Rulers, measuring tapes and metre scales are used to measure

(a)

Mass

(b)

Weight

(c)

Time

(d)

Length

Slope of the velocity - time graph gives

(a)

speed

(b)

displacement

(c)

distance

(d)

acceleration

_________ is used as reflectors in torchlight.

(a)

concave mirror

(b)

convex mirror

(c)

plane mirror

(d)

None of these

The constituents that form a mixture are also called

(a)

Elements

(b)

Compounds

(c)

Alloys

(d)

Components

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 tropic movement that helps the climbing vines to find a suitable support is ________. 

(a)

phototropism

(b)

geotropism

(c)

thigmotropism

(d)

chemotropism

Mesoglea is present in

(a)

Porifera

(b)

Coelenterata

(c)

Annelida

(d)

Arthropoda

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

_________ belongs to the generation IV of the computer

(a)

Microprocessor

(b)

Artificial intelligence

(c)

Transistor

(d)

Vaccum Tubes

The specific heat capacity of water is

(a)

4200 Jkg^-1K^-1

(b)

420 Jg^-1K^-1

(c)

0.42 Jg^-1K^-1

(d)

4.2 Jkg^-1K^-1

Modern periodic law states that the physical and chemical properties of elements are the periodic functions of their__________

(a)

atomic numbers

(b)

atomic masses

(c)

similarities

(d)

anomalies

Atoms having 1, 2 or 3 electrons in its valence shell will readily form_____________

(a)

cation

(b)

anion

(c)

Calcium

(d)

electron

Acids in plants and animals are organic acids. Whereas acids in rocks and minerals are_________

(a)

Inorganic acids

(b)

Weak acids

(c)

citric acid

(d)

ascorbic acid

The fibres consists of

(a)

Parenchyma

(b)

Sclerenchyma

(c)

Collenchyma

(d)

None of above

To prevent the entry of food into the trachea, the opening is guarded by__________

(a)

epiglottis

(b)

glottis

(c)

hard palate

(d)

soft palate