-
A solid is melted and allowed to cool and solidify again. The temperature is measured at equal intervals of time. The graph below shows the change of temperature with time.
The part of the curve that is practically horizontal is due to
-
latent heat given away by the liquid
-
specific heat given away by the liquid
-
thermal capacity changes with time keeping temperature constant
-
change in density during transforma tion
-
A deep sea diver may hurt his ear drum during diving because of
(a) lack of oxygen
(b) high atmospheric pressure
(c) high water pressure
(d) All of the above
-
When you walk on a woolen carpet and bring your finger near the metallic handle of a door an electric shock is produced. This is because
-
charge is transferred from your body to the handle
-
a chemical reaction occurs when you touch the handle
-
the temperature of the human body is higher than that of the handle
-
the human body and the handle arrive at thermal equilibrium by the process
-
Which one among the following does not wet the walls of the glass vessel in which it is kept ?
(a) Water (b) Alcohol (c) Mercury (d) Phenol
-
Permanent hardness of water is due to the presence of
-
sulphates of sodium and potassium
-
sulphates of magnesium and calcium
-
carbonates of sodium and magnesium
-
bicarbonates of magnesium and calcium
-
In the reaction ZnO + C → Zn + CO, ‘C’ acts as
(a) an acid (b) a base
(c) an oxidising agent (d) a reducing agent
-
Which of the following are the charac teristics of organic farming ?
-
Use of chemical fertilizers to improve soil fertility.
-
Frequent decomposing and fal lowing.
-
Use of herbs to control pests.
4. Higher productivity per hectare.
Select the correct answer using the code given below:
(a) 1 and 4 only (b) 1, 3 and 4
(c) 2 and 3 only (d) 2, 3 and 4
-
‘Yakuts’ are the nomadic herders of
(a) Gobi (b) Sahara (d) Tundra (d) Kalahari
-
A fanner in a semi-arid area claims that his farming practice is very environment friendly. Which of the following practices on his farm can justify his claim?
-
Planting a tree belt.
-
Practising crop rotation.
-
Carrying out a large scale irrigation system.
-
Using organic fertilizers.
Select the correct answer using the code given below:
-
3 and 4 only (b) 1, 2 and 4
(c) 1, 3 and 4 (d) 1 and 2 only
-
The luxuriant growth of natural vegeta tion in tropical rainforest is due to
-
fertile soil.
-
hot and wet climate throughout the year.
-
intense sunlight for photosynthesis.
-
seasonal change to facilitate nutrient absorption.
Select the correct answer using the code given below:
(a) 1 and 4 only (b) 2 and 3 only
(c) 1, 2 and 3 only (d) 1, 2, 3 and 4
-
Which endocrine gland requires iodine to synthesize a particular hormone whose deficiency may cause goitre disease ?
(a) Hypothalamus (b) Pancreas
(c) Thymus (d) Thyroid gland
-
Which one of the following is not a part of nerves ?
(a) Axons (b) Connective tissues
(c) Schwann cells (d) Smooth muscles
-
The product of conductivity and resistivity of a conductor
-
depends on pressure applied
-
depends on current flowing through conductor
-
is the same for all conductors
-
varies from conductor to conductor
-
We use CFL to save electrical energy and to provide sufficient light. The full form of CFL is
-
Condensed filament light
-
Compact filament lamp
-
Condensed fluorescent lamp
-
Compact fluorescent lamp
-
When the sun is 30° above the horizon, shadow of one tree is 17-3 m long. What is the height of this tree?
(a) 20 m (b) 17·30 m (c) 10m (d) 1·73 m
-
When beat rays are reflected from Earth, gases like Carbon dioxide, Nitrous oxide do not allow them to escape back to the space causing our planet to heat up. These gases are known as
-
Noble gas (b) Green-house gas
(c) Hot gas (d) Blue gas
-
A spring can be used to determine the mass m of an object in two ways : (i) by measuring the extension in the spring due to the object; and (ii) by measuring the oscillation period for the given mass. Which of these methods can be used in a space-station orbiting Earth?
-
Both
-
Only the extension method
-
Only the oscillation method
4. Neither
-
Match List I with List II and select the correct answer using the code given below the Lists:
List I List II
(Region) (Vegetation)
A. Selvas 1. Conifers
B. Savannas 2. Mosses and Lichens
C. Taiga 3. Epiphytes
D. Tundra 4. Grasses and trees
Code:
-
|
A
|
B
|
C
|
D
|
(a)
|
4
|
1
|
2
|
3
|
(b)
|
3
|
2
|
1
|
4
|
(c)
|
3
|
4
|
1
|
2
|
(d)
|
4
|
2
|
1
|
3
| -
Which of the following statements with regard to the western coastal plain of India are correct ?
-
It is a narrow belt.
-
It is an example of submerged coastal plain.
-
It provides natural conditions for development of ports.
-
It has well developed deltas.
Select the correct answer using the code given below:
-
1, 2 and 3 only (b) 1 and 2 only
-
1, 2, 3 and 4 (d) 3 and 4 only
-
Which one of the following weather conditions indicates a sudden fall in barometer reading ?
(a) Stormy weather
(b) Calm weather
(c) Cold and dry weather
(d) Hot and sunny weather
111. Match List I with List II and select the correct answer using the code given below the Lists:
List I List II
(Island) (Location)
A. Continental island 1. Mauritius
B. Coral island 2. Madagascar
C. Volcanic island 3. Andaman and Nicobar islands
D. Mountain island 4. Maldives
Code :
A B C D
(a) 2 4 1 3
(b) 2 1 4 3
(c) 3 1 4 2
(d) 3 4 1 2
-
Consider the following diagram :
In which one among the following lettered areas of the diagram would erosion most likely change the shapes of the riverbed ?
-
Match List I with List II and select the correct answer using the code given below the Lists:
List I List II
(Cloud) (Characteristic)
A. Cirrus 1. Rain giving
B. Stratus 2. Feathery appearance
C. Nimbus 3. Vertically growing
D. Cumulus 4. Horizontally spreading
Code:
-
|
A
|
B
|
C
|
D
|
(a)
|
3
|
1
|
4
|
2
|
(b)
|
3
|
4
|
1
|
2
|
(c)
|
2
|
4
|
1
|
3
|
(d)
|
2
|
1
|
4
|
3
|
Dostları ilə paylaş: | 
