Explanation:
Foliated metamorphic rocks such as gneiss, phyllite, schist and slate have a layered or banded appearance that is produced by exposure to heat. Non Foliated rocks such as hornfels, marble and quartzite does not have a layered or banded appearance
Answer:
Polybutene exists in two isomeric forms depending on where the carbon double bond is positioned in the monomer molecule. If it is between the first and second carbon atoms in a linear molecule, then the chemically accurate name of the resulting polymer is polybutene-1.
The correct option is D.
Mole is a measurement used in chemistry which allows us to measure out the same quantity of matter in different substances. Mole allows scientist to measure two substances, for instance, magnesium and sodium, which have equal amount of atoms. Thus, a mole of magnesium contains the same number of atoms as a mole of sodium.
In this question we are asked to round off the figure 0.02056 to three significant figures.
We are given with four options to chose best out of four
a) 0.0205
b) 0.0206
c) 0.021
d) 0.020
In this question, option (b) is correct i.e. 0.0206.
There are four significant rules, we should keep in mind during round off:
- Non-zero digits are so significant
- Zeros between two non-zero digits are significant
- Leading zeros are not significant
- Trailing zeros are important only if the number contains a decimal point
To know more about Round off:
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