Two glass bulbs A and B are connected by a very small tube having a stop-cock. Bulb A has a volume of 100 cm3 and contained the gas while bulb B was empty. On opening stop-clock, the pressure fell down to 40%. The volume of the bulb B must be
75 cm3
125 cm3
150 cm3
250 cm3
20 mL of 0.2 M NaOH is added to 50 mL of 0.2 M acetic acid. The pH of this solution after mixing is (Ka=1.8x 10°)
4.5
2.3
3.8
4
A vessel at 1000 K contains CO2 with a pressure of 0.5 atm. Some of the CO2 is converted into CO on the addition of graphite. The value of K if the total pressure at equilibrium is 0.8 atm, is
1.8 atm
3 atm
0.3 atm
0.18 atm
For the reaction cal, which one of the following conditions would favour the yield of C on the basis of Le-Chatelier principle?
High pressure, high temperature
Only low temperature
High pressure, low temperature
Only low pressure
Heat of formation, of an explosive compound like NCl3 is
positive
Negative
Zero
Positive or Negative
CH3CH2Br undergoes Wurtz reaction. We may expect some of the following product
A: CH3CH2CH2CH3
B:
C: CH3-CH3
Select correct product.
Only A
A and B
A, B and C
A and C