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