s - Block Elements (Part-2)
Quiz by Sara Sachin
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- Q1
In between the metals A and B both form oxide but only B forms nitride, when both burnt in air so A and B are
Mg, Ca
Cs, K
Li, Na
K, Mg
30s - Q2
There is loss in weight when mixture of Li2CO3 andNa2CO3.10H2O is heated strongly. This loss is due to :
none
Na2CO3.10H2O
Li2CO3
both
30s - Q3
A wire of an alkaline earth metal X, burnt in air and dipped in water, a gas ‘Y’ is evolved X and Y are respectively :–
Be, NO2
Mg, NH3
Na, NO2
Mg, CO2
30s - Q4
Ratio of SiO2 and Al2O3 for a good quality cement.
2.5 – 4.0
3.5 – 5.0
1.5 – 2.5
0.5 – 1.5
30s - Q5
To obtain pure NaCl final solution is saturated with which of the following gas
N2
O2
NH3
HCl
30s - Q6
Solvay process cannot be used for the manufacture of K2CO3 since
All
KHCO3 is having high lattice energy and Less solubility
KHCO3 is having high MP
KHCO3 is having high hydration enthalpy and more solubility
30s - Q7
Solubility of carbonate, sulphates, hydroxides of alkaline earth metals has an order'
increase, increase, increase
decrease, decrease, decrease
decrease, increase, increase
decrease, decrease, increase
30s - Q8
Lime water turns milky by the passage of CO2 and milkyness disappears when excess of CO2 is passed Compounds responsible for these processes are
Ca(OH)2, Ca(HCO3)2
CaCO3, CaO
Ca(HCO3)2, CaCO3
CaCO3, Ca(HCO3)2
30s - Q9
Sodium metal can be used for the drying of
Dimethyl ether
Ethanol
Ammonia
Phenol
30s - Q10
Which of the metal is used with aluminium to form air craft parts.
None
K
Li
Na
30s - Q11
Which of the following used as a important constituent of glass industry.
LiCO3
MgCO3
None
Na2CO3
30s - Q12
Which metal maintain ion balance and nerve impulse conduction in human body
Both 1 and 2
None
Na
K
30s - Q13
________ is used in manufacturing of artificial silk
LiOH
RbOH
NaOH
KOH
30s - Q14
Which substance is used for making windows of ray tubes?
Radium
Barium
Strontium
Beryllium
30s - Q15
Substance used in purification of sugar :
Ca(OH)2
BeO
CaO
BeCl2
30s