Structure of the Atoms Test

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Structure of the Atoms Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Anode rays are produced when

A
Cathode is perforated

B
anode is perforated

C
when low voltage is passed

D
when pressure is high
Question 2
1 / -0

Which of the following statement is always correct?

A
An atom has equal number of electrons and protons.

B
An atom has equal number of electrons and neutrons.

C
An atom has equal number of protons and neutrons.

D
An atom has equal number of electrons, protons and neutrons.
Question 3
1 / -0

The first model of an atom was given by

A
N. Bohr

B
E. Goldstein

C
Rutherford

D
J.J Thomson
Question 4
1 / -0

The relative atomic masses of many elements are not whole numbers because

A
of the presence of impurities.

B
they cannot be determined accurately.

C
of the existence of isotopes.

D
none of these.
Question 5
1 / -0

Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order.

(i) Rutherford’s atomic model

(ii) Thomson’s atomic model

(iii) Bohr’s atomic model

A
(i), (ii) and (iii)

B
(ii), (iii) and (i)

C
(ii), (i) and (iii)

D
(iii), (ii) and (i)
Question 6
1 / -0

In a sample of ethyl acetate, the two oxygen atoms have the same number of electrons but different number of neutrons. Which of the following is the correct reason for it?

A
One of the oxygen atoms has gained electrons.

B
One of the oxygen atoms has gained two neutrons.

C
The two oxygen atoms are isotopes.The two oxygen atoms are isobars.

D
The two oxygen atoms are isobars.
Question 7
1 / -0

In Rutherfod’s Gold foil experiment most of rays returns back to its path showing that

A
most of the atom is hollow

B
atoms have dense nucleus at the centre

C
atom is spherical

D
atom is neutral
Question 8
1 / -0

The valency of Al with atomic number 13 is

A
2

B
3

C
4

D
1

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Re-Attempt Weekly Quiz Competition

Structure of the Atoms Test - 4

Result

Structure of the Atoms Test - 4

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Question 1

Cathode is perforated

anode is perforated

when low voltage is passed

when pressure is high

Question 2

An atom has equal number of electrons and protons.

An atom has equal number of electrons and neutrons.

An atom has equal number of protons and neutrons.

An atom has equal number of electrons, protons and neutrons.

Question 3

N. Bohr

E. Goldstein

Rutherford

J.J Thomson

Question 4

of the presence of impurities.

they cannot be determined accurately.

of the existence of isotopes.

none of these.

Question 5

(i), (ii) and (iii)

(ii), (iii) and (i)

(ii), (i) and (iii)

(iii), (ii) and (i)

Question 6

One of the oxygen atoms has gained electrons.

One of the oxygen atoms has gained two neutrons.

The two oxygen atoms are isotopes.The two oxygen atoms are isobars.

The two oxygen atoms are isobars.

Question 7

most of the atom is hollow

atoms have dense nucleus at the centre

atom is spherical

atom is neutral

Question 8

2

3

4

1

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