general knowledge

g.k bit's

1.The time for which a body remaing in air is called                                    [   ]

a.time of ascent  b.time of descent c.time of flight  d.free time

2.Electro-magnetic radiations with short-est wavelength are                        [   ]

a.Infra-red  b.Gams rays c.Ultraviolet rays d.X-rays

3.Periodic vibration of decreasing amplitude are called                                 [   ]
           
a.Forced vibration  b.Natural vibration  c.stationary vibration

d.damped vibration

4.The number of m values for l=3 is,                                                             [   ]

a.7  b.4  c.2  d.3

5.Molecular weight of Na2Co3 is                                                                 [   ]

a.126  b.106  c.120  d.130

6.DRY ice is                                                                                                [   ]

a.solid carbondioxide  b.solid carbon monoxide

c.solid carbonicacid  d.solid carbon tetrachloride

ans:

1.c 2.d  3.d  4.a  5.b  6.a