Tag: chemistry

Questions Related to chemistry

Which of the following is the tallest goat breed found in India?

chemistry materials of daily use wool - animal fibre wool fibres from animals

  1. Kanni aadu

  2. Kodi aadu

  3. Black Bengal

  4. Jamunapari

Show answer
Correct Option: A
Explanation:

Kanni aadu is the tallest goat breeds found in the Thirunelveli and Ramanadhapuram districts of Tamil Nadu. 

Which breed of Indian goats is known to produced Pashmina?

chemistry materials of daily use wool - animal fibre wool fibres from animals

  1. Osmanabadi

  2. Kodi aadu

  3. Changthangi

  4. Sirohi

Show answer
Correct Option: C
Explanation:

Changthangi goat is known to produce fibre used to prepare pashmina.

According to Dalton, what are the smallest particles of matter?

chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

  1. Molecules

  2. Ions

  3. Atoms

  4. None of the above

Show answer
Correct Option: C
Explanation:

-According to Dalton, atoms are the smallest particles of matter.

-When atoms combines together molecules are formed.
-When an atom looses or gains electron ions are formed.

Which of the following is not a postulate of Dalton's atomic theory?

chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

  1. All matter is made of very tiny particles called atoms

  2. Atoms of a given element are not identical in mass and chemical properties

  3. Atoms combine in a ratio of small whole numbers to form compounds

  4. The relative number and kinds of atoms are constant in a given compound

Show answer
Correct Option: B
Explanation:

The postulates of Dalton"s atomic theory may be stated as follows:
(i) All matter is made of very tiny particles called atoms.
(ii) Atoms of a given element are identical in mass and chemical properties.
(iii) Atoms of different elements have different masses and chemical properties.
(iv) Atoms combine in the ratio of small whole numbers to form compounds.
(v) The relative number and kinds of atoms are constant in a given compound.


So Atoms of a given element are not identical in mass or chemical properties.
This is not a Postulate of atomic theory.

Atoms combine with each other to ________ each other.

chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

  1. stabilize

  2. attain alkali metal configuration

  3. reduce their mass

  4. none of the above

Show answer
Correct Option: A
Explanation:

Atoms combine with each other to stabilize each other.


Hence the correct option is A.

According to Dalton's atomic theory, atoms combine in a small number ratio to form :

chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

  1. big atoms

  2. compounds

  3. elements

  4. ions

Show answer
Correct Option: B
Explanation:

According to Dalton's theory atoms combine in small number ratio to form compounds.

Which one of the following is not a subatomic particle?

chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

  1. Proton

  2. Neutron

  3. Electron

  4. Positron

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Correct Option: D
Explanation:

Positron is not a subatomic particle. Electrons, protons and neutrons are the subatomic particles.

John Dalton proposed which theory?

chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

  1. Theory of molecules

  2. Atomic mass theory

  3. Theory of atoms

  4. Law of conservation of substances

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Correct Option: C
Explanation:

John Dalton 1808, believed that matter is made up of extremely minute indivisible particles, called atoms which takes part in chemical reactions. These particle can neither be created nor be destroyed.

What are the merits of Dalton's atomic theory?

chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

  1. Explains laws of chemical combination

  2. Distinguishes between fundamental particles of element

  3. Both A and B

  4. Proves individuality

Show answer
Correct Option: C
Explanation:

The atomic theory explains the laws of chemical combination (the Law of Constant Composition and the Law of Multiple Proportions) Dalton was the first person to recognize a workable distinction between the fundamental particle of an element (atom) and that of a compound (molecule).

If combining atoms of a compound have nearly similar electronegativities the bond between them is_____

chemistry atoms, molecules and radicals history of atomic model atomic theory of dalton daltons atomic theory

  1. electrovalent

  2. covalent

  3. metallic

  4. ionic

Show answer
Correct Option: B
Explanation:

A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.
So, combining atoms of a compound have nearly similar electronegativities the bond between them is covalent.