with each other, including electrons, neutrinos, photons, and alpha particles
2. Most part of the atom is _______
a) Empty
b) Filled
c) Charged
d) Covered
Discussion
Explanation: Major part of the atom is void. Nucleus carries proton and neutron responsible for most of the weight of the atom.
3. Number of Protons and electrons in an atom are _______
a) Different
b) Same
c) Average
d) Constant
Discussion
Explanation: An atom has an equal number of protons and electrons.
4. An electric field deflects beams of _______
a) Protons
b) Electrons
c) Neutrons
d) Protons and electrons
Discussion
Explanation: An electric field deflects the beams of both positively charged protons and negatively charged electrons.
5. True about cow’s milk are all except:
a) Cow’s milk contains 80% whey protein not casein
b) Cow milk has less carbohydrate than mother’s milk
c) Has more K+ and Na+ than infant formula feeds
d) Has more protein than breast milk
Discussion
Explanation: Cow milk has less carbohydrate than mother’s milk; cow milk has more K+ and Na+ than infant formula feeds and cow milk has more protein than breast milk are all false
6. What is the moisture content of cow milk?
a) 30%
b) 50%
c) 83%
d) 90%
Discussion
Explanation: Cows’ milk consists of about 87% water and 13% dry substance. It is considered to have elements of a complete balanced diet
7. What is the fat percentage of cow milk?
a) 9%
b) 10%
c) 15%
d) 4%
Discussion
Explanation: Cow milk has 4% fat percent. It has an SNF (Solid not Fat) 8.5-9%. Rest is water
8. Milk is an emulsion of _____ in water.
a) Oil
b) Water
c) Soap
d) Dirt
Discussion
Explanation: Milk is a suspension of droplets of one liquid in another. Milk is an emulsion of fat in water
9. In milk, the whey proteins are in _____ solution and the casein in colloidal suspension.
a) Water
b) Colloidal
c) Fat
d) Gas
Discussion
Explanation: Colloidal suspension constitutes of casein and Colloidal solution constitutes of whey proteins. They together make up milk
10. Approximate size of fat globules in milk solution is ______________
a) 10–2 to 10–3
b) 10–4 to 10–5
c) 10–5 to 10–6
d) 10–6 to 10–7
Discussion
Explanation: Size of fat globules in milk solution is 10–2 to 10–3. Fat is bound in the globular form by phospholipids membranes, which are hydrophobic.