Options:
- A. tartaric acid
- B. ethyl alcohol
- C. methanol
- D. urea
View Answer
D. urea
Chemistry
If internal energy of the system is increased ____________________?
Options:
- A. Change in state of the system is increased
- B. Temperature of the ystem may rise
- C. Chemical reaction may take place
- D. All
View Answer
D. All
Unit of heat in SI system is________________?
Options:
- A. J
- B. KCaL
- C. Cal
- D. GJ
View Answer
A. J
Which one of the following has highest volatility_________________?
Options:
- A. Diethyl ether
- B. Ethyl alcohol
- C. Water
- D. Ethylene glycol
View Answer
A. Diethyl ether
Steam causes more sever burn than the boiling water because it possesses _________________?
Options:
- A. Latent heat of fusion
- B. Latent heat of vaporization
- C. Latent heat of sublimation
- D. All of the above
View Answer
B. Latent heat of vaporization
All of the following were theorized by Bohr in his description of the atom except__________________?
Options:
- A. Angular momentum of electrons in multiples of h/2?
- B. Electrons revolve in discrete circular orbits
- C. Energy of each electron is directly proportional to n2
- D. Electrons radiate energy continuously in a given orbit.
View Answer
D. Electrons radiate energy continuously in a given orbit.
When electrons collide with heavy metals than ___________ are produced?
Options:
- A. Beta-rays
- B. Alpha-rays
- C. X-rays
- D. Gamma-rays
View Answer
C. X-rays
The number of fundamental particles in an atom of the lightest isotope carbon are_______________?
Options:
- A. 6
- B. 12
- C. 18
- D. 20
View Answer
C. 18
Fluted filter paper is used to__________________?
Options:
- A. Filter hot solution
- B. Avoid premature crystallization
- C. Increase the rate of filtration
- D. Decrease the area
View Answer
C. Increase the rate of filtration
The most paramagnetic element is____________________?
Options:
- A. Iron
- B. Cobalt
- C. Chromium
- D. Manganese
View Answer
A. Iron