The unit of ‘g’ is m s^-2. It can be also expressed as ______.

(a)

cms^-1

(b)

Nkg^-1

(c)

Nm²kg^-1

(d)

cm²s^-2

A convex lens forms a real, diminished point sized image at focus. Then the position of the object is at

(a)

focus

(b)

infinity

(c)

at 2f

(d)

between f and 2f

In the Given diagram, the possible direction of heat energy transformation is

(a)

A\(\leftarrow\)B, A\(\leftarrow\)C, B\(\leftarrow\)C

(b)

A\(\rightarrow\)B, A\(\rightarrow\)C, B\(\rightarrow\)C

(c)

A\(\rightarrow\)B, A\(\leftarrow\)C, B\(\rightarrow\)C

(d)

A\(\leftarrow\)B, A\(\rightarrow\)C, B\(\leftarrow\)C

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

Gamma radiations are dangerous because

(a)

it affects eyes & bones

(b)

it affects tissues

(c)

it produces genetic disorder

(d)

it produces enormous amount of heat

In the nuclear reaction ₆X¹² \(\overset { \alpha \ decay }{ \longrightarrow } \) _zY^A, the value of A & Z.

(a)

8, 6

(b)

8, 4

(c)

4, 8

(d)

cannot be determined with the given data

Which of the following represents 1 amu?

(a)

Mass of a C – 12 atom

(b)

Mass of a hydrogen atom

(c)

1/12^th of the mass of a C – 12 atom

(d)

Mass of O – 16 atom

In the aluminothermic process the role of Al is _____.

(a)

oxidizing agent

(b)

reducing agent

(c)

hydrogenating agent

(d)

sulphurising agent

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

The chemical equation Na₂SO_4(aq) + BaCl_2(aq) → BaSO_4(s)↓ + 2NaCl_(aq) represents which of the following types of reaction?

(a)

Neutralisation

(b)

Combustion

(c)

Precipitation

(d)

Single displacement

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

Which is formed during anaerobic respiration

(a)

Carbohydrate

(b)

Ethyl alcohol

(c)

Acetyl CoA

(d)

Pyruvate

The body of leech has

(a)

23 segments

(b)

33 segments

(c)

38 segments

(d)

30 segments

A patient with blood group O was injured in an accident and has blood loss. Which group of blood should be used by doctor for transfusion?

(a)

O group

(b)

AB group

(c)

A and B group

(d)

All blood group

Node of Ranvier is found in

(a)

muscles

(b)

axons

(c)

dendrites

(d)

cyton

LH is secreted by

(a)

Adrenal gland

(b)

Thyroid gland

(c)

Anterior pituitary

(d)

Hypothalamus.

What is true of gametes?

(a)

They are diploid

(b)

They give rise to gonads

(c)

They produce hormones

(d)

They are formed from gonads

The number of chromosomes found in human beings are __________________.

(a)

22 pairs of autosomes and 1 pair of allosomes.

(b)

22 autosomes and 1 allosome

(c)

46 autosomes

(d)

46 pairs autosomes and 1 pair of allosomes.

We can cut the DNA with the help of

(a)

scissors

(b)

restriction endonucleases

(c)

knife

(d)

RNAase