601. The spreading of fragrance or scent in air is due to_______________?
A. Diffusion
B. Effusion
C. Attraction with air
D. Low dsensity
602. The highest temperature at which a substance can exist as a liquid is called its______________?
A. Critical temperature
B. Standard temperature
C. Absolute temperature
D. Upper consulate temperature
603. What do we call to sudden expansion of plasma ?
A. Avogadros law
B. Grahams law of diffusion
C. Joule Thompson effect
D. Daltons law of partial pressure
604. What will be the pressure of 1 mole of an ideal gas maintained at 300 K and 250cm3 volume ?
A. 98.5 atm
B. 96.7 atm
C. 95.8 atm
D. 97.1 atm
605. Who made volume and pressure correction to explain deviation of gases from ideal behaviour ?
A. Clausius
B. Boltzman
C. Charles
D. Vander waal
606. The gases become non-ideal at ________________?
A. High temperature and high pressure
B. Low temperature and low pressure
C. High temperature and low pressure
D. Low temperature and high pressure
607. The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is_________________?
A. 3
B. 2.7
C. 2
D. 1.5
608. If a buffer solution of higher pH than seven is to be made we use___________________?
A. Strong acid and strong base
B. Weak acid and strong base
C. Weak acid and strong base
D. Weak acid and its salt with strong base
609. AgCl dissolved with conc (2×10-2) Ksp will be__________________?
A. 3.6 x 10-6
B. 3.6 x 10-5
C. 7.2 x 10-6
D. 4 x 10-4
610. Which of the following will not change the concentration of ammonia at the equilibrium ?
A. Increase of pressure
B. Increase of volume
C. Addition of catalyst
D. Decrease of temperature