Q1. Work done is measured by: (a) force x distance (b) mass x velocity (c) force x energy (d) none of the these
Answer: Force x distance
Q2. Joule is the unit of: (a)Mass (b) Work (c) Energy (d) Velocity
Answer: work
Q3. A body at rest can have: (a) Energy (b) Power (c) Momentum (d) Velocity
Answer: Energy
Q4. Newton-metre is the unit of: (a) Speed (b) Energy (c) Gravitational intensity (d) Work
Answer: Work
Q5. Ns is equivalent to (a)Nm-1s (b) kg ms-1 (c)kg ms-2 (d)kg ms-3
Answer: kg ms-1
Q6. Kg m2s-2 is associated with (a) Work (b) Speed (c) Energy (d) Momentum
Answer: Energy
Q7.A flying Aeroplan possesses (a)Only potential energy (b) Only kinetic energy (c) Both potential and kinetic energy (d) None of these
Answer: Both potential and kinetic energy
Q8.The kinetic energy of a body is increased most by doubling its: (a) Speed (b) Density (c) Weight (d) Mass
Answer: Speed
Q9. A wound watch spring has: (a)No energy stored in it (b) Mechanical P.E. stored in it (c) Mechanical K.E. stored in it (d) None of these
Answer: Mechanical P.E. stored in it
Q10. In the oscillation of a simple pendulum, the sum of the P.E.andK.E. is: (a) constant (b) Minimum (c) Maximum (d) Infinitive
Answer: Constant
Q11. When the speed of a moving object is doubled, its: (a) Weight is doubled (b) Kinetic energy increased four times (c) Kinetic energy is doubled (d) None of these
Answer: Kinetic energy increased four times
Q12. The kinetic energy of the body decrease by 10% what is the percentage decreases in momentum (a) 50 (b) 40 (c) 30 (d) None of these
Answer: None of these
Q13.The kinetic energy of a body decreases by 36% what is the percentage decrease in momentum (a) 18 (b) 19 (c) 20 (d) 21
Answer: 20
Q14. The mass of a body P is twice that of body Q, but the speed of half of that of Q. The Kinetic energies of p and q are in the ratio of (a) 1: 2 (b) 2 : 1 (c) 1 : 4 (d) 4 : 1
Answer: 1 : 2
Q15. A photocell converts light energy into: (a) Physical energy (b) chemical energy (c) electrical energy (d) heat energy
1.A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goalkeeper to
(a) Exert large force on the ball
(b) Increases the force exerted by the ball on hands
(c) Increase the rate of change of momentum
(d) Decrease the rate of change of momentum
Answer:(d) Decrease the rate of change of momentum
2. An object of mass 2 kg is sliding with a constant velocity of 4 m/s on a friction less horizontal table. The force required to keep the object moving with the same velocity is:
(a) 32 N
(b) 0 N
(c) 2 N
(d) 8 N
Answer:(b) 0 N
3. Newton’s third law of motion explains the two forces namely ‘action’ and ‘reaction’ coming into action when the two bodies are in contact with each other. These two forces:
(a) Always act on the same body
(b) Always act on the different bodies in opposite directions
(c) Have same magnitude and direction
(d) Acts on either body at normal to each other
Answer:(b) Always act on the different bodies in opposite directions
4.In a rocket, a large volume of gases produced by the combustion of fuel is allowed to escape through its tail nozzle in the downward direction with the tremendous speed and makes the rocket to move upward.
Which principle is followed in this take off of the rocket?
(a) Moment of inertia
(b) Conservation of momentum
(c) Newton’s third law of motion
(d) Newton’s law of gravitation
Answer:(b) Conservation of momentum
5.A water tank filled upto 2/3 of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would
(a) Move backward
(b) Move forward
(c) Come to the rest
(e) Be unaffected
Answer: (b) Move forward
6.Velocity versus time graph of a ball of mass 50 g rolling on a concrete floor is shown in the figure below. What will be the frictional force of the floor on the ball?
(a) 0.5 N
(b) 50 N
(c) 5 N
(d) 0.05 N
Answer:(a) 0.5 N
7.The seat belts are provided in the cars so that if the car stops suddenly due to an emergency braking, the persons sitting on the front seats are not thrown forward violently and saved from getting injured. Can you guess the law due to which a person falls in forward direction on the sudden stopping of the car?
(a) Newton’s first law of motion
(b) Newton’s second law of motion
(c) Newton’s third law of motion
(d) Newton’s law of gravitation
Answer:(a) Newton’s first law of motion
8.When a balloon held between the hands is pressed, its shape changes. This happens because:
(a) Balanced forces act on the balloon
(b) Unbalanced forces act on the balloon
(c) Frictional forces act on the balloon
(d) Gravitational force acts on the balloon
Answer:(a) Balanced forces act on the balloon
9.Which of the following situations involves the Newton’s second law of motion?
(a) A force can stop a lighter vehicle as well as a heavier vehicle which are moving
(b) A force exerted by a lighter vehicle on collision with a heavier vehicle results in both the (vehicles coming to a standstill
(c) A force can accelerate a lighter vehicle more easily than a heavier vehicle which are moving
(d) A force exerted by the escaping air from a balloon in the downward direction makes the balloon to go upwards
Answer:(c) A force can accelerate a lighter vehicle more easily than a heavier vehicle which are moving
10.The speed of a car weighing 1500 kg increases from 36 km/h to 72 km/h uniformly. What will be the change in momentum of the car?
(a) 15000 kg km/h
(b) 15000 kg m/s
(c) 54000 kg m/s
(d) 54000 g m/s
Answer:(b) 15000 kg m/s
11. A passenger in a moving train tosses a coin which falls behind him. Observing this statement what can you say about the motion of the train?
(a) Accelerated
(b) Retarded
(c) Along circular tracks
(d) Uniform
Answer:(a) Accelerated
12. Newton’s first law of motion says that a moving body should continue to move forever , unless some external forces act on it. But a moving cycle comes to rest after some time if we stop pedaling it. Can you choose the correct reason for the stoppage of cycle?
i. Air resistance
ii. Gravitational pull of the earth
iii. Friction of the road
iii. Heat of the environment
Choose the correct option:
(a) (iii) and (iv)
(b) (i) and (iii)
(c) (i) and (ii)
(d) (ii) and (iii)
Answer:(b) (i) and (iii)
13. A man wearing a bullet-proof vest stands on roller skates. The total mass is 80 kg. A bullet of mass 20 g is fired at 400 m/s. It is stopped by the vest and falls to the ground. What is then the velocity of the man?
(a) 1 m/s
(b) 0.1 m/s
(c) 0.01 m/s
(d) 0 m/s
Answer:(b) 0.1 m/s
14. The unit of measuring the momentum of a moving body is:
Question 1. A particle is moving in a circular path of radius r. The displacement after half a circle would be: (a) Zero (b) πr (c) 2r (d) 2πr
Answer: (c) 2r
Question 2. A body is thrown vertically upward with velocity u, the greatest height h to which it will rise is, (a) ulg (b) u2l2g (c) u2lg (d) ul2g
Answer: (b) u2l2g
Question 3. The numerical ratio of displacement to distance for a moving object is (a) always less than 1 (b) always equal to 1 (c) always more than 1 (d) equal or less than 1
Answer: (d) equal or less than 1
Question 4. If the displacement of an object is proportional to square of time, then the object moves with (a) uniform velocity (b) uniform acceleration (c) increasing acceleration (d) decreasing acceleration
Answer: (b) uniform acceleration
Question 5. From the given υ – t graph, it can be inferred that the object is (a) in uniform motion (b) at rest (c) in non-uniform motion (d) moving with uniform acceleration
Answer: (a) in uniform motion
Question 6. Suppose a boy is enjoying a ride on a merry-go-round which is moving with a constant speed of 10 ms-1 It implies that the boy is (a) at rest (b) moving with no acceleration (c) in accelerated motion (d) moving with uniform velocity
Answer: (c) in accelerated motion
Question 7. Area under a υ -1 graph represents a physical quantity which has the unit (а) m2 (b) m (c) m3 (d) ms-1
Answer: (b) m
Question 8. Four cars A, B, C and D are moving on a levelled road. Their distance versus time graphs are shown in the adjacent figure. Choose the correct statement. (a) Car A is faster than car D. (b) Car B is the slowest. (c) Car D is faster than car C. (d) Car C is the slowest.
Answer: (b) Car B is the slowest.
Question 9. Which of the following figures correctly represents uniform motion of a moving object? Answer
Answer: (a)
Question 10. Slope of a velocity-time graph gives (a) the distance (b) the displacement (c) the acceleration (d) the speed
Answer: (c) the acceleration
Question 11. In which of the following cases of motions, the distance moved and the magnitude of displacement are equal? (a) If the car is moving on a straight road (b) If the car is moving in Circular path (c) The pendulum is moving to and fro (d) The earth is revolving around the sun.
Answer: (a) If the car is moving on a straight road
Question 12. A boy goes from A to B with a velocity of 20 m/min and comes back from B to A with a velocity of 30 m/min. The average velocity of the boy during the whole journey is (a) 24 m/min (b) 25 m/s (c) Zero (d) 20 m/min
Answer: (a) 24 m/min
Question 13. Velocity-time graph of an object is given below. The object has (a) Uniform velocity (b) Uniform speed (c) Uniform retardation (d) Variable acceleration
Answer: (c) Uniform retardation
Question 14. Which one of the following graphs shows the object to be stationary?
Answer: (b)
Question 15. A body is projected vertically upward from the ground. Taking vertical upward direction as positive and point of projection as origin, the sign of displacement of the body from the origin when it is at height h during upward and downward journey will be (a) Positive, positive (b) Positive, negative (c) Negative, negative (d) Negative, positive
Q1.Whittaker proposed the classification of organisms into ? 1. Five kingdom 2.One kingdom 3.Nine kingdom 4.Zero kingdom
Answer. Five kingdom
Q2.Five kingdom classification, was proposed by ? 1.Huxley 2.Linnaeus 3.Whittaker 4.Haeckel
Answer. Whittaker
Q3.In Whittaker’s classification the unicellular organisms having various cell organelles included in kingdom of 1.Fungi 2. Bacteria 3. Plant tea 4.Protista
Answer. Protista
Q4.In five kingdom classification, the blue green algae, nitrogen fixing bacteria and archaebacteria are included in the kingdom of ? 1. Algae 2. Bacteria 3. Fungi 4.Monera
Answer. Monera
Q5. The five kingdom classification is based on complexity of ? 1. Cell structure 2. Body of organisms 3. Body body structure 4. Body structure and cell structure
Answer. Body of organisms
Q6. Which one of the following hierarchical categories is the top taxonomic category? 1. Class 2. Kingdom 3. gems 4. Organism
Answer. Class
Q7. Which is the fundamental basic taxonomic unit of classification is 1.Organism 2.Order 3.Species 4. Defined organelles
Answer. Species
Q8. In which one of the following charter members of the monera kingdom differ from other kingdoms ? 1. Defined nucleus 2 Defined organelles 3. Defined body 4. None of these
Answer. Defined organelles
Q9. Fern is an example of 1. Thallophyta 2. Protein 3. Nuclear 4.Pteridophyta
Answer.Pteridophyta
Q10.Which one of the following is a gymnosperm ? 1.Cycas 2.Hydra 3.Bryophyta 4.Moss
Answer. Cycas
Q11.An eukaryotic cell does not has: 1.Cell membrane 2.Plasma membrane 3.Nucleus not surrounded by a membrane 4.Single-cell
Question 1. Which of the following tissues has dead cells? (a) Parenchyma (b) Sclerenchyma (c) Collenchyma (d) Epithelial tissue
Answer: (b) Sclerenchyma
Question 2. Find out incorrect sentence. (a) Parenchymatous tissues have intercellular spaces. (b) Collenchymatous tissues are irregularly thickened at corners. (c) Apical and intercalary meristems are permanent tissues. (d) Meristematic tissues, in its early stage, lack vacuoles.
Answer: (c) Apical and intercalary meristems are permanent tissues.
Question 3. Girth of stem increases due to (a) apical meristem (b) lateral meristem (c) intercalary meristem (d) vertical meristem
Answer: (b) lateral meristem
Question 4. Which cell does not have perforated cell wall? (a) Tracheid’s (b) Companion cells (c) Sieve tubes (d) Vessels
Answer: (b) Companion cells
Question 5. Intestine absorbs the digested food materials. What type of epithelial cells are responsible for that? (a) Stratified squamous epithelium (b) Columnar epithelium (c) Spindle fibers (d) Cuboidal epithelium
Answer: (b) Columnar epithelium
Question 6. A person met with an accident in which two long bones of thehand were dislocated. Which among the following may be the possible reason? (a) Tendon break (b) Break of skeletal muscle (c) Ligament break (d) Areolar tissue break
Answer: (c) Ligament break
Question 7. While doing work and running, you move your organs Like hands, legs etc. Which among the following is correct? (a) Smooth muscles contract and pull the ligament to move the bones. (b) Smooth muscles contract and pull the tendons to move the bones. (c) Skeletal muscles contract and pull the ligament to move the bones. (d) Skeletal muscles contract and pull the tendon to move the bones.
Answer: (d)Skeletal muscles contract and pull the tendon to move the bones.
Question 8. Which muscles act involuntarily? (i) Striated muscles (ii) Smooth muscles (iii) Cardiac muscles (iv) Skeletal muscles (a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (d) (i) and (iv)
Answer: (b) (ii) and (iii)
Question 9. Meristematic tissues in plants are (a) localized and permanent (b) not limited Lo certain regions (c) localized and dividing cells (d) growing in volume
Answer: (c) localized and dividing cells
Question 10. Which is not a function of epidermis? (a) Protection from adverse condition (b) Gaseous exchange (c) Conduction of water (d) Transpiration
Answer: (c) Conduction of water
Question 11. Select the incorrect sentence. (a) Blood has a matrix containing proteins, salts and hormones (b) Two bones are connected by ligament (c) Tendons are non-fibrous tissue and fragile (d) Cartilage is a form of connective tissue
Answer: (c) Tendons are non-fibrous tissue and fragile
Question 12. Cartilage is not found in (a) nose (b) ear (c) kidney (d) larynx
Answer: (c) kidney
Question 13. Fats are stored in human body as (a) Cuboidal epithelium (b) Adipose tissue (c) Bones (d) Cartilage
Answer: (b) Adipose tissue
Question 14. Bone matrix is rich in (a) Fluoride and calcium (b) Calcium and phosphorus (c) Calcium and potassium (d) Phosphorus and potassium
Answer: (b) Calcium and phosphorus
Question 15. Contractile proteins are found in (a) bones (b) blood (c) muscles (d) cartilage
(a) The concentration of water molecules in the cell is higher than the concentration of water molecules in the surrounding medium.
(b) The concentration of water molecules in the surrounding medium is higher than the concentration of water molecules in the cell.
(c) The concentration of water molecules is same in the cell and in the surrounding medium
(d) The concentration of water molecules does not matter.
Answer: (b) The concentration of water molecules in the surrounding medium is higher than the concentration of water molecules in the cell.
2. Whichof the following statement marks as a difference between plant cell and animal cell?
(a) Plant cells have cell wall which animal cells do not.
(b) Plant cells do not have vacuole while animal cells do have.
(c) Plant cells have only cell membrane while animal cells have both cell wall as well as cell membrane.
(d) Plant cells have more plastids while animal cells have few plastids.
Answer: (a) Plant cells have cell wall which animal cells do not.
3.Endoplasmic reticulum one of the cell organelles, exists as a membranous network that extends from outer membrane of nucleus to the plasma membrane making a connection between them.
Which of the following statements is not related to the endoplasmic reticulum?
(a) It behaves as transport channel for proteins between nucleus and cytoplasm.
(b) It transports materials between various regions in cytoplasm.
(c) It can be the site of energy generation.
(d) It can be the site of some biochemical activities of the cell.
Answer: (c) It can be the site of energy generation.
4.Osmosis is a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one. Can you pick out the option among the following which does not belong to this process?
(a) The movement of water across a semipermeable membrane is affected by the amount of substances dissolved in it.
(b) Membranes are made of organic molecules such as proteins and lipids.
(c) Molecules soluble in organic solvents can easily pass through the membrane.
(d) Plasma membranes contain chitin sugar in plants.
Answer: (d) Plasma membranes contain chitin sugar in plants.
5.The nucleus controls all the activities of the cell and acts as a site of DNA material and protein synthesis. It is composed of some components which all together give the nucleus its functionality. Here is shown a figure of nucleus with some of its components labeled as A, B, C and D. can you name these components correctly?
(a) A – Nucleons; B – Chromatin; C – Nuclear membrane; D – Nucleoplasm
(b) A – Nucleus; B – Chromatin; C – Nuclear membrane; D – Nucleoplasm
(c) A – Nucleolus; B – Chromatin; C – Nuclear membrane; D – Nucleoplasm
(d) A – Nucleolus; B – Chromatin; C – Nuclear membrane; D – Nuclear wall
Answer: (c) A – Nucleolus; B – Chromatin; C – Nuclear membrane; D – Nucleoplasm
6. You must have observed that a fruit when unripe is green but it becomes beautifully coloured when ripe. According to you what is the reason behind this colour change.
(a) Chloroplasts change to chromosplasts
(b) Chromosplasts change to chromosomes
(c) Chloroplasts change to chromosomes
(d) Chromosplasts change to chloroplasts
Answer: (a) Chloroplasts change to chromosplasts
7. Rahul’s mother was going to make pickle. For this she cut the vegetables into small pieces and put them in the sun for few hours. Rahul was observing all her activities very curiously and asked his mother if why she had put the salted vegetables in the sun. among the following what might be the most appropriate answer for his question?
(a) So that the pickle may get extra flavour.
(b) So that the cut vegetables may absorb the vitamin d as a nutrient from the sun rays.
(c) So that the vegetables may lose all the water by diffusion and evaporation and become dry.
(d) So that the salt may get evenly and properly absorbed by the vegetables.
Answer: (c) So that the vegetables may lose all the water by diffusion and evaporation and become dry.
8.The process of plasmolysis in plant cell is defined as:
(a) Breakdown of plasma membrane in hypotonic solution.
(b) Shrinkage of cytoplasm in hypertonic medium.
(c) Shrinkage of Nucleoplasm.
(d) None of these.
Answer: (b) Shrinkage of cytoplasm in hypertonic medium.
9. Mitochondria are the sites of respiration in the cell. They oxidize carbohydrates and fats present in the cell to produce carbon dioxide, water and a lot of energy. The energy so released is stored in the form of ATP molecules. Since mitochondria in the cell are used to synthesize energy so, they are also called:
(a) Energy currency of the cell
(b) Energy generator of the cell
(c) Kitchen of the cell
(d) Power house of the cell
Answer: (d) Power house of the cell
10. Cell is the structural and functional unit of life. The word cell is derived from the Latin word ‘cellula’ which means “a little room”. Can you name the scientist who coined the term cell?
(a) Robert Hooke
(b) Anton Von Leeuwenhoek
(c) Robert Brown
(d) Ernst Haeckel
Answer: (a) Robert Hooke
11. In a test, a teacher collected the answers written by four students as the definition of osmosis as given below. Read carefully and select the correct one.
(a) Movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane.
(b) Movement of solvent molecules from its higher concentration to lower concentration.
(c) Movement of solvent molecules from higher concentration to lower of solution through a permeable membrane.
(d) Movement of solute molecules from lower concentration to higher concentration of solution through a semipermeable membrane.
Answer: (a) Movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane.
12. Among the following statements which one is incorrect?
(a) Golgi apparatus is involved with formation of lysosomes.
(b) Nucleus, mitochondria and plastid have DNA, hence they are able to make their own structural proteins.
(c) Lysosomes are called the suicide bags as they eat up their own cells.
(d) Cytoplasm is called known as protoplasm.
Answer: (d) Cytoplasm is called known as protoplasm.
13. Anjali wanted to eat rice and kidney bean (rajmah). She requested her mother to cook the same on next day. At night her mother took a cup of kidney beans and put them in a container having some water and the kept the container covered overnight. Next day it was observed that the kidney beans got swollen and were ready to be cooked. What is this phenomenon due to which kidney beans got swollen is known as?
(i) Osmosis
(ii) Diffusion
(iii) Endosmosis
(iv) Exosmosis
Choose the correct option among the following:
(a) Only (iii)
(b) Both (i) and (iii)
(c) Both (i) and (iv)
(d) Only (i)
Answer: (b) Both (i) and (iii)
14. A vacuole is a space or cavity within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid. They are a kind of storage sacs that are very large sized in plant cell as compared to that in the animal cell.
Which among the following is not a function of the vacuole?
(a) They help to store the toxic metabolic by-products of the plant cell.
(b) They provide turgidity and rigidity to the plant cell.
(c) They help to maintain the osmotic pressure in the cell.
(d) They help the plant in its growth by the process of cell division.
Answer: (d) They help the plant in its growth by the process of cell division.
15.The proteins and lipids, essential for building the cell membrane, are manufactured by:
Answer
