Ques No.1: The most important stimulant in tea leaves is _________.
Ques No.2: Enzymes are __________.
Ans: Biological catalysts
Ques No.3: The acid present in the sour milk is _________.
Ans: Formic acid
Ques No.4: _______ is used in storage batteries.
Ques No.5: The velocity of wind is related to _________.
Ans: Pressure gradient
Ques No.6: _________ is used for dating very old objects of archaeological importance.
Ques No.7: ________ are the lines connecting the places having same Atmospheric pressure.
Ques No.8: ECG is an instrument used for the _____________.
Ans: disorder of Heart
Ques No.9: The mixture of __________ is required in gas welding.
Ans: Acetylene and oxygen gases
Ques No.10: _________ is used as a raw material in the manufacture of foam used in mattresses, cushions, etc.