Question

A pendulum has a time period of 2.5 sec. How many oscillations does it complete in 1hr? i) 1,140 ii) 1,440 iii) 1,044 iv) 1,404 (3) A device used to measure the distance covered by it is- i)speedometer ii)hydrometer iii)barometer iv) odometer (4) 10 years = 1 _________ i) century ii) decade iii)millenium iv) none of these (5) Conversion of a solid to gaseous form without any intermediate stage is- i) Transmission ii)Sublimation iii)Vapourisation iv)condensation (6) Saline water : Salt in water :: Soda water :___________ in water i)acetic acid ii)carbonic acid iii)sulphuric acid iv)nitric acid (7) _________ is an alloy of iron and carbon. i)steel ii)stainless steel iii)brass iv)bronze (8) On cooling, the temperature of an object _________. i)increases ii) decreases iii)remains constant iv)all of these (9) Heat from the sun reaches us by the process of ________. i) conduction ii)convection iii)radiation iv)insulation (10) Combustion takes place in the presence of _________. i)carbon dioxide ii)hydrogen iii)nitrogen iv)oxygen (11) Rhizobium bacteria live in the root nodules of _______ plants. i) kidney-beans ii) paddy iii)wheat iv)maize (12) ______ carries nutrients from digested food to all parts of the body. i)water ii)blood iii)saliva iv)mucous (13) A ________ indicator shows different colours over a range of pH values. i) natural ii) synthetic iii) acid-base iv) universal (14) -40°F = _____ °C i) 40 ii) 41 iii) -41 iv) -40 (15) Physical digestion that converts food into smaller pieces with the help of teeth is _______. i) Rumination ii) mastication iii) assimilation iv)egestion​

Answer 1

1ans = 1440

2ans=odometer

3ans=decade

4ans=sublimation

5ans=carbonic acid

6ans=steel

7ans=decreases

8ans=radiation

9ans=oxygen

10ans=kidney beans

11ans=blood

12ans=universal

13ans=-40-35*5/9 = 75*5/9 = -41

14ans=mastication

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