Which one of the following sources provides evidences for evolution?
A)
Homologous organs
done
clear
B)
Analogous organs
done
clear
C)
Fossils
done
clear
D)
All of these
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is not a noble gas?
A)
Argon
done
clear
B)
Krypton
done
clear
C)
Xenon
done
clear
D)
Radon
done
clear
E)
None of these
done
clear
View Answer play_arrow
Write a balanced chemical equation for the reaction 'methane burns in oxygen to form carbon dioxide and water'.
A)
\[C{{H}_{4}}+{{O}_{2}}\to C{{O}_{2}}+{{H}_{2}}O\]
done
clear
B)
\[C{{O}_{2}}+2{{H}_{2}}O\to C{{H}_{4}}+2{{O}_{2}}\]
done
clear
C)
\[C{{H}_{4}}+2{{O}_{2}}\to C{{O}_{2}}+{{H}_{2}}O\]
done
clear
D)
\[C{{H}_{4}}+2{{O}_{2}}\to C{{O}_{2}}+2{{H}_{2}}O\]
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is the reducing agent in the given chemical equation? \[CuO+{{H}_{2}}\to Cu+{{H}_{2}}O\]
A)
\[CuO\]
done
clear
B)
\[{{H}_{2}}\]
done
clear
C)
(c)\[Cu\]
done
clear
D)
\[{{H}_{2}}O\]
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following type of reaction is represented by the given chemical equation? \[2Na+2{{H}_{2}}O\to 2NaOH+{{H}_{2}}\]
A)
Combination reaction
done
clear
B)
Decomposition reaction
done
clear
C)
Single displacement reaction
done
clear
D)
Double displacement reaction
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following constitutes a food chain?
A)
Grass, wheat, cactus and mango
done
clear
B)
Grass, fish, goat, zebra
done
clear
C)
Grass, grasshopper, frog, snake
done
clear
D)
Lion, tiger, bear and elephant
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following can reproduces by the asexual method of reproduction?
A)
Hydra
done
clear
B)
Planaria
done
clear
C)
Spirogyra
done
clear
D)
All of these
done
clear
E)
None of these
done
clear
View Answer play_arrow
The non-directional movement of a plant part in response to the touch of an object is called:
A)
Phototropism
done
clear
B)
geotropism
done
clear
C)
Thigmonasty
done
clear
D)
photo nasty
done
clear
E)
None of these
done
clear
View Answer play_arrow
Observe the following figures and choose the correct option.
A)
pH of I is greater than that of II and III
done
clear
B)
pH of IV is less than that of I and III
done
clear
C)
pH of I is less than that of III and IV
done
clear
D)
pH of III is greater than that of II and IV
done
clear
E)
None of these
done
clear
View Answer play_arrow
The Bishoni community of Rajasthan is associated with the conservation of:
A)
Coal and petroleum
done
clear
B)
forest and wildlife
done
clear
C)
Water resources
done
clear
D)
abiotic environment
done
clear
E)
None of these
done
clear
View Answer play_arrow
Name the organisms belonging to the second and fourth trophic levels in the food chain comprising the following: Frog, plant, snake, hawk, insect
A)
Insect and snake
done
clear
B)
Plant and hawk
done
clear
C)
Snake and hawk
done
clear
D)
Frog and snake
done
clear
E)
None of these
done
clear
View Answer play_arrow
A student adds a few drops of universal indicator to a dilute solution of sodium bicarbonate taken in a test tube. Which of the following colours would he observe?
A)
Dark red
done
clear
B)
Red
done
clear
C)
Orange
done
clear
D)
Orange yellow
done
clear
E)
None of these
done
clear
View Answer play_arrow
A common property of all the bases is that they all produce ________when dissolved in water.
A)
Hydrogen ions
done
clear
B)
hydroxide ions
done
clear
C)
Oxygen ions
done
clear
D)
helium ions
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following metals does no react with cold water to form metal hydroxide and hydrogen?
A)
Sodium
done
clear
B)
Potassium
done
clear
C)
Aluminum
done
clear
D)
Calcium
done
clear
E)
None of these
done
clear
View Answer play_arrow
In which one of the following molecules double covalent bond is present?
A)
\[C{{l}_{2}}\]
done
clear
B)
\[C{{H}_{4}}\]
done
clear
C)
\[{{H}_{2}}O\]
done
clear
D)
\[{{O}_{2}}\]
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is not a pair of homologous organs?
A)
Forelimbs of a human and forelimbs of a bat
done
clear
B)
Forelimbs of a bat and forelimbs of a bird
done
clear
C)
Forelimbs of a liza rd and forelimbs of a human
done
clear
D)
Forelimbs of a fro g and forelimbs of a bird
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is an unsaturated hydrocarbon?
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following periods in modern periodic table is incomplete?
A)
First period
done
clear
B)
Fourth period
done
clear
C)
Third period
done
clear
D)
Seventh period
done
clear
E)
None of these
done
clear
View Answer play_arrow
The atom of an element has electronic configuration 2, 8, 5. In which one of the following groups the element should be placed in modern periodic table?
A)
Group 1
done
clear
B)
Group 3
done
clear
C)
Group 5
done
clear
D)
Group 15
done
clear
E)
None of these
done
clear
View Answer play_arrow
What would be the reading of ammeter and voltmeter in the given circuit?
A)
Ammeter = 3A, Voltmeter = 1V
done
clear
B)
Ammeter = 1A, Voltmeter = 3V
done
clear
C)
Ammeter =3A, Voltmeter = 2V
done
clear
D)
Ammeter = 2A, Voltmeter = 3V
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following properties of magnetic lines of force around a straight conductor is incorrect?
A)
The magnetic lines of force are in the form of concentric circles around a straight conducting wire
done
clear
B)
The plane of the magnetic lines of force is perpendicular to the straight conductor
done
clear
C)
The strength of the magnetic field is directly proportional to the distance from the conductor
done
clear
D)
All of these
done
clear
E)
None of these
done
clear
View Answer play_arrow
An electron enters a magnetic field at right angles to it, as shown in the figure below. The direction of force acting on the electron will be:
A)
to the right
done
clear
B)
to the left
done
clear
C)
out of the page
done
clear
D)
into the page
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following components of AC generator consists of large number of turns of insulated copper wire wound over a soft iron core?
A)
Armature
done
clear
B)
Slip rings
done
clear
C)
Brushes
done
clear
D)
Commutator
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which of the following substances absorb excess neutrons released during the fission reaction in a nuclear reactor?
A)
Moderator
done
clear
B)
Control rods
done
clear
C)
Coolant
done
clear
D)
Steam turbine
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is a constituent of biogas?
A)
Methane
done
clear
B)
Carbon dioxide
done
clear
C)
Hydrogen
done
clear
D)
All of these
done
clear
E)
None of these
done
clear
View Answer play_arrow
The point on the retina, where the optic nerves leaves the eye ball to go to the brain has no rods or cones. This point is known as:
A)
Dark spot
done
clear
B)
Yellow spot
done
clear
C)
Blind spot
done
clear
D)
Visible spot
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following helps to protect the stomach wall from its own secretions of hydrochloric acids?
A)
Pepsin enzyme
done
clear
B)
Mucus
done
clear
C)
Partially digested food
done
clear
D)
Roughage
done
clear
E)
None of these
done
clear
View Answer play_arrow
The oxygen from water diffuses into the body of amoeba through its:
A)
Lenticels
done
clear
B)
spiracles
done
clear
C)
Moist skin
done
clear
D)
cell membrane
done
clear
E)
None of these
done
clear
View Answer play_arrow
The urine collected in the bladder passed out from the body through:
A)
Urethra
done
clear
B)
ureter
done
clear
C)
Tubule
done
clear
D)
renal artery
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following types of receptors detects smell?
A)
Photoreceptors
done
clear
B)
Photoreceptors
done
clear
C)
Gustatory receptors
done
clear
D)
olfactory receptors
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is not a part of human male reproductive system?
A)
Seminal vesicles
done
clear
B)
Testes
done
clear
C)
Fallopian tube
done
clear
D)
Epididymis
done
clear
E)
None of these
done
clear
View Answer play_arrow
The pouch-like air-sacs at the ends of the bronchioles are called:
A)
Trachea
done
clear
B)
pharynx
done
clear
C)
Alveoli
done
clear
D)
bronchus
done
clear
E)
None of these
done
clear
View Answer play_arrow
A man having blood group A marries a woman having blood group O and they have a child. Which one of the following blood group is not possible for the child?
A)
A
done
clear
B)
O
done
clear
C)
AB
done
clear
D)
All of these
done
clear
E)
None of these
done
clear
View Answer play_arrow
What is the common name of 2-pentanone?
A)
Methyl propyl ketone
done
clear
B)
Dimethyl ketone
done
clear
C)
Methyl butyl ketone
done
clear
D)
Methyl ethyl keto ne
done
clear
E)
None of these
done
clear
View Answer play_arrow
An electric heater of power 1000 W has a resistance of 10 Q. Calculate the magnitude of current.
A)
10 A
done
clear
B)
12 A
done
clear
C)
13 A
done
clear
D)
14 A
done
clear
E)
None of these
done
clear
View Answer play_arrow
If a 12 V battery connected to the arrangement of resistances given below, calculate the total current flowing in the circuit.
A)
0.2 A
done
clear
B)
1.2 A
done
clear
C)
60 A
done
clear
D)
120 A
done
clear
E)
None of these
done
clear
View Answer play_arrow
A convex lens has a focal length 20 cm. Find power of the lens.
A)
\[+\,2D\]
done
clear
B)
\[-\,2D\]
done
clear
C)
\[+\,5D\]
done
clear
D)
\[-\,5D\]
done
clear
E)
None of these
done
clear
View Answer play_arrow
A ray of light goes from a medium of refractive index \[{{n}_{1}}\] to a medium of refractive index \[{{n}_{2}}\]. The angle of incidence is i and the angle of refraction is r. Then, sin i/sin r is equal to:
A)
\[{{n}_{1}}\]
done
clear
B)
\[{{n}_{2}}\]
done
clear
C)
\[{{n}_{1}}/{{n}_{2}}\]
done
clear
D)
\[{{n}_{2}}/{{n}_{1}}\]
done
clear
E)
None of these
done
clear
View Answer play_arrow
An object of size of 7 cm is placed at a distance of 27 cm in front of concave mirror of focal length 18 cm. At what distance from the mirror, should a screen be placed so that a sharp focused image can be obtained?
A)
18 cm in front of the mirror
done
clear
B)
18 cm behind the mirror
done
clear
C)
27 cm in front of the mirror
done
clear
D)
54 cm in front of the mirror
done
clear
E)
None of these
done
clear
View Answer play_arrow
A concave lens has a focal length of 20 cm. At what distance should the object from the lens be placed so that it forms an image at 15 cm from the lens?
A)
20 cm
done
clear
B)
30 cm
done
clear
C)
40 cm
done
clear
D)
60 cm
done
clear
E)
None of these
done
clear
View Answer play_arrow