To measure the diameter of a thin wire_________is used.

(a)

Screw gauge

(b)

Water gauge

(c)

Meter gauge

(d)

Wind gauge

The centre of the reflecting surface of a spherical mirror is _____________________

(a)

centre of curvafure

(b)

focus

(c)

pole

(d)

radius of curvature

Particles of matter are in constant motion as they possess ______energy.

(a)

potential

(b)

kinetic

(c)

solar

(d)

wind

Our bodies contain radioisotopes such as ___________which continuously emit radiation.

(a)

Potassium 40

(b)

Iodine 131

(c)

Cobalt 60

(d)

Carbon 14

___________________% of water is used to produce carbohydrates by the plants.

(a)

0.01%

(b)

0.001%

(c)

0.1%

(d)

0.6%.

The length of Bluewhale is_________.

(a)

15 m

(b)

20 m

(c)

25 m

(d)

35 m

Identify the gas which prevents the growth of fungus.

(a)

Nitrogen

(b)

Oxygen

(c)

Carbon-di-oxide

(d)

Hydrogen

The resistance of a straight conductor is independent of__________

(a)

temperature

(b)

material

(c)

cross sectional area

(d)

shape of cross section

The function of phloem  fibres is__________

(a)

passage of food

(b)

store food

(c)

mechanical strength

(d)

preparation of food

Curdling of milk protein is done by___________

(a)

pepsin

(b)

rennin

(c)

lipase

(d)

maltase

_____________plays an important role in a computer as an inpute device

(a)

Keyboard

(b)

Scanner

(c)

Printer

(d)

Mouse

Heavy trucks are fitted with six to eight wheels, As area increases, Pressure will ___________.

(a)

decrease

(b)

increase

(c)

remains the same

Which of the following statement best describes frequency?

(a)

the number of complete vibrations per second.

(b)

the distance travelled by a wave per second.

(c)

the distance between one crest of wave and the next one.

(d)

the maximum disturbance caused by a wave.

Speed of sound in solids does not depend upon __________.

(a)

temperature

(b)

density

(c)

medium

(d)

pressure

Stars in a constellation form _____________.

(a)

No shape

(b)

any arbitrary shape

(c)

a recognisable shape

(d)

a straight line always

Hydrocarbons on burning in the air give CO₂ and _____________.

(a)

Water and heat

(b)

CO and Heat

(c)

Water and CO

(d)

Water and Sulphur dioxide

Which of the following does not contain natural dyes?

(a)

Potato

(b)

Beetroot

(c)

Carrot

(d)

Turmeric

____________ Present in the lemon juice acts as electrolyte.

(a)

Sulphuric acid

(b)

Nitric acid

(c)

Hydrochloric acid

(d)

Citric acid

Which part of plant consisting Nitrogen fixing bacteria?

(a)

Roots

(b)

Stems

(c)

Leaves

(d)

All the above

The primary organ infected during tuberculosis is

(a)

bone marrow

(b)

intestine

(c)

spleen

(d)

lungs