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Father of Periodic tablePeriodic table was discovered by-
Dmitri Mendeleev

Father of Modern Periodic table-
Moseley

Periodic law was put forward by-
Dmitri Mendeleev

Modern Periodic law was put forward by-
Moseley

Atomic number of elements were discovered by-
Moseley

Periodic table of Mendeleev was based on increasing order of-
Atomic mass

Refraction is the change in direction of a wave passing from one medium to another or from a gradual change in the medium.

Refraction is the fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.

Denatured spirit is a mixture of ethyl alcohol, methyl alcohol and pyridine.
Pyridine is a basic heterocyclic organic compound with the chemical formula C5H5N.
It is structurally related to benzene, with one methine group (=CH-) replaced by a nitrogen atom.
Pyridine is added to ethanol make it poisonous, bad-tasting, foul-smelling, or nauseating to discourage its recreational consumption.

The International System of Units is the modern form of the metric system, and is the
most widely used system of measurement.

2.It comprises a coherent system of units of measurement built on seven base units,
which are the second, metre, kilogram, ampere, kelvin, mole, candela, and a set of twenty prefixes to the unit names and unit
symbols that may be used when specifying multiples and fractions of the units.

3.The system also specifies names for 22 derived units, such as lumen and watt, for
other common physical quantities.

Moriculture: Cultivation of mulberry plants for harvsting the leaves to be used for the sikworms. Sericulture is dependent on moriculture.

-Dolomite is an anhydrous carbonate mineral composed of calcium magnesium carbonate,
Ca Mg(CO3)2.

The term is also used for a sedimentary carbonate rock composed mostly of the mineral dolomite.

-An alternative name sometimes used for the dolomite rock type is lodestone.

-The brain stem controls the flow of messages between the brain and the rest of the body

-Also controls basic body functions such as breathing, swallowing, heart rate, blood pressure, consciousness,

-whether one is awake or sleepy. The brain stem consists of the mid brain, pons, and medulla oblongata.

Systematic errors are regularly repetitive in nature.
Systematic errors are errors that are not determined by chance but are introduced by an inaccuracy (involving either the observation or measurement process) inherent to the system.
Systematic error may also refer to an error with a non-zero mean, the effect of which is not reduced when observations are averaged.

Reduction is a process which involves; removal of oxygen, addition of hydrogen, removal of non-metal, addition of metal, decrease in +ve valency, gain of electrons and decrease in oxidation number.

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