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MCQ of chemistry(solve)

 Tick mark (✓) the correct choice 1).The region of the atmosphere nearest to the earth is a.Stratosphere          b.Mesosphere c.Troposphere           d.Thermosphere 2).The Ozone in the stratosphere is destroyed by  a.•Cl                            b.•OH   c.•H                            d.•ClO 3).The gases that give rise to photochemical smog are a.Oxides of sulphur b.Oxides of nitrogen c.Oxides of carbon d.Oxides of oxygen 4).The smog is essentially caused by the presence of a . Oxygen and Ozone b. Ozone and nitrogen c. Oxides of sulphur and nitrogen d. Oxygen and nitrogen 5).The gas of vital importance to all living organisms present in the stratosphere is a.Oxygen              b.nitrogen c.Ozone             ...
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Dimensions

Dimension, unit and Formula 1).Area=length*breath=m² =[M⁰L²T⁰] 2). Volume=length*breath*height=m³=[M⁰L³T⁰] 3). Speed=Distance/time =m/sec=[M⁰L¹T-¹] 4). Velocity=Displacement/time=m/sec=[M⁰L¹T-¹] 5). Acceleration=Change in Velocity/time=m/sec²=[M⁰L¹T-²] 6). Force=mass*acceleration=kgm/sec² or Newton=[M¹L¹T-²] 7). Weight=mass*gravity=kgm/sec² or Newton=[M¹L¹T-²] 8). Pressure=Force/Area=N/m² or pascal=[M¹L-¹T²] 9). Energy or Work=Force*distance=Nm or Joule=[M¹L²T-²] 10). Power=Work/time=watt=[M¹L²T-³] 11). Impulse=Force*time=kgm/sec or Ns=[M¹L¹T-¹] 12). Moment of force or Torque or Couple=Force *arm=kgm²/sec²=[M¹L²T-²] 13)LinearMomentum=mass*velocity=kgm/sec=[M¹L¹T-¹] 14). Frequency=1/time=Hertz=[M⁰L⁰T-1] 15). Angle=Arc/radius=No unit=[M⁰L⁰T⁰] 16).Areal velocity=Area/time=m²/sec=[M⁰L²T-¹] 17). Density=mass/volume=kg/m=[M¹L-³T⁰] 18) Specific Gravity=Density of substance/Density of water=No unit=[M⁰L⁰T⁰] 19).Stress=Force/Area=N/m² or pascal=[M¹L-¹T-²] 20). Strain=Change in length/Original l...
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Field of Biology

 Branches of Biology on the basis of Group of Organisms 1).Acarology- study of ticks and mites 2).Agrostology- study of grasses 3). Anthology- study of flowers 4).Aphidology- study of amphids                                                    (plant lice) 5).Araneology- study of spiders 6). Bacteriology- study of bacteria 7).Batrachology- study of frogs 8). Bryology- study of bryophytes 9). Cetology- study of whales 10). Conchology- study of molluscan shells 11). Dendrochronology- study of trees 12). Entomology- study of insects 13). Helminthology- study of helminths 14). Ichthyology- study of fishes 15). Lichenology- study of lichens 16). Malacology- study of mollusca  17). Mammalogy- study of mammals 18). Mycology- study of fungi 19). Nematology- study of nematodes 20).Nidology- study of nest of bird 21). Oncology- study of cancer 22). Ornith...
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MCQ of Cell

 Multiple Choice question 1).Who coined the term cell? a.Robert Hooke           b.Kolliker c.Rudolf Virchow        d.Swanson  Answer:a 2). Prokaryotic cell lacks a.Membrane bound organelles b.Nuclear membrane c.Nucleolus d.All Answer:d 3). Which of the following lacks nucleus? a.Flame cell              b.RBC of frog c.RBC of man            d.WBC of man Answer:c 4).DNA is not present in: a. Nucleus              b.Mitochondria c.Chloroplast         d.Ribosome Answer:d 5). Prokaryotic genetic system has a.DNA but no histones b.Either DNA or histones c.Neither DNA nor Histones d.Both DNA and Histones Answer:a 6). Which is characteristics of animals cells only? a.Cell plate              b.Cell furrow c.Spindle                  d.Mi...
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MCQ of Earthworm

  Multiple Choice questions 1). Earthworm appears brown due to presence of: a.creatinine                    b.porphyrin c.Chloragogen cells     d. Melanin Answer:b 2).In Pheretimaposthuma ,setae are absent in ............ segment. a.14th to 16th          b.Cliteller region c.10th to 14th           d.Typhlosolar region Answer:a 3).Seminal vesicles in earthworm is located along the segments a.9th to 10th             b.11th to 12th c.13th to 14th            d.15th to 16th Answer:b  4). Number of hearts in earthworm is  a).1 pair             b.2 pairs c.3 pairs             d.4 pairs Answer:d 5). Earthworm has four pairs of hearts in following segments a.7,9,12,13           b.7,9,10 c.7,8,10,12...
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