A. Si2o3
B. Sio2
C. Al2o3
D. Sr2o
A. Sand and iron filing
B. Sand and naphthalene
C. Both a & b
D. None
A. To check its acidity and basicity
B. To check temperature
C. To check its purity and nature
D. None of these
A. Due to hydrogen bonding
B. Due to high molecular weight
C. Due to its acidic nature
D. Due to its low molecular weight
A. 78°c
B. 58°c
C. 73°c
D. 56°c
A. Decantation
B. Sublimation
C. Evaporation
D. None
A. 9
B. 6.5-7
C. 8
D. 12
A. Nitrogen
B. Helium
C. Oxygen
D. Argon
A. Stratosphere
B. Mesosphere
C. Troposphere
D. Thermosphere
A. 35 km/h
B. 55 km/h
C. 75 km/h
D. 100 km/h