Which statement about sound is true...?

Question

Accepted Answer

Sound can’t travel through  vacuum

Which statement about sound is true...? Mcqs

PPSC Past Papers

Which statement about sound is true...?

(A) Sound can’t travel through vacuum (B) Sound can’t travel through glass

(C) Sound can’t travel through water (D) Non of theses

Which statement about the fluid mosaic model of membrane structure is correct...?

(A) The lower the temperature, more fluid nature (B) Higher the temperature, less fluid nature

(C) The more unsaturated the fatty acid, the more fluid nature (D) The less unsaturated the fatty acid, the more fluid nature

Which statement is incorrect about gas molecules...?

(A) Molecules are widely separated (B) Molecules have low attractive forces

(C) Molecules free to move in any direction (D) Molecules collide with one another

Which statement is incorrect about solution...?

(A) The solution is a homogeneous mixture (B) In a solution the particles of solute and solvent are mixed

(C) The solution is a heterogeneous mixture (D) The colour and appearance are same in every part of the solution

Choose the one incorrect statement from the followings...?

(A) Six elements such as C, H, O, N, S and P are called basic elements of life (B) Foundation of life based on chemicals

(C) Members of different species form population (D) Part of earth where life exists is called biosphere

Which of the following statements is true when we see ‘rainbow’ ...?

(A) We face sun and raindrops (B) The Sun remains behind us and we face raindrops

(C) In light rainfall, we face Sun (D) The sky remains clear and the sun is at lower position in the sky

Which statement is true about the magnetic poles...?

(A) Unlike poles repel (B) Like poles attract

(C) Magnetic poles do not effect each other (D) A single magnetic pole does not exist

Which statement is incorrect about chemical reactions...?

(A) States of matter does not change during chemical reactions (B) Chemical reactions produce new substances

(C) Chemical reactions occur with the absorption or emission of energy (D) Chemical reactions may be fast, moderate or slow

Which statement is incorrect about particles in liquids...?

(A) Particles are little less closely packed (B) Particles are in loose clusters

(C) Particles are not in regular (D) Particles have large empty spaces between them

Which statement is incorrect about particles in solids...?

(A) Particles are in loose clusters (B) Particles are closely packed

(C) Particles are in regular pattern (D) Particles have small spaces between them

Which statement is incorrect about the force...?

(A) Force can change the content of an object (B) Force can change the shape of an object

(C) Force can change the direction of an object (D) Force can change the speed of an object

“Rancidity produced in butter can be decreased by adding quinoline to the butter”. This statements shows that _______________...?

(A) Nothing is impossible (B) Quinoline is an inhibitor

(C) Quinoline is a catalyst (D) Quinoline is an activator

Which of the following statements is true about escape velocity...?

(A) Escape velocity is independent of the mass of the planet (B) Escape velocity is independent of the mass of the escaping object

(C) Escape velocity decreases with an increase in the radius of the planet (D) Escape velocity depends on the shape of the planet

Which statement is true for limiting frictional force...?

(A) It is greater than rolling friction (B) It is greater than sliding friction

(C) It is greater than kinetic friction (D) All are true

Which statement is incorrect about suspension...?

(A) The suspension is heterogeneous mixture (B) In a suspension the particles of solute are dispersed

(C) The colour and appearance are not same in every part of the suspension (D) The suspension is transparent and clear

Rain drops fall from great height Which among the following statements is true regarding it...?

(A) they fall with that ultimate velocity, which are different for different droplets (B) they fall with same ultimate velocity

(C) their velocity increases and they fall with different velocity on the earth (D) their velocity increases and they fall with same velocity on the earth

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(A) Sound can’t travel through vacuum

(B) Sound can’t travel through glass

(C) Sound can’t travel through water

(D) Non of theses

(A) The lower the temperature, more fluid nature

(B) Higher the temperature, less fluid nature

(C) The more unsaturated the fatty acid, the more fluid nature

(D) The less unsaturated the fatty acid, the more fluid nature

(A) Molecules are widely separated

(B) Molecules have low attractive forces

(C) Molecules free to move in any direction

(D) Molecules collide with one another

(A) The solution is a homogeneous mixture

(B) In a solution the particles of solute and solvent are mixed

(C) The solution is a heterogeneous mixture

(D) The colour and appearance are same in every part of the solution

(A) Six elements such as C, H, O, N, S and P are called basic elements of life

(B) Foundation of life based on chemicals

(C) Members of different species form population

(D) Part of earth where life exists is called biosphere

(A) We face sun and raindrops

(B) The Sun remains behind us and we face raindrops

(C) In light rainfall, we face Sun

(D) The sky remains clear and the sun is at lower position in the sky

(A) Unlike poles repel

(B) Like poles attract

(C) Magnetic poles do not effect each other

(D) A single magnetic pole does not exist

(A) States of matter does not change during chemical reactions

(B) Chemical reactions produce new substances

(C) Chemical reactions occur with the absorption or emission of energy

(D) Chemical reactions may be fast, moderate or slow

(A) Particles are little less closely packed

(B) Particles are in loose clusters

(C) Particles are not in regular

(D) Particles have large empty spaces between them

(A) Particles are in loose clusters

(B) Particles are closely packed

(C) Particles are in regular pattern

(D) Particles have small spaces between them

(A) Force can change the content of an object

(B) Force can change the shape of an object

(C) Force can change the direction of an object

(D) Force can change the speed of an object

(A) Nothing is impossible

(B) Quinoline is an inhibitor

(C) Quinoline is a catalyst

(D) Quinoline is an activator

(A) Escape velocity is independent of the mass of the planet

(B) Escape velocity is independent of the mass of the escaping object

(C) Escape velocity decreases with an increase in the radius of the planet

(D) Escape velocity depends on the shape of the planet

(A) It is greater than rolling friction

(B) It is greater than sliding friction

(C) It is greater than kinetic friction

(D) All are true

(A) The suspension is heterogeneous mixture

(B) In a suspension the particles of solute are dispersed

(C) The colour and appearance are not same in every part of the suspension

(D) The suspension is transparent and clear

(A) they fall with that ultimate velocity, which are different for different droplets

(B) they fall with same ultimate velocity

(C) their velocity increases and they fall with different velocity on the earth

(D) their velocity increases and they fall with same velocity on the earth