The mass of a body is measured on planet Earth as M kg. When it is taken to a planet of radius half that of the Earth then its value will be ____kg

(a)

4 M

(b)

2 M

(c)

M/4

(d)

M

The physical quantity which is the measure of inertia is _______

(a)

density

(b)

weight

(c)

force

(d)

mass

A body of mass 1 kg is attracted by the earth with a force which is equal to

(a)

9.8 N

(b)

6.67 x 10¹¹

(c)

1 N

(d)

9.8 ms^-1

Which of the following lens would you prefer to use while reading small letters found in a dictionary?

(a)

A convex lens of focal length 5 cm

(b)

A concave lens of focal length 5 cm

(c)

A convex lens of focal length 10 cm

(d)

A concave lens of focal length 10 cm

The group of rays is ______

(a)

lines

(b)

dots

(c)

beam

(d)

none of these

A convex lens forms a virtual image if the object is

(a)

at F

(b)

At infinity

(c)

below F and 2 F

(d)

below the lens and the principal focus

Simple microscopes are used

(a)

To observe paths of flower

(b)

Watch repair

(c)

Observe finger prints

(d)

All the above

Thermal expansion at particular temperature is less in

(a)

solid

(b)

liquid

(c)

gas

(d)

all above

The resistance of material depends on.

(a)

Temperature

(b)

Length of conductor

(c)

Area of cross-section

(d)

All the above

A 110 W, 220 V bulb draws a current.

(a)

2 A

(b)

440 A

(c)

0.5 A

(d)

5.5 A

Velocity of sound in the atmosphere of a planet is 500 ms^-1. The minimum distance between the sources of sound and the obstacle to hear the echo, should be

(a)

17 m

(b)

20 m

(c)

25 m

(d)

50 m

What is the frequency range of audible sound?

(a)

20 Hz to 20 kHz

(b)

1.5 Hz to 20 kHz

(c)

10 Hz to 15 kHz

(d)

20 Hz to 25 kHz

Proton - Proton chain reaction is an example of__________

(a)

Nuclear fission

(b)

\(\alpha\) - decay

(c)

Nuclear fusion

(d)

\(\beta\) - decay

Complete the reaction: ₈₈Ra²²⁶ ➝ ₈₆Rn²²²+ ?

(a)

_-1e⁰

(b)

₁e^o

(c)

₂He⁴

(d)

₀n¹

BARC is situated at ________.

(a)

Trombay

(b)

Kalpakkam

(c)

Trivandrum

(d)

Thumba

The gram molecular mass of oxygen molecule is

(a)

16 g

(b)

18 g

(c)

32 g

(d)

17 g

Which of the contains maximum number of molecules

(a)

1 g of CO₂

(b)

1g of N₂

(c)

1 g of H₂

(d)

1 g of CH₄

Which of the following have inert gases 2 electrons in the outermost shell.

(a)

He

(b)

Ne

(c)

Ar

(d)

Kr

Potassium belongs to ________ period

(a)

First

(b)

Second

(c)

Third

(d)

Fourth

Deliquescence is due to __________

(a)

Strong affinity to water

(b)

Less affinity to water

(c)

Strong hatred to water

(d)

Inertness to water

A single displacement reaction is represented by X_(s) + 2HCl_(aq) → XCl_2(aq) + H_2(g). Which of the following(s) could be X. (i) Zn (ii) Ag (iii) Cu (iv) Mg. Choose the best pair.

(a)

i and ii

(b)

ii and iii

(c)

iii and iv

(d)

i and iv

Acids have pH

(a)

less than 7

(b)

greater than 7

(c)

equal to 7

(d)

less than 14

TFM in soaps represents ___________ content in soap

(a)

mineral

(b)

vitamin

(c)

fatty acid

(d)

carbohydrate

Ethanol is used as ______________

(a)

a preservative for biological specimen

(b)

an antifreeze

(c)

an antiseptic

(d)

all the above

Mammals are ______________ animals.

(a)

Cold blooded

(b)

Warm blooded

(c)

Poikilothermic

(d)

All the above

Each kidney is made up of several___________

(a)

mascula

(b)

nephrons

(c)

cortex

(d)

epididymis

Normal pulse rate ranges from________

(a)

80-90/min

(b)

70 -90/min

(c)

50 - 60/min

(d)

70 - 80/min

Nerve cells do not possess

(a)

neurilemma

(b)

sarcolemma

(c)

axon

(d)

dendrites

Pons is a bridge of ______

(a)

neuron

(b)

nerve fibre

(c)

neuroglia

(d)

glial cells

Syngamy results in the formation of____________

(a)

Zoospores

(b)

Conidia

(c)

Zygote

(d)

Chlamydospores

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.

rDNA is a

(a)

vector DNA

(b)

circular DNA

(c)

recombinant of vector DNA and desired DNA

(d)

satellite DNA

What are the steps will you adopt for better waste management?

(a)

reduce the amount of waste formed

(b)

reuse the waste

(c)

recycle the waste

(d)

all of the above

Which is used to edit programs?

(a)

Inkscape

(b)

script editor

(c)

stage

(d)

sprite