Quiz about SCIENCE 100

Question 1

The process of comparing an unknown quantity with known quantity is called :

Accepted Answer

(c) Measurement

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(a) Load

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(b) Effort

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(d) Weighing

Question 2

Which basic units are involved in dioptre unit ?

Accepted Answer

(b) m

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(a) kg, m , sec, A

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(c) kg , m .N

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(d) kg, sec, N

Question 3

Which one is the unit of intensity of sound ?

Accepted Answer

(b) deciball

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(a) Watt

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(c) pascal

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(d) Ampere

Question 4

How many inch in 1 yard?

Accepted Answer

(c) ) 36 inch..

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(a) 20 inch.

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(b) ) 25 inch.

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(d) ) 39 inch.

Question 5

The product of 1gm and 1cm/s² is called

Accepted Answer

(d) 1 dyne

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(a) 1 joule

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(b) 1 Newton

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(c) 1 Pascal

Question 6

A force, when acting on an object of 1 kg mass, produces acceleration of 1m/s2 in it is known as:

Accepted Answer

(d) 1 Newton force

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(a) 1 Watt power

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(b) 1 Joule energy

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(c) 1 Pascal pressure

Question 7

On which place of earth the value of g is more of the following ?

Accepted Answer

(c) pole

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(a) Equator

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(b) Center

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(d) Hilly region

Question 8

A cylindrical object of wood weighs 10 N on earth and 1.6 N on moon. Its mass is

Accepted Answer

(a) 1 kg

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(b) 16 kg

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(c) 8.4 kg

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(d) 6.25 kg

Question 9

A device which is used to measure the density of liquid is called?

Accepted Answer

(c) Hydrometer.

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(a)Thermometer .

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(b) Lactometer .

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(d) Nanometer.

Question 10

The ratio of density of the substance to the density of water at 4⁰c is called:

Accepted Answer

(d) Relative density.

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(a) Essential density.

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(b) Liquid density.

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(c) Proper density.

Question 11

When upthrust is equal to weight of an object, it

Accepted Answer

(a) floats

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(b) sinks

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(c) moves

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(d) stops

Question 12

Barometer is invented by

Accepted Answer

(d) Torricelli

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(a) Galileo

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(b) Robert Boyle

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(c) Charles

Question 13

Which one is different among them?

Accepted Answer

(b) hdg.

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(a) mc2

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(c) 1/2mv²

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(d) mgh

Question 14

Capacity of a body to do work is called

Accepted Answer

(a) energy

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(b) work load

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(c) kinetic energy

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(d) potential energy

Question 15

Which of the following is the form of heat?

Accepted Answer

(a) energy

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(b) force

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(c) power

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(d) resistance

Question 16

Melting point of ice at Fahrenheit is

Accepted Answer

(a) 32 degree

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(b) 100 degree

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(c) 212 degree

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(d) 75 degree

Question 17

Between the melting point and boiling point at a substance is a .................. .

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(b) Liquid

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(a) Solid

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(c) Gas

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(d) Crystal

Question 18

Angle of incidence is equal to angle of ...................... .

Accepted Answer

(a) reflection

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(b) refraction

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(c) transmission

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(d) incident

Question 19

Angle of reflection lies between reflected ray and ............. .

Accepted Answer

(a) normal line

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(b) incident ray

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(c) convergent ray

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(d) all of them

Question 20

Ratio of speed of light in air ( vacuum) and speed of light in a medium is known as

Accepted Answer

(c) refractive index

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(a) regular reflection

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(b) reflective index

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(d) regular refraction

Question 21

Power of a lens is defined as reciprocal of its ................... .

Accepted Answer

(a) focal length in meter

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(b) principal axis

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(c) optical centre

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(d) vertex

Question 22

Study of light behavior is called

Accepted Answer

(b) optics

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(a) lenses

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(c) mechanics

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(d) heat

Question 23

The image which cannot be obtained on the screen is called:

Accepted Answer

(d) Virtual image

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(a) imaginary image

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(b) Real image

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(c) inverted image

Question 24

People with long-sightedness are treated by using .................... .

Accepted Answer

(b) convex lens

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(a) concave lens

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(c) lens

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(d) none of them

Question 25

If the radius of curvature of a mirror is 20cm then the focal length is

Accepted Answer

(b) 10cm

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(a) 20cm

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(c) 40cm

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(d) 5cm

Question 26

Which of the following has longest wavelength ?

Accepted Answer

(a) radio waves

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(b) infrared

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(c) ultraviolet

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(d) gamma rays

Question 27

When a person has hypermetropia, the image is formed

Accepted Answer

(b) behind retina

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(a) in front of retina

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(c) on blind spot

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(d) none of them

Question 28

Electric current generates from which part of an atom?

Accepted Answer

(c) Electron

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(a) Nucleus

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(b) Proton

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(d) Neutron

Question 29

Which on is converts chemical energy into electric energy?

Accepted Answer

(c) Battery

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(a) Solar cell

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(b) generator

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(d) Nichrome wire

Question 30

Which instrument is used to measure the resistance of electricity?

Accepted Answer

(c) ohmmeter

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(a) ammeter

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(b) voltmeter

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(d) wattmeter

Question 31

A current of 2A flows through a 12V bulb then calculate the resistance .

Accepted Answer

(c) 6 Ohm

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(a) 24 Ohm

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(b) 0.165 Ohm

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(d) 48 Ohm

Question 32

By which metal the filament of an electric bulb is made of?

Accepted Answer

(d) tungsten

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(a) carbon

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(b) Nichrome

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(c) aluminium

Question 33

Nichrome wire is an alloy of :

Accepted Answer

(b) nickel and chromium

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(a) copper and silver

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(c) lead and Zinc

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(d) nitrogen and chromium

Question 34

Which of the following is the source of electricity?

Accepted Answer

(b) Cell

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(a) Bulb

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(c) Transformer

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(d) Voltmeter

Question 35

A short thin piece of wire which is heated up and melt by flowing of electric current in it, is called

Accepted Answer

(b) fuse

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(a) circuit

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(c) cell

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(d) resistor

Question 36

In Nepal, frequency of alternating current is

Accepted Answer

(b) 50 Hz

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(a) 40 Hz

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(c) 60 Hz

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(d) 70 Hz

Question 37

Adding common salt to distilled water makes it

Accepted Answer

(a) Good conductor

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(b) Insulator

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(c) Resistor

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(d) Both a and b

Question 38

When water is electrolyzed, then which gas collected at cathode?

Accepted Answer

(c) hydrogen

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(a) sulphur

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(b) oxygen

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(d) sulphur dioxide

Question 39

Abbreviation of 'MCB' is for

Accepted Answer

(d) miniature circuit breaker

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(a) moving circuit breaker

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(b) manual current breaker

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(c) manual circuit breaker

Question 40

If secondary voltage is smaller than primary voltage, transformer is called as:

Accepted Answer

(d) step-down transformer

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(a) positive transformer

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(b) step-up transformer

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(c) negative transformer

Question 41

What is the angle of dip at the magnetic pole of the earth?

Accepted Answer

(c) 900

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(a) 00

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(b) 450

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(d) 1200

Question 42

Nichrome is known as

Accepted Answer

(b) heating element

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(a) lighting element

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(c) inert element

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(d) active element

Question 43

Which of the following is source of current ?

Accepted Answer

(d) Battery

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(a) Ammeter

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(b) Voltmeter

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(c) Galvanometer

Question 44

The formation of hydrogen layer on copper plate in dry cell is known as:

Accepted Answer

(b) polarization

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(a) local action

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(c) anode

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(d) amalgamating

Question 45

What is the power of a lamp, if it is connected to a 12 V battery and draws a current of 0.5 A?

Accepted Answer

(a) 6 W

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(b) 0.5 W

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(c) 12W

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(d) 24W

Question 46

Average distance between nucleus and outer shell is called ............. .

Accepted Answer

(a) atomic size

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(b) nuclear size

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(c) shielding effect

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(d) none of above

Question 47

Which group of periodic table contains alkaline earth metal?

Accepted Answer

(c) IIA

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(a) IA

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(b) IIIA

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(d) IVA

Question 48

Brass is an example of

Accepted Answer

(a) An alloy

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(b) a compound

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(c) a mixture

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(d) an element

Question 49

When 4S orbital is complete, the entering electron goes into

Accepted Answer

(c) 3d

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(a) 5s

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(b)5p

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(d) 4p

Question 50

Which of the following is the very light and inert gas?

Accepted Answer

(c) helium

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(a) oxygen

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(b) hydrogen

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(d) neon

Question 51

How many number of neutrons (n⁰) in Atom of aluminum (Al)?

Accepted Answer

(c) 14

Answer

(a) 13

Answer

(b) 27

Answer

(d) 13

Question 52

A substance whose all atoms have same atomic number is ............. .

Accepted Answer

(b) element

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(a) molecule

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(c) atom

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(d) ion

Question 53

All of these radicals have a valency of 2, except ............... .

Accepted Answer

(c) NH4

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(a) SO4

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(b) CO3

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(d) SiO3

Question 54

All are covalent compounds except .................... .

Accepted Answer

(d) NaCl

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(a) CH4

Answer

(b) C₂H₆

Answer

(c) CH₃Cl

Question 55

Number of proton, neutron and electron in sulfide ion is respectively ....................... .

Accepted Answer

(d) 16,16 and 18

Answer

(a) 16,17 and 18

Answer

(b) 17,16 and 18

Answer

(c) 18,17 and 16

Question 56

When state of matter is changed from liquid to gas, we call it

Accepted Answer

(c) boiling

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(a) melting

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(b) freezing

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(d) condensing

Question 57

The horizontal rows in a periodic table are called

Accepted Answer

(b) periods

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(a) atomic structure

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(c) actinides

Answer

(d) groups

Question 58

From left to right in a period of periodic table proton number

Accepted Answer

(c) increase

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(a) decrease

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(b) neutral

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(d) none

Question 59

In Na₂CO₃, relative atomic mass of Oxygen is

Accepted Answer

(d) 48 amu

Answer

(a) 12 amu

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(b) 24 amu

Answer

(c) 36 amu

Question 60

If atomic weight and proton number of an atom is 24 and 12 respectively, number of electrons and neutron will be

Accepted Answer

(b) 12,12

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(a) 36,12

Answer

(c) 24,24

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(d) 12,24

Question 61

If NaOH reacts with HCl, reaction can be known as

Accepted Answer

(c) Neutralization

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(a) combustion

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(b) Thermal decomposition

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(d) Decomposition

Question 62

Phosphoric acid has formula .......... .

Accepted Answer

(c) H₃PO₄

Answer

(a) H₂PO₃

Answer

(b) H₂PO₄

Answer

(d) H₃PO₃

Question 63

In pH , the p is stand for :

Accepted Answer

(b) potential

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(a) proton

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(c) process

Answer

(d) primary

Question 64

Metal oxides are also called:

Accepted Answer

(b) basic oxides

Answer

(a) acid oxides

Answer

(c) neutral oxides

Answer

(d) none

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