1: Decomposition of CaCO3 gives?
None of the above
CaO+CO
Water
CaO+CO2**
2:what would be your observation when drops of NaOH is added to aluminum salt?
White precipitate**
All of the above
Yellow precipitate
Green precipitate
3:Constant weight is obtained when the process of heating,cooling and weighing is?
All of the options
Done once
Done 2 times
Repeated**
4:To Know the accurate concentration of acid prepared,we will have to perform-
Standardisation process**
Accuracy
None of the options
Precision
4:which of the following is true about benzoic acid-
Universal indicator**
Strong acid
None of the options
Strong base
6:when gas is evolve when drops of aqueous ammonia is added to aluminium salt and warm—
Ammonia**
Oxygen
Sulphur
Nitrogen
7: which of the following is a method to show the presence of benzoic acid
Foil test
Dilution
Infra-red**
Titrimetric
8:the PH range for acidic medium?
0-8.0
0-6.9**
None of the options
0-7.0
9: what is the value for volume at stp?
2204dm3
22.4dm3**
224dm3
22.4cm3
10: what would be your observation when excess drops of NaOH is added to aluminium salt—
Gas evolve
Precipitate dissolved**
Heat is given out
Precipitate undissolved.
Comments