MCQ on Flotation Class 9

5/5 - (15 votes)

MCQ on Flotation Class 9. We covered all the MCQ on buoyancy class 9 in this post for free so that you can practice well for the exam.

Install our MCQTUBE Android app from the Google Play Store and prepare for any competitive government exams for free.

We also covered some other topics of physical science like atoms and molecules and matter around us pure MCQ on our website for free.

You will get their respective links in the related posts section provided below.

Join Telegram Group and Get FREE Alerts! Join Now

Join WhatsApp Group For FREE Alerts! Join Now

Related Posts:

Questions hide

MCQ on Floating Bodies for Students

To find the loss of weight in a liquid, one has to immerse the body

a) Completely

b) Partly

c) In salted water only

d) To one fourth of its volume

Option a – Completely

Up thrust depends on

a) Density of liquid

b) Volume of body immersed

c) Volume of the liquid

d) both (a) and (b)

Option d – both (a) and (b)

Buoyancy force depends on

a) Level increase in measuring jar

b) Density of liquid

c) Acceleration due to gravity

d) All of these

Option d – All of these

When a body is immersed in a liquid, the forces acting on it are

a) weight

b) up thrust

c) both (a) and (b)

d) neither (a) nor (b)

Option c – both (a) and (b)

Which one of the following is not a result of surface tension?

(a) Nearly spherical drop of rain

(b) Capillary rise

(c) Removal of dirt by soap or detergent

(d) Flow of a liquid

Option d – Flow of a liquid

Surface tension depends on

(a) atmospheric pressure

(b) nature of the liquid

(c) the temperature of the liquid

(d) All of the above

Option d – All of the above

With the rise in temperature, the surface tension of a liquid

(a) increases

(b) decreases

(c) remains unchanged

(d) None of the above

Option b – decreases

Soaps clean surfaces on the principle of

(a) viscosity

(b) floatation

(c) elasticity

(d) surface tension

Option d – surface tension

Kerosene oil rises up in the wick of a lantern because of

(a) surface tension

(b) buoyant force of air

(c) diffusion of the oil through the wick

(d) the gravitational pull of the wick

Option a – surface tension

The surface tension of water on adding detergent to it

(a) increases

(b) decreases

(c) remains unchanged

(d) becomes zero

Option b – decreases

Insects can move on the surface of water without sinking due to

(a) viscosity of water

(b) the surface tension of water

(c) Both (a) and (b)

(d) None of the above

Option b – the surface tension of water

Why do water droplets always take a round shape when dropped onto plane surfaces? ( mcq on flotation class 9 )

(a) Due to gravity

(b) Due to atmospheric pressure

(c) Due to the presence of eddy currents in the air

(d) Due to the exertion of surface tension by the molecules

Option d – Due to the exertion of surface tension by the molecules

The sun is seen a little before it rises and for a short while after it sets. This is because of:

(a) Total internal reflection

(b) Atmospheric refraction

(c) Apparent shift in the direction of the sun

(d) Dispersion

Option b – Atmospheric refraction

When a ball bounces off the ground, which of the following changes suddenly? (Assume no loss of energy to the floor)

(a) Its speed

(b) Its Momentum

(c) Its kinetic energy

(d) Its potential energy

Option b – Its Momentum

If an object moves at a non-zero constant acceleration for a certain interval of time, then the distance it covers in that time:

(a) Depends on its initial velocity.

(b) Is independent of its initial velocity.

(c) Increases linearly with time.

(d) Depends on its initial displacement.

Option a – Depends on its initial velocity

Soaps clean surfaces according to the principles based on: ( mcq on flotation class 9 )

(a) Viscosity

(b) Floatation

(c) Elasticity

(d) Surface tension

Option d – Surface tension

The loudness of sound depends upon the:

(a) Velocity of sound waves in the medium

(b) Amplitude of the sound waves.

(c) Frequency of the sound waves.

(d) Frequency and velocity of the sound waves.

Option b – Amplitude of the sound waves

Compared to audible sound waves, ultrasound waves have:

(a) Higher speed

(b) Higher frequency

(c) Longer wavelength

(d) Both higher speed and frequency

Option d – Both higher speed and frequency

The temperature of a place on a sunny day is 113 in Fahrenheit scale. The Kelvin scale reading of this temperature will be:

(a) 318 K

(b) 45 K

(c) 62.8 K

(d) 335.8 K

Option a – 318 K

Metal has………. no. of electrons in their outermost shell ( mcq on flotation class 9 )

(a) 1 to 8

(b) 7 to 9

(c) 1 to 3

(d) 10 to 12

Option c – 1 to 3

Which of the following gas is lighter

(a) H₂

(b) SO₂

(c) O₂

(d) NO₂

Option a – H₂

Which method is employed for obtaining a pure metal?

(a) Froth floatation

(b) Electrolytic refining

(c) Magnetic separation

(d) Gravity separation

Option b – Electrolytic refining

What happens when a mixture of powdered iron and copper (II) oxide is heated in a crucible?

(a) Iron (II) oxide and copper are formed.

(b) Copper (III) oxide and iron (II) oxide are formed.

(c) Iron (III) oxide and copper sulphate are formed.

(d) No reaction takes place.

Option a – Iron (II) oxide and copper are formed

Why is the polling process employed?

(a) For the removal of Cu₂O from Cu

(b) For the removal of Al2O2 from Al

(c) For the removal of Fe₂O3 from Fe

Join Telegram Group and Get FREE Alerts! Join Now

Join WhatsApp Group For FREE Alerts! Join Now

(d) For the removal of MgCl₂ from Mg

Option a – For the removal of Cu₂O from Cu

In which of the following is thermite welding done?

(a) Girders

(b) Railway tracks

(c) Cracked machine parts

(d) All of the above

Option d – All of the above

Identify the formula of superphosphate of lime.

(a) Ca3(PO4)2

(b) CaHPO4

(c) Ca(OH)₂

(d) Ca(H₂PO4)2H₂O

Option d – Ca(H₂PO4)2H₂O

Which of the given metals is stored under kerosene to prevent oxidation?

(a) Copper

(b) Potassium

(c) Magnesium

(d) Calcium

Option b – Potassium

Non-metals generally form

(a) Anions

(b) Cations

(c) Ions

(d) None of these

Option a – Anions

Galvanisation is a method of protecting iron from rudfing by coating it with a thin layer of

(a) Galium

(b) Aluminium

(c) Zinc

(d) Silver

Option c – Zinc

An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following

(a) Mg

(b) Na

(c) P

(d) Ca

Option b – Na

The reaction between X and Y forms compound Z. X loses electrons and Y gains electrons. Which of the following properties is not shown by Z?

(a) Has a high melting point

(b) Has a low melting point

(c) Conducts electricity in a molten state

(d) Occurs as solid

Option c – Conducts electricity in a molten state

The electronic configurations of three elements X, Y and Z are X-2, 8; Y-2, 8, 7 and Z-2, 8, 2. Which of the following is correct?

(a) X is a metal

(b) Y is a metal

(c) Z is a non-metal

(d) Y is a non-metal and Z is a metal

Option c – Z is a non-metal

Which of the following non-metal is lustrous?

(a) Sulphur

(b) Oxygen

(c) Nitrogen

(d) iodine

Option d – iodine

Example of amphoteric oxide is :

(a) Na2O

(b) K₂O

(c) Al2O3

(d) MgO

Option c – Al2O3

Which one among the following is an acidic oxide?

(a) Na2O

(b) CO

(c) CO2

(d) Al2O3

Option c – CO2

The atomic number of an element ‘X’ is 12. Which inert gas is nearest to X?

(a) He

(b) Ar

(c) Ne

(d) Kr

Option c – Ne

The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called

(a) Roasting

(b) Reduction

(c) Calcination

(d) Smelting

Option c – Calcination

Oxides of moderately reactive metals like Zine, Iron, Nickel, Tin, Copper etc. are reduced by using

(a) Aluminium as a reducing agent

(b) Sodium as a reducing agent

(c) Carbon as a reducing agent

(d) Calcium as a reducing agent

Option c – Carbon as a reducing agent

In thermite welding a mixture of….. and…… is ignited with a burning magnesium ribbon which produces molten iron metal as a large amount of heat is evolved.

(a) iron (III) oxide and aluminium powder

(b) iron (II) oxide and aluminium powder

(c) iron (III) chloride and aluminium powder

(d) iron (III) sulphate and aluminium powder

Option a – iron (III) oxide and aluminium powder

Which of the following are not ionic compounds? (i) KC1 (ii) HCI (iii) CCl4 (iv) NaCl

(a) (i) and (ii)

(b) (ii) and (iii)

(c) (iii) and (iv)

(d) (i) and (iii)

Option b – (ii) and (iii)

Silver articles become black on prolonged exposure to air. This is due to the formation of

(a) Ag3N

(b) Ag₂O

(c) Ag₂S

(d) Ag₂S and Ag3N

Option c – Ag₂S

The reaction between X and Y forms compound Z. X loses electrons and Y gains electrons. Which of the following properties is not shown by Z?

(a) Has a high melting point

(b) Has a low melting point

(c) Conducts electricity in a molten state

(d) Occurs as solid

Option b – Has a low melting point

Brass is a mixture of ( mcq on flotation class 9 )

(a) copper and zinc

(b) copper and tin

(c) copper, nickel and zinc

(d) aluminium, copper and traces of Mg and Mn

Option a – copper and zinc

Which of the following non-metals has shining lustrous surfaces?

(a) Graphite and phosphorus

(b) Graphite and iodine

(c) Iodine and phosphorus

(d) Phosphorus and chlorine

Option b – Graphite and iodine

Consider the following elements : (i) Copper (ii) Gold (iii) Platinum (iv) Silver Which of the above elements exist free in nature?

(a) (i) and (ii)

(b) (ii) and (iii)

(c) (i), (ii) and (iv)

(d) (iii) and (iv)

Option c – (i), (ii) and (iv)

Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same? (i) Good thermal conductivity (ii) Good electrical conductivity (iii) Ductility (iv) High melting point

(a) (i) and (ii)

(b) (i) and (iii)

(c) (ii) and (iii)

(d) (i) and (iv)

Option d – (i) and (iv)

What happens when calcium is treated with water? (i) It does not react with water (ii) It reacts violently with water (iii) It reacts less violently with water (iv) Bubbles of hydrogen gas formed stick to the surface of calcium

(a) (i) and (iv)

(b) (ii) and (iii)

(c) (i) and (ii)

(d) (iii) and (iv)

Option d – (iii) and (iv)

Which property of metals is used for making bells and strings of musical instruments like the Sitar and Violin?

(a) Sonorousness

(b) Malleability

(c) Ductility

(d) Conductivity

Option a – Sonorousness

Al₂O3 + 2NaOH -> …….. + H₂O

(a) Al(OH)3

(b) Na20

(c) NaAlO₂

(d) AINaO₂

Option c – NaAlO₂

Which of the following is the correct arrangement of the given metals in ascending order of their reactivity? Zinc, Iron, Magnesium, Sodium

(a) Zinc > Iron > Magnesium > Sodium

(b) Sodium > Magnesium > Iron > Zinc

(c) Sodium > Zinc > Magnesium > Iron

(d) Sodium > Magnesium > Zinc > Iron

Option d – Sodium > Magnesium > Zinc > Iron

Which of the following pairs will give displacement reactions?

(a) FeSO4 solution and Copper metal

(b) AgNO3 solution and Copper metal

(c) CuSO4 solution and Silver metal

(d) NaCl solution and Copper metal

Option b – AgNO3 solution and Copper metal

Non-metals form covalent chlorides because

(a) they can give electrons to chlorine

(b) they can share electrons with chlorine

(c) they can give electrons to chlorine atoms to form chloride ions

(d) they cannot share electrons with chlorine atoms

Option b – they can share electrons with chlorine

Which of the following oxide(s) of iron would be obtained on the prolonged reaction of iron with steam?

(a) FeO

(b) Fe₂O3

(c) Fe3O4

(d) Fe₂O3 and Fe₂O4

Option c – Fe3O4

Which of tire following are not ionic compounds? (i) KCI (ii) HCI (iii) CCl4 (iv) NaCl

(a) (i) and (ii)

(b) (ii) and (iii)

(c) (iii) and (iv)

(d) (i) and (iii)

Option b – (ii) and (iii)

Highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the

(a) electrolysis of their molten chloride

(b) electrolysis of their molten oxides

(c) reduction by aluminium

(d) reduction by carbon

Option a – electrolysis of their molten chloride

The most abundant metal in the earth’s crust is

(a) Iron

(b) Aluminium

(c) Calcium

(d) Sodium

Option b – Aluminium

The poorest conductor of heat among metals is ( mcq on flotation class 9 )

(a) Lead

(b) Mercury

(c) Calcium

(d) Sodium

Option a – Lead

The capacitance of two capacitors is 4 µF, 6 μF, and P.D. of 30 V, and 20 V respectively. When the parallel combination of condensers is connected with a thin wire in parallel, their total energy will :

(A) reduce by 120 μ J

(B) increase by 240 μ J

(C) reduce by 240μ J

(D) be unchanged

Option a – reduce by 120 μ J

In Electrostatic generators, charges are carried into the shell on a rapidly moving belt made of

(A) superconducting material

(B) semi-conducting material

(C) conducting material

(D) insulating material

Option d – insulating material

Which of the following instrument works on the principle of action of sharp points?

(A) Cyclotron

(B) Van de Graff generator

(C) Dynamo

(D) Induction coil

Option b – Van de Graff generator

Van de Graff generator is :

(A) an electrostatic machine

(B) an electromagnetic machine

(C) used to produce changed particles

(D) an electrodynamic machine

Option a – an electrostatic machine

A Van de Graaff generator is used for

(A) to produce high potential

(B) to accelerate charged particles like protons, and deuterons

(C) in the study of nuclear physics

(D) all of these

Option d – all of these

The P.D. across the plates of a condenser is 60 V and its capacity is 12 uF. Another condenser of 24 uF is connected with it in series and its free plate is earthed. The P.D. across 24 uF capacitor will be :

(A) 90 V

(B) 60 V

(C) 30 V

(D) 20 V

Option c – 30 V

Two capacitors of 3 uF and 6 μF are connected in series across a P.D. of 120 V. The P. D. across 3 μF capacitor is :

(A) 50 V

(B) 80 V

(C) 110 V

(D) 40 V

Option b – 80 V

We covered all the MCQ on flotation class 9 mcq with answers pdf file provided above in this post for free so that you can practice well for the exam. Install our MCQTUBE Android app from the Google Play Store for free and practice well.

Check out the latest MCQ content by visiting our mcqtube website homepage.

Also, check out:

Join Telegram Group and Get FREE Alerts! Join Now

Join WhatsApp Group For FREE Alerts! Join Now

Hello, I am the admin of mcqtube.com website. I am a blogger and app developer. Thanks.

2 thoughts on “MCQ on Flotation Class 9”

Leave a Comment

Sticky Bottom Popup