Which of the following molecule is polar__________________?
A. CCI4
B. CO2
C. BF3
D. none of the above
Chemistry Basic Concept
Which of the following elements has greater 1st ionization energy__________________?
Which of the following elements has greater 1st ionization energy__________________?
A. B
B. C
C. N
D. O
Which catalyst is used in contact process ?
Which catalyst is used in contact process ?
A. Fe2O3
B. V2O5
C. SO3
D. Ag2O
What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3 ?
What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3 ?
A. 6
B. 4
C. 3
D. 2
On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________?
On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________?
A. k
B. black
C. yellow
D. brick red
Fruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal ?
Fruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal ?
A. aluminium can be recycled
B. aluminium has very low density
C. aluminium is the most abundant metal in the earth crust
D. aluminium is resistant to corrosion by organic acids.
In solids the temperature is the measure of__________________?
In solids the temperature is the measure of__________________?
A. Average kinetic energy of molecules
B. Vibrational kinetic energy
C. Translational kinetic energy
D. None of the above
All the transition elements show_________________?
All the transition elements show_________________?
A. Similar physical properties
B. Similar chemical properties
C. Both A and b
D. None
Purines and pyrimidines are_________________?
Purines and pyrimidines are_________________?
A. Enzymes
B. Nitrogenous bases
C. Carbohydrates
D. Lipids
Which of the following element doesnot show allotropy_________________?
Which of the following element doesnot show allotropy_________________?
A. Carbon
B. Arsenic
C. Nitrogen
D. Sulphur