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WorksheetsCLASS 10 CHEMISTRY QUIZ
Total questions: 15
Worksheet time: 8mins
Water is removed when substance ‘X’ is heated and its colour changes from blue to white. Substance ‘X’ is:
CaSO₄
CuSO₄
FeSO₄
BaSO₄
Which of the following is a synthetic indicator?
Litmus
Turmeric
Onion
Phenolphthalein
Which of the following is an olfactory indicator?
Methyl orange
Phenolphthalein
Vanilla
Litmus
The chemical formula of cinnabar is:
ZnS
Cu₂S
HgS
FeS
Galvanisation is a process of coating iron with:
Copper
Aluminium
Zinc
Tin
The molecular formula of butanol is:
C₃H₇OH
CH₃COOH
C₄H₉OH
C₂H₅OH
The maximum number of electrons present in any shell is given by:
n²
2n
2n²
n³
Which metal is found in liquid state at room temperature?
Sodium
Calcium
Mercury
Aluminium
Tungsten is used as filament of electric bulb because:
Low resistivity and low melting point
High resistivity and low melting point
Low resistivity and high melting point
High resistivity and high melting point
As the pH value of a solution increases from 7 to 14, the concentration of H⁺ ions:
Increases
Decreases
Remains same
Becomes zero
The first member of homologous series of alkane is:
Ethane
Propane
Methane
Butane
Which of the following compounds is an alcohol?
CH₃COOH
C₂H₅OH
CH₄
C₂H₄
Rusting of iron requires:
Oxygen only
Water only
Carbon dioxide only
Oxygen and water
The pH value of a neutral solution is:
0
5
7
14
Which gas is released during reaction of zinc with dilute hydrochloric acid?
Oxygen
Nitrogen
Hydrogen
Carbon dioxide
