Mock Test: विज्ञान (भाग-IV)

QUESTION 91

If the amplitude of loudness of sound becomes twice, then loudness increases by a factor of:

A

2

B

4

C

8

D

16

QUESTION 92

The range of gravitational force is:

A

10-14 m

B

Infinite

C

10-15 m

D

1 m

QUESTION 93

Bioluminescence occurs in:

A

Coelenterata and Ctenophora

B

Ctenophora and Porifera

C

Porifera and Coelenterata

D

All options are right

QUESTION 94

A force F = 2i + 3j + 6k Newton acts on a 5 kg object for 10 second, then the change in velocity of object will be:

A

12 m/s

B

14 m/s

C

24 m/s

D

36 m/s

QUESTION 95

Lichens are very good pollution indicators. They are made up of:

A

Prions and Algae

B

Fungi and Prions

C

Phycobiont and Mycobiont

D

Prions and Euglenoids

QUESTION 96

Which of the following is not appropriate to understand science at upper primary stage?

A

Observing things and recordings

B

Plotting graphs

C

Hands on experience

D

Learn the subject through abstraction

QUESTION 97

Gibbons, proboscis monkeys and Rhinoceros found in which of the following subregion of oriental Zoogeographical region?

A

Indian subregion

B

Ceylonian subregion

C

Indo-China subregion

D

Indo-Malayan subregion

QUESTION 98

The chief producers in oceans are:

A

Dinoflagellates

B

Diatoms

C

Euglenoids

D

Planktons

QUESTION 99

In following which is element of physical science lesson?

A

Title of lesson

B

Introduction

C

Presentation

D

All options are right

QUESTION 100

Which of the following represents the correct number of moles of each element in 40 g of Ferric sulphate? [Atomic mass Fe = 56 u, S = 32 u, O = 16 u]

A

Fe 2, S 3, O 12

B

Fe 1, S 1, O 4

C

Fe 0.2, S 0.3, O 1.2

D

Fe 0.1, S 0.1, O 0.4

QUESTION 101

The wall of alimentary canal possess four layer's. Which of the following is the correct sequence from outside to inside?

A

Mucosa → Muscularis → Submucosa → Serosa

B

Serosa → Muscularis → Submucosa → Mucosa

C

Submucosa → Mucosa → Muscularis → Serosa

D

Mucosa → Submucosa → Muscularis → Serosa

QUESTION 102

A light is refracted through a prism. The angle of deviation is:

A

The angle between incident ray and emergent ray

B

The angle between incident ray and refracted ray

C

The angle between refracted ray and emergent ray

D

The angle of prism

QUESTION 103

In which of the following is developing stage of process of action research?

A

Developing an action plan

B

Implementation plan and collecting data

C

Identified and limiting the topic

D

Sharing and communicating the results

QUESTION 104

Match the Column-I with Column-II: Column-I: (a) Photochemical decomposition, (b) Thermal decomposition, (c) Electrolysis, (d) Displacement reaction; Column-II: (i) 2KClO3(s) → 2KCl(s) + 3O2(g), (ii) 2Al2O3(m) → 4Al(s) + 3O2(g), (iii) Mg(s) + CuSO4(aq) → MgSO4(aq) + Cu(s), (iv) 2AgBr(s) → 2Ag(s) + Br2(g)

A

(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)

B

(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

C

(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)

D

(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)

QUESTION 105

If an object is moving with constant acceleration along one direction only, then the distance travelled in the nth second is: [Take U = Initial Velocity, a = Acceleration]

A

U + a (1 + n²)

B

U + (a/2)(2n - 1)

C

U + (a/2)(2n + 1)

D

U + (a/2)(2n + 1)²

QUESTION 106

When an electron is passing through magnetic field, then:

A

Its velocity is increased

B

Its energy is increased

C

Both velocity and energy are increased

D

Velocity and energy of electron remain constant

QUESTION 107

Study the given Venn diagram carefully. Which of the following colloidal systems correctly represent points A, B and C?

A

A: Mist, B: Whipped cream, C: Dust fumes

B

A: Milk, B: Hair cream, C: Pumice stone

C

A: Paints, B: Smoke, C: Cloud

D

A: Coloured glasses, B: Wings of butterflies, C: Butter

QUESTION 108

The minimum distance of distinct vision for young adult with normal vision is about:

A

2.5 m

B

25 cm

C

2.5 cm

D

25 m

QUESTION 109

The distance (s) travelled by a particle varies with time (t) as: s = 1.2 t² meter. The average speed during time interval 0 to 10 second is:

A

6 m/s

B

24 m/s

C

36 m/s

D

12 m/s

QUESTION 110

Which one of the following is co-curricular activity in science teaching?

A

Science club

B

Audio-visual aids

C

Text-book

D

Blackboard

QUESTION 111

Match the Column-I with Column-II: Column-I: (a) 28 g He, (b) 0.5 mole of O₂, (c) Molecular mass of common salt, (d) 1.5 mole of calcium; Column-II: (i) 58.5 u, (ii) 7 mole, (iii) 60 g, (iv) 16 g

A

(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)

B

(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)

C

(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)

D

(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)

QUESTION 112

206 g of molten sodium bromide is electrolysed. The maximum mass of sodium obtained will be: [Atomic mass Na = 23 u, Br = 80 u]

A

40 g

B

46 g

C

52 g

D

23 g

QUESTION 113

In the entire process of glycolysis, 4 phosphorylation occurs in two of the following steps: I. 1-3 Diphosphoglyceric acid → 3-phosphoglyceric acid, II. Phosphoenol Pyruvic acid → Pyruvic acid, III. 2-phosphoglyceric acid → phosphoenol pyruvic acid, IV. 3-phosphoglyceric acid → 2-phosphoglyceric acid

A

Only I and II

B

Only II and III

C

Only III and IV

D

Only I and IV

QUESTION 114

Match the mixture given in Column-I with their method of separation given in Column-II: Column-I: (a) Oil mixed with water, (b) Iron powder mixed with flour, (c) Salt mixed with water, (d) Kidney beans mixed with rice flour; Column-II: (i) Sieving, (ii) Decantation, (iii) Magnet, (iv) Evaporation

A

(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

B

(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

C

(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)

D

(a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)

QUESTION 115

A bulb of 210 W will produce heat in calorie within 5 minutes? [Take 4.2 J = 1 cal.]

A

63,000 cal

B

80,000 cal

C

15,000 cal

D

10,500 cal

QUESTION 116

The scientist who first explained that cells divide and new cells are formed from pre existing cells is:

A

Walther Flemming

B

Rudolf Virchow

C

Robert Hooke

D

Schleiden and Schwann

QUESTION 117

Which of the following are exothermic processes? (i) Reaction of water with quick lime, (ii) Dilution of an acid, (iii) Evaporation of water, (iv) Sublimation of camphor (crystals)

A

(i) and (ii)

B

(ii) and (iii)

C

(i) and (iv)

D

(ii) and (iv)

QUESTION 118

Which is correct option in following?

A

Sliding friction > Rolling friction > Static friction

B

Rolling friction > Sliding friction > Static friction

C

Rolling friction > Static friction > Sliding friction

D

Static friction > Sliding friction > Rolling friction

QUESTION 119

The chemical formula of cryolite is:

A

Al₂O₃·2H₂O

B

Na₃AlF₆

C

Na₂AlF₆

D

NaAlF₃

QUESTION 120

Which one of these phylum possess closed circulatory system?

A

Annelida

B

Arthropoda

C

Mollusca

D

Echinodermata

QUESTION 121

A porter lifts a luggage of 15 kg from ground and puts it on his head 2.0 m above the ground. The work done by porter on the luggage is: [Take g = 10 m/s²]

A

300 Nm

B

30 Nm

C

600 Nm

D

3 Nm

QUESTION 122

Which of the following set of fishes are edible?

A

Catla, Rohu, Hilsa and Pomfret

B

Prawn, Sardines, Lobsters and Rohu

C

Prawn, Lobsters, Crab and Oysters

D

Rohu, Mackerel, Lobsters and Crab

QUESTION 123

What are the primary lymphoid organs in the body?

A

Spleen and lymph nodes

B

Tonsils and payer's patches

C

Bone marrow and thymus

D

Thymus and appendix

QUESTION 124

Which of the following statement is not true?

A

When a candle burns, both physical and chemical changes take place.

B

Anaerobic bacteria digest animal waste and produce biogas.

C

Depositing a layer of iron on zinc is called galvanization.

D

Stretching of rubber band is a physical change.

QUESTION 125

When glomerular filtration rate falls which of the following hormone is released to stimulate glomerular blood flow?

A

ADH (Antidiuretic hormone)

B

Renin

C

Angiotensin

D

Aldosterone

QUESTION 126

Which of the following species is critically endangered reptile in India?

A

Gharial

B

Bengal Monitor

C

Common Skink

D

Green Turtle

QUESTION 127

A convex mirror has a radius of curvature of 3.0 m. If a object is located at 5 m from the mirror, then position of image is:

A

+2.14 m

B

-1.15 m

C

-2.14 m

D

+1.15 m

QUESTION 128

The kinetic energy of an object of mass m moving with velocity 5 m/s is 25 J. If velocity of this object increased by three times, then kinetic energy will be:

A

225 J

B

75 J

C

450 J

D

375 J

QUESTION 129

Which one of these is a excitatory neurotransmitter?

A

Glycine

B

Dopamine

C

Acetylcholine

D

GABA (Gamma Aminobutyric Acid)

QUESTION 130

Which of the following is the correct sequence of succession in plants?

A

Xerarch → Hydrarch → Mesic

B

Xerarch → Mesic → Hydrarch

C

Mesic → Xerarch → Hydrarch

D

Hydrarch → Mesic → Xerarch

QUESTION 131

In which the following mirror is used as rear view in vehicle?

A

Convex mirror

B

Concave mirror

C

Both convex and concave mirror together

D

None of these

QUESTION 132

The hydrophilic end of a synthetic detergent is:

A

CH₃ – (CH₂)₁₀ – CH₂ –

B

CO₃⁻ Na⁺

C

SO₃⁻ Na⁺

D

COO⁻ Na⁺

QUESTION 133

One of the following is hormone secreted from Heart:

A

Atrial Natriuretic Factor

B

Noradrenaline

C

Vasopressin

D

Adrenaline

QUESTION 134

How many facial bones are there in the skull of human?

A

8

B

14

C

22

D

2

QUESTION 135

The apparatus given below is used to study the diffusion of a number of gases at the same temperature and pressure. Which of the following pairs of gases would diffuse into vacuum at the same speed? (Given atomic mass of H = 1 u, C = 12 u, N = 14 u, O = 16 u)

A

NH₃ and H₂

B

CO and SO₂

C

CO and N₂

D

NH₃ and N₂

QUESTION 136

Which of the following is the correct arrangement of the given metals in descending order of their reactivity? Zinc, Iron, Magnesium, Sodium

A

Zinc > Iron > Magnesium > Sodium

B

Sodium > Magnesium > Iron > Zinc

C

Sodium > Zinc > Magnesium > Iron

D

Sodium > Magnesium > Zinc > Iron

QUESTION 137

The process of release of sperm from seminiferous tubule is known as:

A

Ejaculation

B

Spermatogenesis

C

Spermiogenesis

D

Spermiation

QUESTION 138

Which of the following statement is correct with respect to flame?

A

Outer zone of the flame is its hottest part where complete combustion takes place.

B

Middle zone of the flame is of red coloured.

C

Innermost zone of the flame is moderately hot.

D

Innermost zone of the flame is of blue coloured.

QUESTION 139

At a height h above the earth's surface the fractional change in the value of acceleration due to gravity is: [Given R - Radius of earth]

A

h/R

B

1 - 2h/R

C

2h/R

D

1 + 2h/R

QUESTION 140

In which of the following media speed of sound wave is greater?

A

Air

B

Glass (Flint)

C

Water

D

Vacuum

QUESTION 141

A block of mass 5 kg is kept on a tabletop. If block have length 10 cm, breadth 20 cm and height 40 cm, then pressure exerted by block of mass 5 kg on the tabletop is: [Take g = 9.8 m/s²]

A

612.5 N/m²

B

2450 N/m²

C

1225 N/m²

D

6125 N/m²

QUESTION 142

Which of the following statement is true?

A

Southern blotting technique is developed by Alvine et.al. (1979).

B

Northern blotting technique is developed by Broome and Gilbert (1978).

C

Western blotting technique is developed by Towbin et.al. (1979).

D

E. M. Southern (1975) purified IgG.

QUESTION 143

Light enters from air to glass having refractive index 1.50. If the speed of light in vacuum is 3 × 10⁸ m/s, then speed of light in the glass is:

A

0.5 × 10⁸ m/s

B

1 × 10⁸ m/s

C

3 × 10⁸ m/s

D

1.5 × 10⁸ m/s

QUESTION 144

Which of the following is an acid-base indicator?

A

Vinegar

B

Lime water

C

Turmeric

D

Baking soda

QUESTION 145

Which of the following statement best describes the nature of science?

A

Scientists are totally objective in their work.

B

The scientific method is the only guide for conducting research.

C

Science is a system of beliefs.

D

Science is social in nature.

QUESTION 146

The offsprings produced after asexual reproduction are:

A

Only morphologically same

B

Only genetically same

C

Morphologically and genetically same

D

Morphologically and genetically different

QUESTION 147

Which of these is used in extraction of metals?

A

Coke

B

Coal gas

C

Coaltar

D

Petroleum

QUESTION 148

Which of the following statements are correct? I. Housefly have sponging type of mouthparts. II. Honey-bee have biting and chewing type of mouthparts. III. Butterflies have siphoning type of mouthparts. IV. Cockroaches have chewing and lapping type of mouthparts.

A

Only II and III

B

Only I and III

C

Only I and II

D

Only II and IV

QUESTION 149

A brown coal, low in carbon content (60-70%), high in moisture content and generally used in power plants to produce electricity is:

A

Peat

B

Lignite

C

Bituminous

D

Anthracite

QUESTION 150

Which of the following statements are correct? (i) Temperature changes during the change of a state. (ii) Dry ice gets converted directly into gaseous state under normal atmospheric conditions. (iii) Higher boiling points of liquid indicates weaker intermolecular forces. (iv) Latent heat of vaporization is generally higher than the latent heat of fusion for a substance.

A

(i) and (iv)

B

(ii) and (iv)

C

(ii) and (iii)

D

(iii) and (iv)