CBSE
Multiple Choice QuestionsThe total number of protons in 10g of calcium carbonate is (N0 = 6.023 x 1023):
3.01 × 1024
4.06 × 1024
2.01 × 1024
3.02 × 1024
A compound X on heating gives a colourless gas. This residue is dissolved in water to obtain Y. Excess CO2 is bubbled through aqueous solution of Y when Z is formed. Z on gentle heating gives back X. The X is
CaCO3
Ca(HCO3)2
Na2CO3
NaHCO3
Bleaching action of SO2 is due to its :
oxidising property
acidic property
basic property
reducing property
Which of the following is a false statement ?
Fluorine is more electronegative than chlorine
Nitrogen has greater IE1 than oxygen
Lithium is amphoteric
Chlorine is an oxidising agent
The starting material used in Solvay's process are
sodium sulphate
brine solution
carnallite
all of the above
The first ionisation potential is maximum for
B
N
O
Be
Which one of the following can produce hydrogen when treated with metallic sodium?
(CH3)2NH
CH3NH2
C6H5NH2
CH3CONH2
The first ionisation potential of Na, Mg, Al and Si are in the order
Na <Mg> Al <Si
Na> Mg> Al> Si
Na < Mg< Al> Si
Na> Mg> Al<Si
Bleaching action of bleaching powder is due to the liberation of
O2
OCl-
Cl2
Cl-
Which of the oxides does not react with both of an acid and alkali, is ?
ZnO
SnO2
Al2O3
BeO
