Chemistry MCQS

281. Which of the following is a temperature-dependent concentration unit:
A. Molarity
B. Molality
C. Mole Fraction
D. All of the above

282. 10 g of glucose is dissolved in 100 ml of water % w/v concentration of the solution is:
A. 10%
B. 100%
C. Less than 10%
D. More than 10%

283. 10 % solution of glucose containing 15 g of glucose is:
A. 100 ml
B. 50 ml
C. 150 ml
D. 15 ml

284. Which one occurs in whole number always?
A. Molecular weight
B. Atomic number
C. Equivalent weight
D. None of the above

285. Which statement is false about electrons?
A. Wave is associated with an electron
B. Electron is a particle
C. Oriented by a magnetic field
D. None of the above

286. Existence of nucleus is confirmed by?
A. Alpha scattering by thin metal foil
B. Thermal analysis
C. Spectroscopy
D. None of the above

287. NMR uses which source of radiation?
A. Ultraviolet waves
B. Radio waves
C. Microwaves
D. Visible waves

288. Which solvent is used in IR spectroscopy?
A. CCl4
B. CH3OH
C. CH3CH2OH
D. None of the above

289. Identify Marsh gas among the following?
A. NaHCO3
B. NaCl
C. CH4
D. None of the above

290. IR determines _ bond.
A. Nature of bond
B. Kind of bond
C. Hydrocarbon
D. None of the above