The chemicals and the reaction conditions required for the preparation of ethane are
C2H5I, Zn-Cu, C2H5OH
CH3Cl, Na, H2O
KOOC-CH=CH-COOK, , electrolysis
CH3CO2Na, NaOH, CaO, Δ
Sodium is heated in air at 300°C to form X. X absorbs CO2 and forms Na2CO3 and Y. Which of the following is Y ?
H2
O2
H2O2
O3
B.
O2
The reaction is as follows
Sodium peroxide is used in the purification of air in submarines because it combines, with CO2 to give O2.
Which one of the following reactions does not form gaseous product?
PbO2 + H2O2 →
Acidified KMnO4 + H2O2 →
PbS + H2O2 →
Cl2 + H2O2 →
Which of the following compounds is soluble in benzene but almost insoluble in water?
C2H5OH
CH3CO2H
CH3CHO
C6H5NO2
Which of the following is a pair of functional isomers?
CH3COCH3, CH3CHO
C2H5CO2H, CH3CO2CH3
C2H5CO2H, CHCO2C2H5
CH3CO2H, CH3CHO
In which of the following reactions, MgO is not formed?
Mg + CO2 →
Mg + dil. HNO3 →
Mg + NO
Mg + B2O3
The compound prepared by a substitution reaction of benzene is
acetophenone
glyoxal
cyclohexane
hexabromo cyclohexane
Which of the following is not correct ?
SiO2 is used as acid flux
The distance between the layers in graphite is 3.35 × 10-3 cm.
SiO2 reacts with Na2CO3 and liberates CO.
The hybridisaton of C in graphite is sp2.
Which of the following is not correct ?
Ammonia is used as refrigerant
A mixture of Ca(CN)2 and C is known as nitrolim.
A mixture of Ca(H2PO4)2 and CaSO4 .2H2O is known as superphosphate of lime.
Hydrolysis of NCl3 gives NH3 and HOCl.