1. Any of you may take it; I don't care ____.
A. whichB. whatC. whoD. whom
2. The synonym of ‘Stringent’ is-
A. RigorousB. ShrillC. DryD. Strained
3. Which one is an acidic buffer solution?
A. NaOH + HClB. H2S + HClC. Aq. NH3 + HClD. CH3COOH + CH3COONa
4. If the average life of a radioactive substance is 1 year then its half life-
A. 0.5 yearB. 2 yearC. year 1D. 0.693 year T 1 2 = ln 2 × τ = 0.693 × 1 = 0.693
5. What kind of change occurs in hybridization of carbon atom during combustion of methane? (CH4)
A. atom is hybridized.]B. from to sp3 spC. from to sp3 sp2D. from to sp2 sp
6. Among 6 friends, in how many ways one or more than one friend can be invited?
A. 26B. 26+1C. 26 − 1D. 62