Which of the following shows electrical conduction
[CBSE PMT 1999; AIIMS 1999]
Potassium
Graphite
Diamond
Sodium
Graphite is a good conductor of electricity.
Which one among the following is a thermosetting plastic
[MP PMT 1993, 95; AIIMS 1999]
[MP PMT 1994, 95; DCE 1999, 2001; AIIMS 2001]
For a particle executing simple harmonic motion, which of the following statements is not correct
[MP PMT 1997; AIIMS 1999; Kerala PMT 2005]
Vitamin B12 contains metal
[Bihar MEE 1997; RPET 1999; Pb. PMT 1999; AFMC 2002;
CBSE PMT 2003; CPMT 2003; MP PMT 2003]