Physics-
General
Easy
Question
What is the ground state energy of positronium
The correct answer is:
Related Questions to study
physics-
Hydrogen bomb is based upon
Hydrogen bomb is based upon
physics-General
physics-
After 280 days, the activity of a radioactive sample is 6000 dps. The activity reduces to 3000dps after another 140 days. The initial activity of the sample(in ) is
After 280 days, the activity of a radioactive sample is 6000 dps. The activity reduces to 3000dps after another 140 days. The initial activity of the sample(in ) is
physics-General
chemistry-
Glycerol is a
Glycerol is a
chemistry-General
chemistry-
3- pentanol is a
3- pentanol is a
chemistry-General
chemistry-
Picric acid is
Picric acid is
chemistry-General
chemistry-
Butane-2-ol is
Butane-2-ol is
chemistry-General
chemistry-
and 
reacts to produce
and reacts to produce
chemistry-General
chemistry-
When ethyl bromide reacts with sodium acetylide the main product is
When ethyl bromide reacts with sodium acetylide the main product is
chemistry-General
chemistry-
Which of these do not undergo Wurtz reaction
Which of these do not undergo Wurtz reaction
chemistry-General
chemistry-
Carbon-halogen bond is strongest among the following
Carbon-halogen bond is strongest among the following
chemistry-General
chemistry-
Benzene hexachloride is prepared from benzene and chlorine in sunlight by
Benzene hexachloride is prepared from benzene and chlorine in sunlight by
chemistry-General
chemistry-
Which of the following reactions doesn’t give benzene
Which of the following reactions doesn’t give benzene
chemistry-General
chemistry-
The order of reactivities of the following alkyl halides for a 
reaction is
The order of reactivities of the following alkyl halides for a reaction is
chemistry-General
chemistry-
The correct order of C – X bond polarity is
The correct order of C – X bond polarity is
chemistry-General
chemistry-
The total number of stereoisomeric forms of 
known is
The total number of stereoisomeric forms of known is
chemistry-General
