Clouds float in atmosphere because of their low

(a)

density

(b)

pressure

(c)

velocity

(d)

mass

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

Which of the following vibrates when a musical note is produced by the cymbals in a orchestra?

(a)

stretched strings

(b)

stretched membranes

(c)

air columns

(d)

metal plates

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

The maximum speed of vibrations which produces audible sound will be in

(a)

seawater

(b)

ground glass

(c)

dry air

(d)

Human blood

When the pitch of note by a harmonium is lowered, then the wave length of the note

(a)

first decreases and then increases

(b)

decreases

(c)

remains the same

(d)

increases

Which of the following can produce longitudinal waves as well as transverse waves under different conditions?

(a)

TV transmitter

(b)

tuning fork

(c)

water

(d)

slinky

Who proposed the heliocentric model of the universe?

(a)

Tycho Brahe

(b)

Nicolaus Copernicus

(c)

Ptolemy

(d)

Archimedes

Ceres is a _______.

(a)

Meteor

(b)

Star

(c)

Planet

(d)

Astroid

Number of free electron(s) in each carbon of graphite is

(a)

one

(b)

Two

(c)

Three

(d)

Four

Which of the following does not contain double bond

(a)

CO₂

(b)

C₂H₄

(c)

HCl

(d)

O₂

Plastics made of Polycarbonate (PC) and Acrylonitrile Butadiene Styrene (ABS) are made of resin code ___________

(a)

2

(b)

5

(c)

6

(d)

7

The lead pencil contains

(a)

Graphite

(b)

Diamond

(c)

Lead

(d)

Charcoal

Plastic resin codes are shown as three chasing arrows in a ______________ with a number in the middle or letters (an acronym of that plastic type).

(a)

Logo

(b)

Recycling symbol

(c)

Square

(d)

Triangle

The antibiotic Penicillin is obtained from ___________ 

(a)

plant

(b)

microorganism

(c)

animal

(d)

sunlight

This type of food protect us from deficiency diseases.

(a)

Carbohydrates

(b)

Vitamins

(c)

Proteins

(d)

Fats

The ice sheets from the north and south poles and the icecaps on the mountains, get converted into water vapour through the process of ______________.

(a)

evaporation

(b)

condensation

(c)

sublimation

(d)

infiltration

The production and management of fish is called

(a)

Pisciculture

(b)

Sericulture

(c)

Aquaculture

(d)

Monoculture

The symbiotic association of fungi and vascular plants is

(a)

Lichen

(b)

Rhizobium

(c)

Mycorhizae

(d)

Azotobacter

The most fatal form of Malaria is caused by

(a)

Plasmodium ovale

(b)

Plasmodium falciparum

(c)

Plasmodium malariae

(d)

Plasmodium vivax

The weight of the body immersed in a liquid appears to be_____________ than its actual weight.

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lesser

A sound wave has a frequency of 4 k hz and wavelength 2 m. Then the velocity of sound is ____________ .

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800 m/s or 8000 rns^-1

The rotational period of the Sun near its poles is ________.

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more

Different methods of formation of carbon is the main reason for its ____________.

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Allotropy

Ganoderma lucidum, is commonly known as __________ mushroom.

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Lingzhi Mushroom

The weight of fluid displaced determines the buoyant force on an object.

(a) True

(b) False

Hydraulic press is used in the extraction of oil from oil seeds.

(a) True

(b) False

ISS is a proof for international cooperation.

(a) True

(b) False

Satellites nearer to the Earth should have lesser orbital velocity.

(a) True

(b) False

Poorly developed root is an adaptation of mesophytes.

(a) True

(b) False

Aestivation is an adaptation to overcome cold condition.

(a) True

(b) False

Anthraquinones is obtained from Ocimum sanctum.

(a) True

(b) False

Ongole is an exotic breed of cattle.

(a) True

(b) False

One of the differences between virus and viroid is the presence of protein coat in viroid and its absence in virus.

(a) True

(b) False

The process of vaccination was developed by Jenner.

(a) True

(b) False

ORS

HIV

DPT

WHO

BCG