AIEEE old paper set 3

AIEEE old paper set 3
Question:-
Option (A)
A is false and B is true
Option (B)
both A and B are true
Option (C)
both A and B are false
Option (D)
A is true and B is false
Correct Option:
B
Question Solution:
Sol- 2{cos (b- l) + cos (l- a) + cos (a- b)} + 3 = 0


(cos a+ cos b+ cos l)2 + (sin a+ sin b+ sin l)2 = 0


åcos a= 0 = åsin a
Question:-
Option (A)
any even integer
Option (B)
any odd integer
Option (C)
any integer
Option (D)
Zero
Correct Option:
B
Question Solution:
Sol- As ab + bc ¹0














Þ- 4b (-a - c) - 2 [(-1)n (c - b) (a + c) - (-1)n (b + c) (a + c)] = 0


Þ4b (a + c) - 2(-1)n [(c - b) (a + c) - (b + c) (a + c)] = 0


Þ4b(a + c) - 2(-1)n (a + c) [c - b - b - c] = 0


Þ4b (a + c) + 4b (-1)n (a + c) = 0


Þn is odd integer
Question:-
Option (A)
The solution is non-ideal, showing +ve deviation from Raoult-s Law
Option (B)
The solution in non-ideal, showing-ve deviation from Raoult-s Law
Option (C)
n-heptane shows +ve deviation while ethanol shows -ve deviation from Raoult-s Law
Option (D)
The solution formed is an ideal solution
Correct Option:
A
Question Solution:
The solution is non-ideal, showing +ve deviation from Raoult-s Law
Question:-
Option (A)
-1
Option (B)
1
Option (C)
-1/Ö2
Option (D)
- 2Ö2
Correct Option:
D
Question Solution:
Since Fnet is zero






(kqQ/a2) [Ö2]+(kQ2/2a2)=0


Q/q=-2Ö2
Question:-
Option (A)
HCHO
Option (B)
CH3COCH3
Option (C)
CH3COOH
Option (D)
CH3OH
Correct Option:
C
Question Solution:
Sol- CH3COOH + C2H5OH __H2_SO4 ®CH3COOC2H5 + H2O

Ester (Fruity smell)
Question:-
Option (A)
Option (B)
Option (C)
Option (D)
Correct Option:
A
Question Solution:
(dQ/dt)=-kA(dq/dx)


At steady state (dQ/dt) =constant


dqa-dx



q0qdq=-k0xdx



q=q0 -Kx