Multiple Choice QuestionsAlkaline earth's metals are denser than alkali metals, because metallic bonding in alkaline earth's metal is
stronger
weaker
volatile
not present
On mixing urea with nitrous acid, the composition of the products is
NH2-NH2 + CO2
N2 + C + H2O
NH3 + CO2 + H2O
N2 + CO2 + H2O
Mark out the correct decreasing order of ease of addition of halogen.
CH2=CH2 > CH3-CH=CH-CH3 > CH3-C(CH3)=CH2 > (CH3)2C=C(CH3)2
(CH3)2C=C(CH3)2 > CH3-C(CH3)=CH2 > CH3-CH=CH-CH3 > CH2=H2
(CH3)2C=C(CH3)2 > CH3-CH=CHCH3 > CH3-C(CH3)=CH2 > CH2=CH2
CH2=CH2 > CH3-C(CH3)=CH2 > CH3-CH=CH-CH3 > (CH3)2C=C(CH3)2
Decomposition of H2O2 is a first order reaction. Initially, solution of H2O2 having half-life time 15 min is 16 volume. When solution becomes 1 volume
4 min
15 min
30 min
60 min
What is the two third life of a first order reaction having k = 5.48 × 10-14s-1?
1 × 1013 s
2 × 1013 s
8 × 1013 s
5 × 1014 s
In a cell that utilises the reaction
Zn (s) + 2H+ (aq) → Zn2+ + H2 (g)
addition of H2SO4 to cathode compartment will
lower the E and shift equilibrium to the left
lower the E and shift the equilibrium to the right
increase the E and shift the equilibrium to the right
increase the E and shift the equilibrium to the left
Which of the following solvents are aprotic ?
I. NH3
II. SO2
III. CH3CN
IV. CH3CO2H
I, II and III
I, III and IV
II and III
I and III
The most efficient agent for the absorption of SO3 is
80% H2SO4
98% H2SO4
50% H2SO4
20% H2SO4
B.
98% H2SO4
Since, 98% H2SO4 is used for absorbing dense fog of acid which is formed by dissolving SO3 in water.
Therefore, 98% H2SO4 is the most efficient reagent for absorption of SO3.
Which of the following reaction is used to make a fuel cell?
Cd (s) + 2Ni(OH)3 (s) → CdO (s) + 2Ni(OH)2 (s) + H2O (l)
2Fe (s) + O2 (g) + 4H+ (aq) → 2Fe2+ (aq) + 2H2O (l)
Pb (s) + PbO2 (s) + 2H2SO4 (aq) → 2PbSO4 (s) + 2H2O (l)
2H2 (g) + O2 (g) → 2H2O (l)
Switch
