Very Short Answer Questions (1 Mark each)
Chemistry Quiz Challenge
Test your knowledge of chemistry concepts with our engaging quiz! This quiz consists of carefully crafted multiple-choice questions that cover various fundamental topics in chemistry.
Key Features:
- Simple and interactive format
- Immediate feedback on answers
- Broad range of chemistry topics
An element X with atomic number 12 forms a compound with element Y with atomic number 17. The formula of the compound formed is?
XY
XY2
X2Y
X2Y3
An element X is forming acidic oxide. Its most probable position in the modern periodic table is?
Group 1 and Period 3
Group 16 and Period 3
Group 17 and Period 3
Group 2 and Period 3
Crop fields are known as _________ ecosystem as they are man made and consist of biotic and abiotic components.
Artificial
Natural
Agricultural
Industrial
Fusion of one male gamete with ovule and one male gamete with the polar nuclei is called _______.
Single fertilization
Double fertilization
Triple fertilization
Half fertilization
Calcium oxide reacts vigorously with water to produce slaked lime.
CaO (s) + H2O (l) → Ca(OH)2 (aq)
This reaction can be classified as: (A) Combination reaction (B) Exothermic reaction (C) Endothermic reaction (D) Oxidation reaction
(A) and (C)
(C) and (D)
(A), (C) and (D)
(A) and (B)
Assertion (A) : At high temperatures, metal wires have a greater chance of short circuiting. Reason (R) : Both resistance and resistivity of a material vary with temperature.
Both (A) and (R) are true and (R) is the correct explanation of the assertion (A).
Both (A) and (R) are true, but (R) is not the correct explanation of the assertion (A).
(A) is true, but (R) is false.
(A) is false, but (R) is true.
Around the year 1800, only 30 elements were known. Dobereiner in 1817 and Newlands in 1866 tried to arrange the then known elements and framed laws which were rejected by the scientists. Even after the rejection of the proposed laws, many scientists continued to search for a pattern that correlated the properties of elements with their atomic masses.
The main credit for classifying elements goes to Mendeleev for his most important contribution to the early development of a Periodic table of elements wherein he arranged the elements on the basis of their fundamental property, the atomic mass and also on the similarity of chemical properties. The formulae of their hydrides and oxides were treated as basic criteria for the classification of the elements.
However, Mendeleev’s classification also had some limitations as it could not assign the position to isotopes. He also left some gaps in the periodic table.
Around the year 1800, only 30 elements were known. Dobereiner in 1817 and Newlands in 1866 tried to arrange the then known elements and framed laws which were rejected by the scientists. Even after the rejection of the proposed laws, many scientists continued to search for a pattern that correlated the properties of elements with their atomic masses.
The main credit for classifying elements goes to Mendeleev for his most important contribution to the early development of a Periodic table of elements wherein he arranged the elements on the basis of their fundamental property, the atomic mass and also on the similarity of chemical properties. The formulae of their hydrides and oxides were treated as basic criteria for the classification of the elements.
However, Mendeleev’s classification also had some limitations as it could not assign the position to isotopes. He also left some gaps in the periodic table.
If the letter ‘R’ was used to represent any of the elements in the group, then the hydride and oxide of carbon would respectively be represented as ______.
0%
0
0%
0
0%
0
0%
0
Isotopes are __________.
Atoms of an element with similar chemical properties but different atomic masses.
Atoms of different elements with similar chemical properties but different atomic masses.
Atoms of an element with different chemical properties but same atomic masses.
Atoms of different elements with different chemical properties but same atomic masses.
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