1).A potentiometer is an accurate and versatile device
to make elechical measurements of E.M.F. because
the method involves :
(1) cells
(2)1 potential gradients
(3)A a condition of no currenl flow through the
galvanometer
(4) a combination of cells, galvanometer and
resistances
2)A gas mixture consists of 2 moles of O, and 4 moles
of Ar at temperature T. Neglecting all vibrational
modes, the totalintemal energv of l.he system is
A.4 RT
B.15 RT
C.9 RT
D. 11 RT
3)Which of tle following statements are correct ?
G) Centre of mass o{ a body alrvays coincides
with the cenhe of gravity of the body.
(b) Cenhe of mass of a body is the point at which
the total gravitational torque on the body is
zero.
G) A couple on a body produce botlt".
translaiional and rotational motion in aborlyl -
(d) Mechanical advantage greater than one
means tlat small effort can be used to lift a
large load.
(1) (b) and (d)
(2) (a) and (b)
(3) (b) and ©
(4) ©and (d)
4).The species, having bond angles of 120’ is :
1)PH:3
2)OF:3
3)NC13
4)BCt3
5).which of the following reactions is appropdate for
converting acetamide to methalamine ?
(1) Carbylamine reaction
2)Hoffmann hypobromamide reaction
3)Stephens reaction
4)Gabriels phthalimide sYnthesis