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WorksheetsFUN WITH CHEMICAL REACTIONS
Total questions: 20
Worksheet time: 10mins
Sodium hydroxide is commonly known as
baking soda
washing soda
caustic soda
The nature of the compund ammonium chloride is
acidic
basic
neutral
The reaction of lead nitrate with potassium iodide solution is an example of
combination reaction
single displacement reaction
double displacement reaction
decoposition reaction
Which of the following statement is correct?
Oxidation is gain of hydrogen
Oxidation is loss of hydrogen
Oxidation is gain of electrons
The products formed when carbon dioxide gas is passed over slaked lime is
calcium oxide + water
calcium chloride+ water
calcium carbonate + water
The naturally occurring acid present in tomato is
oxalic acid
tartaric acid
citric acid
acetic acid
When brine is electrolysed it gives
sodium chloride + chlorine + hydrogen
sodium oxide + chlorine + oxygen
sodium hydroxide + chlorine + hydrogen
sodium hydroxide + chlorine + oxygen
In electrolysis of water the ratio of hydrogen and oxygen formed is
2:1
1:2
same
The correct observation for the heating of lead nitrate is
emission of colourless fumes of sulphur dioxide gas
emission of colourless fumes of nitrogen dioxide gas
emission of brown fumes of nitric oxide gas
emission of brown fumes of nitrogen dioxide gas
Which of the following displacement reaction is not possible?
Copper sulphate solution + Zinc
Zinc sulphate solution + Iron
iron sulphate solution + aluminium
Copper sulphate solution + Iron
A shiny brown coloured element X on heating in air becomes black in colour. The element X is
copper
iron
zinc
magnesium
When phenolphthalein indicator is added to sodium bicarbonate solution, it is observed that the solution turns
colourless
yellow
pink
blue
Which of the following statements is correct about an aqueous solution of an acid ?
Higher the pH, stronger the acid
Higher the concentration of H+ ions, weaker the acid
Lower the pH, stronger the acid
Lower the concentration of H+ ions, stronger the acid
When zinc metal reacts with sodium hydroxide solution the main product formed is
Na2 Zn2 O
Na2 Zn O2
Na Zn2 O
Na Zn O2
The correct method of dilution of a concentrated acid is
adding acid to water slowly
adding both acid and water simultaneously
adding water to acid slowly
The compound which is used for removing permanent hardness of water is
calcium oxychloride
sodium bicarbonate
sodium carbonate decahydrate
The correct chemical formula of plaster of paris is
CaSO4
CaSO4 . 1/2 H2O
CaSO4 . 2 H2O
CaSO4 . H2O
When copper oxide reacts with dilute hydrochloric acid, the colour of the solution turns
blue-green
orange
reddish-brown
magenta pink
Our body works in the pH range of
5.5 to 6.5
8 to 9
7 to 7.8
10 to 12
To prepare baking powder, tartaric acid is mixed with
Na Cl
Na 2 CO 3
Na OH
Na H CO 3
