Font size
WorksheetsLet's Test your Knowledge
Total questions: 20
Worksheet time: 21mins
Which of the below elements will most likely form an Ionic Bond?
P and O
Li and Mg
Cs and O
Ne and Cl
Q. When Calcium forms a bond, what will occur?
Calcium with give away it two valence electrons to form an covalent bond.
Calcium will share its two valence electrons to form an covalent bond
Calcium will give away its two valence electrons to form an ionic bond
Calcium will share its two valence electrons to form an ionic bond.
Which of the impurities are present in hydrogen?
Hydrogen sulphide(H₂S)
Arsine(AsH3)
Both A and B
None of these
Label the following parts :-
a- dilute sulphuric acid , b-hydrogen , c-zinc granules
a- silver nitrate solution , b- carbon dioxide , c-stones
a-lead nitrate solution , b-methane , c- sugar crystals
All of the above
Why sulphuric acid is not used to dry hydrogen ?
It is not a good drying agent
It reacts with hydrogen
It is a strong oxidiser
None of these
In the reaction given below :
2FeCl3+H2S⟶2FeCl2+2HCl+S
Fecl3 acts as an oxidising agent
H2s acts as an oxidising agent
Both A and B
None of these
What do you observe when blue crystals of hydrated copper sulphate are heated in a test tube?
They turn into a white powder
They turn into a brown colour powder
They turn back into blue solid when few drops of water are added
Both A and C
Write the chemical name of the following :-
* Washing soda crystals
* Glauber's salt
* White vitriol
*Epsom salthmmh,,
Write your answer !!!
what do you observe when carbon dioxide in water reacts with limestone?
Calcium bicarbonate is formed
Calcium Nitrate is formed
Calcium chloride is formed
Calcium oxide is formed
Why concentric rings are not formed in rainwater and distilled water ?
They do not contain any dissolved solids
they are impure
both a and b
None of these
Which solution is required to remove arsine and phosphine from hydrogen?
AgNO3
Pb(NO3)2
KOH
None of these
Zinc , Lead are --------------- in nature
(a)
How hydrogen can be seperated from mixture of co2 and hydrogen?
pass the mixture through caustic potash solution
mixture is forced through cold water
both a and b
none of these
Why only Zinc Granules are taken in preparation of hydrogen?
contains an impurity of copper which acts as a catalyst
conains impurities
none of these
both a and b
Why nitric acid is not use for the preparation of hydrogen?
Why concentrated sulphuric acid is not used in preparation of hydrogen gas ?
What happen when metals react with steam ?
What do you observe when stream is passed over red hot coke?
(co + H2) s formed
Co is formed
both a and b
none of these
What do you observe when aluminium reacts with stream to liberate hydrogen ?
Solubility curve of Na2SO4. 10H2O rises till it reaches 32.8 celcius and then it falls slightly. Give reason
