Chemistry Class 9th
301: Effect on the volume of a gas by a change in the ______?
A) Pressure
B) Temperature
C) Volume
D) Matter
302: Liquid are less common and most of the matter exist as _____?
A. Solid
B. Liquid
C. Gas
D. None
303: Which occupy all available space?
A) Solid
B) Liquid
C) Gas
D) Plasma
304: Their intermolecular forces are very weak?
A) Solid
B) Liquid
C) Gas
D) None
305: Pressure is a significance property of ____?
A) Plasma
B) Pressure
C) Temperature
D) Gas
306: They diffuse slowly
A) Solid
B) Liquid
C) Gas
D) Plasma
307: _____ can diffuse rapidly?
A) Liquids
B) Gases
C) Solids
D) None
308: It is escaping of gas molecules through a tiny hole _____?
A) Diffusion
B) Effusion
C) Pressure
D) Temperature
309: Gas molecules are always in ______?
A) Random state
B) Linear state
C) Continuous state
D) None
310: The SI unit of force is _____?
A) Pascal
B) Pressure
C) Newton
D) Temperature
311: One pascal is equal to _____?
A) 1 Nm-2
B) 2Nm-2
C) Both
D) None
312: 1 mm of Hg=
A) 1 Pa
B) 1 torr
C) 1 Nm-2
D) None
313: 1 atm=
A) 780mm of Hg
B) 760mm of Hg
C) 750mm of Hg
D) 770mm of Hg
314: _____ are highly compressible?
A) Gases
B) Liquid
C) Solid
D) Plasma
315: Gas molecules are very ____?
A) Compressibility
B) Mobile
C) Gases
D) None
316: Gases have low density than solids and
A) Plasma
B) Liquids
C) Gases
D) None
317: Who presented boyle’s law?
A) Robert Frost
B) Robert Hooke
C) Robert Boyle
D) None
318: Normal human blood pressure is
A) 120/80
B) 130/70
C) 140/60
D) 150/40
319:Who presented Charles law?
A) Robert Boyle
B) J. Charles
C) Both
D) None
320: Matter exist in which physical state
A) Solid
B) Liquid
C) Gas
D) All