10 self study question with answer--5

GK Quiz on Chemistry

Question 1

The nucleus of an atom consists of ________.

  electrons and neutrons

  electrons and protons

  protons and neutrons

  All of the above

It's 'protons and neutrons '
The nucleus is the small, dense region consisting of protons and neutrons atthe center of an atom. The atomic nucleus was discovered in 1911 by Ernest Rutherford.

Question 2

Anode rays were discovered by?

  J. Stoney

  Goldstein

  J.J. Thomson

  Rutherford

It's 'Goldstein '
An anode ray is a beam of positive ions that are created by certain types of gas discharge tubes. They were first observed in Crookes tubes during experiments by the German scientist Eugen Goldstein in 1886.

Question 3

The most electronegative element is________.

  Chlorine

  Bromine

  Florine

  Iodine

It's 'Florine '
The most electronegative element is Fluorine assigned a value of 4.Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

Question 4

The mass of electron as determined by J.J. Thomson is_______.

  9.1 X 10 ^-10gm

  9.1 X 10^-31 kg

  9.1 X 10^-18 gm

  9.1 X 10^-25 kg

It's '9.1 X 10^-31 kg '
The invariant mass of an electron is approximately 9.1 X 10 ^-31 kilograms.

Question 5

What is the elements present in urea______?

  C,H,O

  C,N,O

  C,N,H

  C,O,N,H

It's 'C,O,N,H '
Urea orcarbamide is an organic compound with the chemical formulaCO(NH₂)₂. The molecule has two —NH₂ groups joined by a carbonyl (C=O) functional group.

Question 6

Neutrons were discovered by?

  Faraday

  J.J. Thomson

  Chadwick

  Dalton

It's 'Chadwick '
Sir James Chadwick was an English physicist who was awarded the 1935 Nobel Prize in Physics for his discovery of the neutron in 1932.

Question 7

The inert gas abundantly found in widely distributed is_____?

  Xe

  Kr

  He

  Ar

It's 'Ar '
Argon (Ar) is the most prevalent of the noble gases in Earth's crust with the element composing 0.00015% of this crust.

Question 8

The M.K.S system was first introduced by______?

  Archimedes

  Eienstein

  Newton

  Giorgi

It's 'Giorgi '
The MKS system of units is a physical system of units that expresses any given measurement using fundamental units of the metre, kilogramme, and/or second (MKS). In 1901, Giovanni Giorgi proposed this unit.

Question 9

Which is not a type of elements?

  Metals

  Non Metals

  Metalloids

  Gases

It's 'Metalloids '
Element is a chemical substance consisting of atoms having the same number of protons in their atomic nuclei. The elements classified asmetalloids are boron, silicon, germanium, arsenic, antimony, tellurium and polonium.

Question 10

Which is used in preparation of dynamite?

  glycerol

  ethyl alcohol

  methyl alcohol

  glycol

It's 'glycerol '
Dynamite is an explosive material based on nitroglycerin, using diatomaceous earth or another adsorbent substance such as powdered shells or clay