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Question 12
Question: When a fuse is rated 8 A, it means _____________. 1. it will not work if current is less than 8 A 2. it has a resistance of 8 W 3. it will work only if current is 8 A 4. it will melt if current exceeds 8 A Answer: ..
Question 12
Question: The component of a chromosome that controls heredity is ____. 1. proteins 2. histones 3. DNA 4. RNA Answer: ..
Question 12
Question: Which of the following devices works on the principle of electromagnetic induction? 1. Ammeter 2. Voltmeter 3. Generator 4. Galvanometer Answer: ..
Question 12
Question: The first alkali metal is _________. 1. hydrogen 2. lithium 3. sodium 4. francium Answer: ..
Question 12
Question: The power of a convex lens of focal length 50 cm is ______. 1. + 2D 2. - 2D 3. 50 D 4. - 5D Answer: ..
Question 12
Question: The source of oxygen for the aquatic animals is _________. 1. atmosphere 2. water 3. soil 4. none of the above Answer: ..
Question 12
Question: Minerals are absorbed into the cells by _____________. 1. osmosis 2. diffusion 3. active transport 4. a, b or c Answer: ..
Solution:
Atomic number = 12Number of protons = number of electrons = atomic number = 12..
Molecular Mass and Mole Concept
The molecular mass of a substance is the relative mass of its molecule as compared with the mass of a 12C atom taken as 12-unit..
Structure of Atom
. In 1793, he left for Manchester to teach physics and chemistry in a college. In 1801, he observed and discovered the law of expansion of gases on heating. He also enunciated the law of partial pressures and found methods of determining vapour pressure of gases. He invented the dew point hygromete..
. In 1793, he left for Manchester to teach physics and chemistry in a college. In 1801, he observed and discovered the law of expansion of gases on heating. He also enunciated the law of partial pressures and found methods of determining vapour pressure of gases. He invented the dew point hygromete..See what our Users say :
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