Ques No.1: _________ is best suited for cotton.
Ans: Clayey soil
Ques No.2: Ice cubes are added to a glass of pure water and a glass of a pure alcohol. The ice would be ___________.
Ans: Floating in alcohol and sinking in water
Ques No.3: __________ occur on new moon and full moon days because on these days Sun, moon and earth are in a straight line.
Ans: Spring tides
Ques No.4: After long periods of use, a gray spot develops on the inside of a bulb. This is because the ____________.
Ans: tungsten filament evaporates and collects there
Ques No.5: Dead red blood cells are ___________.
Ans: stored in liver
Ques No.6: Cellulose is a __________.
Ques No.7: ________ is called the father of computer.
Ques No.8: DNA is a class of __________.
Ans: nucleic acids
Ques No.9: _______ is the symbol for silver.
Ques No.10: The average life of a red blood cell in the body is about __________.
Ans: 120 days