Options:
- A. CCI4
- B. CO2
- C. BF3
- D. none of the above
View Answer
D. none of the above
Chemistry
A method of separation of components from its solution using Distribution law is ___________________?
Options:
- A. Sublimation
- B. Crystallisation
- C. Solvent extraction
- D. Distillation
View Answer
C. Solvent extraction
Which of the following points are important in connection with equilibrium constant ?
Options:
- A. Kc is constant at given temperature
- B. Kc is unaffected by change in concentration of reactants or products
- C. Kc indicates the extent of reaction but not about the rate of reaction.
- D. All of the above
View Answer
D. All of the above
Equal masses of methane and oxygen are mixed in empty container at 250?(C) The fraction of total pressure exerted by oxygen is___________________?
Options:
- A. one / seventeen
- B. sixteen / seventeen
- C. one / three
- D. two / three
View Answer
C. one / three
Solubility of CaF2 is 2.0
Options:
- A. 4.0 x 10-8
- B. 3.2 x 10-11
- C. 2.0 x 10-8
- D. 4.0 x 10-12
View Answer
B. 3.2 x 10-11
The molecules of CO2 in dry ice form__________________?
Options:
- A. Ionic crystal
- B. Covalent crystal
- C. Molecular crystal
- D. Any type of crystal
View Answer
C. Molecular crystal
The hardest of the following solids is__________________?
Options:
- A. sodium
- B. diamond
- C. graphite
- D. magnesium
View Answer
B. diamond
The inhaled breath of diabetics patient contain acetone. A medical student wishes to test for diabetes by asking patient to bubble their breath through a reagent ?
Options:
- A. alkaline aquenous iodine
- B. aqueous bromine
- C. Fehling solution
- D. aqueous NaOH
View Answer
A. alkaline aquenous iodine
Which of the solid does not contain covalent bond__________________?
Options:
- A. copper
- B. ice
- C. diamond
- D. graphite
View Answer
A. copper
When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show ?
Options:
- A. phenol is unsaturated
- B. 2-bromophenol is insoluble in water
- C. a hydroxy group makes the benzene ring more susceptible to electrophilic attack
- D. acid-base reaction
View Answer
C. a hydroxy group makes the benzene ring more susceptible to electrophilic attack