CBSE Class 10 Science Periodic Classification of Elements- Online Test

Play the below CBSE Class 10 Chemistry Periodic Classification of Elements Quiz. Quiz Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have provided Surface Tension Class 11 Science MCQs Questions with Answers to help students understand the concept very well.

Check your knowledge in carbon and its compounds Class 10 Science by taking this online test.

1. Dobereiner could identify how many triads from the elements known at that time?
One
Two
Three
Four
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2. Upto which element, the law of octaves was found to be applicable?
Oxygen
Calcium
Cobalt
Potassium
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3. What type of oxide would Eka-aluminium form?
EO3
E3O2
E2O3
EO
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4. Which one of the following elements exhibit maximum number of valence electrons?
Na
Al
Si
P
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5. Choose the correct statement.
Valency and valence electrons are always equal.
Valency is determined by using the number of valence electrons.
Valence electrons are always equal to 8-valency.
Valency is always equal to 8-valence electrons.
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6. An element X is forming an acidic oxide. Its position in modern periodic table will be
Group 1 and period 3
Group 2 and period 3
Group 13 and period 3
Group 16 and period 3
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7. Which of the following gives the correct increasing order of the atomic radii of O, F and N?
O, F, N
N, F, O
O, N, F
F, O, N
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8. Which of the following statements is incorrect for atomic size?
Atomic size of B > Be
Atomic size of Be > B
Atomic size of N > O
Atomic size of C > N
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9. Which of the following statements is not a correct statement about the trends when going from left to right across the periods of periodic table?
The elements become less metallic in nature
The number of valence electrons increases
The atoms lose their electrons more easily
The oxides become more acidic
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10. An oxide of a metal shows no action with blue-litmus but turns red-litmus to blue in its aqueous solution. The possible formula of the metal oxide can be
MgO
CO2
SO2
H2O
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