Choose the correct one

(a)

mm < cm < m < km

(b)

mm > cm > m > km

(c)

km < m < cm < mm

(d)

mm > m > cm > km

Which among the following is not a device to measure mass?

(a)

Spring balance

(b)

Beam balance

(c)

Physical balance

(d)

Digital balance

Unit of acceleration is________.

(a)

ms^-2

(b)

ms^-1

(c)

\(\frac{m}{s}\)

(d)

\(\frac{s}{m}\)

The area under velocity – time graph represents the

(a)

velocity of the moving object

(b)

displacement covered by the moving object

(c)

speed of the moving object

(d)

acceleration of the moving object

Force involved in uniform circular motion is given by _____________.

(a)

f = mv²/r

(b)

f = mvr

(c)

f = mr²/v

(d)

f = v²/r

Area under a velocity time graph gives ______

(a)

time taken by an object

(b)

distance travelled by an object

(c)

acceleration

(d)

retardation

A ray of light passes from one medium to another medium. Refraction takes place when angle of incidence is

(a)

0^o

(b)

45^o

(c)

90^o

(d)

120^o

The speed of light is maximum in

(a)

vacuum

(b)

glass

(c)

diamond

(d)

graphite

Mirrors having spherical surface of reflection are __________________

(a)

plane mirror

(b)

lenses

(c)

spherical mirrors

(d)

prism

Filtration method is effective in separating _______ mixture

(a)

Solid-solid

(b)

solid-liquid

(c)

liquid-liquid

(d)

liquid-gas

For a simple distillation process we need to have

(a)

an evaporating dish

(b)

a separating funnel

(c)

a filter with filter paper

(d)

a Liebig condenser

Mixture of two immiscible liquids are separated by using a______

(a)

funnel

(b)

test tube

(c)

beaker

(d)

separating funnel

Change in the number of neutrons in an atom changes it to

(a)

an ion

(b)

an isotope

(c)

an isobar

(d)

another element

The term nucleons refer to

(a)

Protons and electrons

(b)

only Neutrons

(c)

electrons and neutrons

(d)

Protons and neutrons

Atoms of the same element having same atomic number but different Mass number are called _________

(a)

Isotopes

(b)

Isobars

(c)

Isotones

(d)

Isotherm

The non-directional movement of a plant part in response to temperature is called ________.

(a)

thermotropism

(b)

Thermonasty

(c)

chemotropism

(d)

thigmonasty

Chlorophyll in a leaf is required for __________.

(a)

photosynthesis

(b)

transpiration

(c)

tropic movement

(d)

nastic movement

Shoots are said to_____________.

(a)

Negative phototropism

(b)

Positive phototropism

(c)

Positive hydrotropism

(d)

Negative chemotropism

Mesoglea is present in

(a)

Porifera

(b)

Coelenterata

(c)

Annelida

(d)

Arthropoda

Poikilothermic organisms are

(a)

Fish, Frog, lizard, man

(b)

Fish, Frog, lizard, cow

(c)

Fish, Frog, lizard, snake

(d)

Fish, Frog, lizard, crow

Find the incorrect pair.
 

(a)

 Earth worm - Metamerism

(b)

Round worm - Pseudocoelom

(c)

Hydra Polyp - Medusa

(d)

Star fish - Asymmetrical

The physician who discovered that scurvy can be cured by ingestion of citrus fruits is  ______________

(a)

James Lind

(b)

Louis Pasteur

(c)

Charles Darwin

(d)

Isaac Newton

The sprouting of onion and potatoes can be delayed by the process of _______________

(a)

irradiation

(b)

freezing

(c)

Salting

(d)

Canning

Lipases are enzymes which breaks down __________.

(a)

Proteins

(b)

Fats

(c)

Carbohydrates

(d)

Food

____________ is an electronic device which stores data and information

(a)

Telescope

(b)

Television

(c)

Computer

(d)

Radio

Data processing involves________ steps

(a)

seven

(b)

four

(c)

six

(d)

eight

SI unit of temperature is

(a)

fahrenheit

(b)

joule

(c)

celsius

(d)

kelvin

Two cylinders of equal height and radius are made of copper and aluminium. Which of them conducts heat faster?

(a)

Copper rod

(b)

Aluminium rod

(c)

Both of them

(d)

None of them

When we heat one end of an iron rod, its other end also get heated. Can you say, Which one of the following is behind this?

(a)

Convection of heat

(b)

Radiation of heat

(c)

Insulation of heat

(d)

Conduction of heat

In current electricity, a positive charge refers to,

(a)

presence of electron

(b)

presence of proton

(c)

absence of electron

(d)

absence of proton

Electroplating is an example for

(a)

heating effect

(b)

chemical effect

(c)

flowing effect

(d)

magnetic effect

Two resistances R₁ and R₂ are connected is parallel. Their equivalent resistance is__________

(a)

R₁₊R₂

(b)

\(\cfrac { { R }_{ 1 }{ R }_{ 2 } }{ { R }_{ 1 }+{ R }_{ 2 } } \)

(c)

\(\cfrac { { R }_{ 1 }+{ R }_{ 2 } }{ { R }_{ 1 }{ R }_{ 2 } } \)

(d)

\(\sqrt { { R }_{ 1 }+{ R }_{ 2 } } \)

An electric generator converts

(a)

electrical energy into mechanical energy

(b)

mechanical energy into heat energy

(c)

electrical energy into electrical energy

(d)

mechanical energy into electrical energy

The part of the AC generator that passes the current from the armature coil to the external circuit is

(a)

field magnet

(b)

split rings

(c)

slip rings

(d)

brushes

The magnetic field produced due to a circular wire at its centre is_________

(a)

at 45° to the plane of the wire

(b)

at 60° to the plane of the wire

(c)

in the plane of the wire

(d)

perpendicular to the plane of the wire

The increasing order of the energy of subshells is

(a)

s>p>d>f

(b)

s

(c)

p

(d)

p

If the electronic configuration of an element is 1s² 2s² 2p⁶ 3s² 3p¹, then it will occupy___________ block of the periodic table.

(a)

s

(b)

p

(c)

d

(d)

f

The maximum number of electrons that can be accommodated in s, p ,d, and f subshells are__________

(a)

14, 10, 6, 2

(b)

6, 10, 2, 14

(c)

2, 6, 10, 14

(d)

6, 2, 14, 10

Oxidising agents are also called as____________because they remove electrons form other substances.

(a)

electron donors

(b)

electron acceptors

(c)

reducing agents

(d)

Ionic agents

Elements with stable electronic configurations have eight electrons in their valence shell. They are__________

(a)

Halogens

(b)

Metals

(c)

Noble gases

(d)

non metals

Statement (A) Ionic compounds do not conduct electricity in solid state.
Reason (B) The ions in ionic compounds are tightly held together by strong electrostatic force of attraction and they can not move freely

(a)

B explains A

(b)

B do not explain A

(c)

B is wrong A

(d)

A is right B is wrong

pH value of human blood is_________

(a)

7.0

(b)

7.4

(c)

7.6

(d)

7.6

The hydrated salt of copper sulphate has______colour

(a)

Red

(b)

White

(c)

Blue

(d)

Pink

Which of the following are the is a weak bases?

(a)

NH₄OH & NaOH

(b)

Ca(OH)₂& KOH

(c)

NH₄OH & Ca(OH)₂

(d)

NaOH & KOH

Nerve cell does not contains

(a)

axon

(b)

nerve endings

(c)

tendons

(d)

dendrites

Tendon connects

(a)

cartilage with muscles

(b)

bone with muscles

(c)

ligament with muscles

(d)

bone with bone

_________is seen in unicellular animals.

(a)

Mitosis

(b)

mieosis

(c)

Amitosis

(d)

none of the above

Stomach of human beings mainly digests

(a)

carbohydrates

(b)

proteins

(c)

fat

(d)

sucrose

Which one of the following substance is not a constituent of sweat?

(a)

Urea

(b)

Protein

(c)

Water

(d)

Salt

The act of bringing swallowed food back to the mouth is called___________

(a)

egestion

(b)

ingestion

(c)

micturition

(d)

regurgitation

Which one of the following is an example for wireless connections?

(a)

Wi-Fi

(b)

Electric wires

(c)

VGA

(d)

USB

Pen drive is _______device.

(a)

Output

(b)

Input

(c)

Storage

(d)

connecting cable

A bit has a single binary value either __________ or __________

(a)

1,-1

(b)

0,1

(c)

1,2

(d)

2,0

The size of an air bubble rising up in water

(a)

decreases

(b)

increases

(c)

remains same

(d)

may increase or decrease

In a pressure cooker, the food is cooked faster because

(a)

increased pressure lowers the boiling point

(b)

increased pressure raises the boiling point

(c)

decreased pressure raises the boiling point

(d)

increased pressure lowers the melting point

When a solid is partly or wholly immersed in a fluid, it experiences an apparent loss in ____________.

(a)

weight

(b)

buoyant force

(c)

liquid displaced

(d)

None

A musical instrument is producing continuous note. This note cannot be heard by a person having a normal hearing range. This note must then be passing through

(a)

wax

(b)

vacuum

(c)

water

(d)

empty vessel

If the speed of a wave is 340 m s^-1 and its frequency is 1700 Hz, then wavelength λ for this wave in cm will be

(a)

34

(b)

20

(c)

15

(d)

0.2

A Sonar device on a submarine send out a signal and receives an echo 5 seconds later. Calculate the speed of sound it water if the distance of the object from the submarine is 3500 m.

(a)

1440 ms^-1

(b)

1460 ms^-1

(c)

1400 ms^-1

(d)

1550 ms^-1

Who proposed the heliocentric model of the universe?

(a)

Tycho Brahe

(b)

Nicolaus Copernicus

(c)

Ptolemy

(d)

Archimedes

The Big Bang occurred ________ years ago.

(a)

13.7 billion

(b)

15 million

(c)

15 billion

(d)

20 million

Which of the following units is used to measure distance between the stars?

(a)

km

(b)

m

(c)

light year

(d)

fm

Raagav brings his lunch every day to school in a plastic container which has resin code number 5. The container is made of

(a)

Polystyrene

(b)

PVC

(c)

Polypropylene

(d)

LDPE

Graphene is one atom thick layer of carbon obtained from

(a)

Diamond

(b)

Fullerene

(c)

Graphite

(d)

Gas Carbon

What is the minimum number of carbon atoms of an alkane must have to form an isomer?

(a)

4

(b)

3

(c)

2

(d)

1

One Nanometre is

(a)

10^-7 metre

(b)

10^-8 metre

(c)

10^-6 metre

(d)

10^-9 metre

Which of the following does not contain natural dyes?

(a)

Potato

(b)

Beetroot

(c)

Carrot

(d)

Turmeric

Paracetamol is an _____________.

(a)

Analgesics

(b)

Antipyretics

(c)

Antiseptic

(d)

Antimalarial

Increased amount of ___________ in the atmosphere, results in greenhouse effect and global warming

(a)

carbon monoxide

(b)

sulphur dioxide

(c)

nitrogen dioxide

(d)

carbon dioxide

Identify the incorrect statement with respect to adaptations of earthworm.

(a)

Earthworm has a stream lined body with no antennae or fins.

(b)

Each segment of earthworm has setae.

(c)

Many earthworms become inactive in a process called hibernation, during winter season.

(d)

Earthworms remain in its burrow during day time, to avoid sunlight.

Which cycie involves transpiration?

(a)

Water cycle

(b)

Nitrogen cycle

(c)

Carbon cycle

(d)

All the above

Binomial name of Nilavembu is

(a)

Leucas aspera

(b)

Andrographis paniculata

(c)

Crotolaria juncea

(d)

Cassia fistula

The symbiotic association of fungi and vascular plants is

(a)

Lichen

(b)

Rhizobium

(c)

Mycorhizae

(d)

Azotobacter

Apiculture is the rearing of ____________.

(a)

Silk worm

(b)

Bacteria

(c)

Apex culture

(d)

Honey bees

One of the means of indirect transmission of a disease is

(a)

sneezing

(b)

coughing

(c)

vectors

(d)

droplet infection

Severity of disease symptom depends upon

(a)

number of microbes

(b)

target organ

(c)

both a and b

(d)

none of these.

Flagella arranged along the sides of the bacteria _____________.

(a)

Peritrichous

(b)

Monotrichous

(c)

Lophotrichous

(d)

Amphitrichous

Which of the following is correct?

(a)

Free and Open source

(b)

Free and Traditional software

(c)

Passive and Open source

(d)

Passive and Traditional source

LINUX is a

(a)

Paid Software

(b)

Licensed Software

(c)

Free and Proprietary software

(d)

Free and Open source software