A force is applied by direct physical contact between two bodies is

(a)

Contact force

(b)

Non - contact force

(c)

Balanced force

(d)

Unbalanced force

At constant temperature volume is inversely proportional to pressure of a gas is known as

(a)

Boyle's law

(b)

Charles

(c)

Avogadro

(d)

None

1 Ampere =

(a)

\(\frac{1\ coulomb}{1\ minute}\)

(b)

\(\frac{1\ coulomb}{1\ second}\)

(c)

\(\frac{1 \text { coulomb }}{1 \text { second }^{2}}\)

(d)

\(\frac{second}{coulomb}\)

Sound propagates maximum in

(a)

gas

(b)

liquid

(c)

solid

(d)

all

Roentgen (R) is the unit to measure _________.

(a)

X - ray strength

(b)

number of holes produced by X - rays

(c)

radiation exposure

(d)

number of cancer cells

What is the mass of 12.044 x 10²³ number of O₂ molecules?

(a)

8 g

(b)

16 g

(c)

32 g

(d)

64 g

Which among the following are the ores of aluminium?
(i) Bauxite
(ii) Cryolite
(iii) Corundum.

(a)

Both (i) and (ii)

(b)

Only

(c)

Only (iii)

(d)

(i), (ii) and (iii)

Give an example of unsaturated solution ___________

(a)

16g of NaCl in 100 g of water

(b)

36g of NaCl in 100 g of water

(c)

45g of NaCl in 100 g of water

(d)

100 g of NaCl in 36 g of water

Conjunctive tissue in monocot root, is made up of _____________

(a)

Parenchyma

(b)

Collenchyma

(c)

Sclrenchyma

(d)

Xylem

In larger organisms transport of nutrients, salts, oxygen, hormones and waste products around the body are performed by the _______________ system.

(a)

Excretory

(b)

Circulatory

(c)

Digestive

(d)

Respiratory