Newton’s III law is applicable

(a)

for a body is at rest

(b)

for a body in motion

(c)

both a & b

(d)

only for bodies with equal masses

Magnification of a convex lens is

(a)

Positive

(b)

negative

(c)

either positive or negative

(d)

zero

If a substance is heated or cooled, the linear expansion occurs along the axis of

(a)

X or –X

(b)

Y or –Y

(c)

both (a) and (b)

(d)

(a) or (b)

In a simple circuit, why does the bulb glow when you close the switch?

(a)

The switch produces electricity

(b)

Closing the switch completes the circuit.

(c)

Closing the switch breaks the circuit.

(d)

The bulb is getting charged.

The velocity of sound in air at a particular temperature is 330 ms^-1. What will be its value when temperature is doubled and the pressure is halved?

(a)

330 ms^-1

(b)

165 ms^-1

(c)

330 x \(\sqrt { 2 } \) ms^-1

(d)

320/\(\sqrt { 2 } \) ms^-1

____________ isotope is used for the treatment of cancer.

(a)

Radio Iodine

(b)

Radio Cobalt

(c)

Radio Carbon

(d)

Radio Nickel

Which of the following statement is incorrect?

(a)

12 gram of C – 12 contains Avogadro’s number of atoms.

(b)

One mole of oxygen gas contains Avogadro’s number of molecules

(c)

One mole of hydrogen gas contains Avogadro’s number of atoms

(d)

One mole of electrons stands for 6.023 × 10²³ electrons.

Chemical formula of rust is ________.

(a)

FeO.xH₂O

(b)

FeO₄.xH₂O

(c)

Fe₂O₃.xH₂O

(d)

FeO

Identify the non aqueous solution.

(a)

sodium chloride in water

(b)

glucose in water

(c)

copper sulphate in water

(d)

sulphur in carbon di sulphide

Photolysis is a decomposition reaction caused by __________

(a)

heat

(b)

electricity

(c)

light

(d)

mechanical energy

Which of the following pairs can be the successive members of a homologous series?

(a)

C₃H₈ and C₄H₁₀

(b)

C₂H₂ and C₂H₄

(c)

CH₄ and C₃H₆

(d)

C₂H₅OH and C₄H₈OH

The endarch condition is the characteristic feature of

(a)

root

(b)

stem

(c)

leaves

(d)

flower

The segments of leech are known as

(a)

Metameres (somites)

(b)

Proglottids

(c)

Strobila

(d)

All the above

During transpiration there is loss of

(a)

Carbon dioxide

(b)

Oxygen

(c)

Water

(d)

None of the above

There are ________ pairs of cranial nerves and _______ pairs of spinal nerves.

(a)

12, 31

(b)

31, 12

(c)

12, 13

(d)

12, 21