CBSE Class 7 Science All Chapters MCQs Set A
Refer to CBSE Class 7 Science All Chapters MCQs Set A provided below available for download in Pdf. The MCQ Questions for Class 7 Science with answers are aligned as per the latest syllabus and exam pattern suggested by CBSE, NCERT and KVS. Multiple Choice Questions for All Chapters are an important part of exams for Class 7 Science and if practiced properly can help you to improve your understanding and get higher marks. Refer to more Chapter-wise MCQs for CBSE Class 7 Science and also download more latest study material for all subjects
नीचे दिए गए CBSE कक्षा 7 विज्ञान के सभी अध्यायों के MCQ सेट A को देखें जो पीडीएफ में डाउनलोड के लिए उपलब्ध हैं। कक्षा 7 विज्ञान के लिए MCQ प्रश्न उत्तर के साथ CBSE, NCERT और KVS द्वारा सुझाए गए नवीनतम पाठ्यक्रम और परीक्षा पैटर्न के अनुसार संरेखित हैं। सभी अध्यायों के लिए बहुविकल्पीय प्रश्न कक्षा 7 विज्ञान के लिए परीक्षाओं का एक महत्वपूर्ण हिस्सा हैं और यदि ठीक से अभ्यास किया जाए तो आपको अपनी समझ को बेहतर बनाने और उच्च अंक प्राप्त करने में मदद मिल सकती है। CBSE कक्षा 7 विज्ञान के लिए अधिक अध्याय-वार MCQ देखें और सभी विषयों के लिए अधिक नवीनतम अध्ययन सामग्री भी डाउनलोड करें
MCQ for Class 7 Science All Chapters
Class 7 Science students should refer to the following multiple-choice questions with answers for All Chapters in Class 7.
कक्षा 7 विज्ञान के छात्रों को कक्षा 7 के सभी अध्यायों के लिए निम्नलिखित बहुविकल्पीय प्रश्नों के उत्तर देखने चाहिए।
All Chapters MCQ Questions Class 7 Science with Answers
Question. Name the gas which is used by white blood cells to kill the invading bacteria.
(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen
(d) Chlorine
Answer : A
Question. What is the percentage of oxygen in the inhaled air?
(a) 21%
(b) 16.4%
(c) 18%
(d) 20%
Answer : A
Question. What is the percentage of CO2 in the exhaled air?
(a) 23%
(b) 4.4%
(c) 6%
(d) 0.04%
Answer : B
Question. Normal range of breathing rate per minute in an adult person at rest is
(a) 9 - 12,
(b) 15 - 18,
(c) 21 - 24,
(d) 30 - 33
Answer : B
Question. Muscle cramps occurs due to accumulation of
(a) Lactic acid
(b) Acetic acid
(c) Alcohol
(d) Malice acid
Answer : A
Question. During exhalation the ribs
(a) move down and inwards
(b) move upwards
(c) move outwards
(d) do not move at all
Answer : A
Question. In cockroach, air enters the body through
(a) Lungs
(b) Gills
(c) Spiracles
(d) Skin
Answer : C
Question. The air tubes in insects are called
(a) Bronchus
(b) Tracheae
(c) Nostrils
(d) blowholes
Answer : B
Question. Name the muscular sheet which separates the abdomen from the chest cavity.
(a) Diaphram
(b) Ribs
(c) Spiracles
(d) Tracheae
Answer : A
Question. Birds breathe through
(a) Lungs
(b) Kidney
(c) Spiracles
(d) Skin
Answer : A
Question. Which of the following organism can do anaerobic respiration?
(a) Yeast
(b) Leech
(c) Amoeba,
(d) Fish
Answer : A
Question. The food material used to release energy in body cells, which is considered as a biological fuel is
(a) Glucose
(b) Vitamin
(c) Water
(d) Minerals
Answer : A
Question. Snake breathe through
(a) Lungs
(b) Spiracles
(c) Tracheae
(d) Skin
Answer : A
Question. During anaerobic respiration the end product other than CO2and energy is
(a) O2
(b) Alcohol
(c) Nitrogen
(d) Water
Answer : B
Question. Name the chemical used to test the presence of CO2 in exhaled air.
(a) Lime juice
(b) Lime water
(c) Lime stone
(d) Quick lime
Answer : B
Question. Name the tiny pores present in the leaves of the plants for exchange of gases
(a) Stomata
(b) Tracheae
(c) Chloroplast
(d) Spiracles
Answer : A
Question. Yeast respire an aerobically to produce
(a) Water
(b) Alcohol
(c) Glucose
(d) Lactic acid
Answer : B
Question. The number of times a person breathe in a ______________ is termed as breathing rate
(a) Second
(b) Minute
(c) Hour
(d) Day
Answer : B
Question. Chest cavity is surrounded by
(a) 12 pair of ribs
(b) 10 pair of ribs
(c) 11 pair of ribs
(d) 25 ribs.
Answer : A
Question. Wind pipe is called
(a) Oesophagus
(b) Tracheae
(c) Bronchus
(d) Nasal Cavity
Answer : B
Question. Our _______ cells can respire anaerobically.
(a) nerve
(b) muscle
(c) germ
(d) blood.
Answer : A
Question. Respiration releases energy from the __________.
(a) air
(b) water
(c) food
(d) sunlight.
Answer : C
Question. Glucose breaks down into ___________.
(a) ascorbic acid
(b) citric acid
(c) lactic acid
Answer : C
Question. The accumulation of ______ acid causes muscle cramps.
(a) hydrochloric acid
(b) lactic acid
(c) ascorbic acid
(d) citric acid.
Answer : B
Question. The process of breakdown of food in the cell is called __________.
(a) aerobic respiration
(b) anaerobic respiration
(c) pulmonary respiration
(d) cellular respiration.
Answer : D
Question. Breathing rate is defined as number of times a person breathes in a ___________.
(a) second
(b) minute
(c) hour
(d) day.
Answer : B
Question. When we inhale air, it passes through our nostrils into the ___________.
(a) chest cavity
(b) diaphragm
(c) nasal cavity
(d) cardial cavity
Answer : C
Question. A large muscular sheet which forms the floor of the chest cavity is called
(a) lungs
(b) liver
(c) stomach
(d) diaphragm
Answer : D
Question. Smoking damages
(a) heart
(b) liver
(c) lungs
(d) spleen
Answer : C
Question. A cockroach has small openings on the sides of its body called
(a) trachea
(b) spiracles
(c) setae
(d) none
Answer : B
Question. Though frogs have a pair of lungs they can also breathe through their
(a) nose
(b) heart
(c) liver
(d) skin
Answer : D
Question. Gills help fishes to dissolve ___________ in water
(a) oxygen
(b) carbondioxide
(c) hydrogen
(d) all
Answer : A
Question. Gills are well supplied with___________for gaseous exchange
(a) oxygen
(b) carbondioxide
(c) hydrogen
(d) blood vessels
Answer : D
Question. The root cells also need__________to generate energy
(a) water
(b) sunlight
(c) oxygen
(d) chlorophyll
Answer : C
Question. In insects, the exchange of gases takes place through
(a) spiracles
(b) antennae
(c) trachea
(d) skin
Answer : C
Question. During inhalation, our lungs__________
(a) contracts
(b) exchanges gases
(c) expands
(d) releases energy
Answer : C
Question. Respiration in plants takes place through
(a) root hair
(b) chlorophyll
(c) stomata
(d) buds
Answer : C
Question. Earthworms breathe through their
(a) trachea
(b) spiracles
(c) setae
(d) skin
Answer : D
Question. Lizard and snakes have__________for breathing
(a) heart
(b) lungs
(c) skin
(d) trachea
Answer : B
Question. The percentage of carbondioxide exhaled is
(a) 21 %
(b) 0.04 %
(c) 16.4 %
(d) 4.4 %
Answer : D
Question. Human lungs are covered by two thin membranes called
(a) pleura
(b) diaphragm
(c) thoracic membrane
(d) cartilaginous membrane
Answer : A
Question. In the process of inhalation and exhalation about________of air is breathed in and out
(a) 300 ml
(b) 500 ml
(c) 800 ml
(d) 700 ml
Answer : B
Question. The total area for gas exchange provided by our 300 million alveoli in two lungs is
(a) 63 to 27meters
(b) 36 to 72 meters
(c) 42 to 74 meters
(d) 27 to 47 meters
Answer : B
Question. Mussels respire through their
(a) skin
(b) gills
(c) lungs
(d) trachea
Answer : B
Question. The voice box is called
(a) epiglottis
(b) glottis
(c) larynx
(d) vocal cords
Answer : C
Question. Radiation
(a) does not require any medium
(b) is the process of transfer of heat in liquids
(c) is the process of transfer of heat in which heat traveles in one direction.
(d) Occurs in solids.
Answer : A
Question. A Thermos flask prevents loss or gain of heat by
(a) conductions only
(b) convections only
(c) radiation only
(d) all the above
Answer : D
Question. Handles of cooking utensils should be made of material that
(a) conducts heat well
(b) does not conduct heat
(c) radiate heat well
(d) does not radiate heat
Answer : B
Question. Sea breeze and land breeze
(a) are caused by currents set up in air due to conduction
(b) are caused by currents set up in air due to convection
(c) are caused by currents set up in air due to radiation
(d) have no relation to conduction, convection and radiation
Answer : B
Question. Which of the following is the best heat insulator
(a) air
(b) steel
(c) copper
(d) iron
Answer : A
Question. Heat from the sun reaches us by the process of
(a) conduction
(b) convection
(c) radiation
(d) all the above
Answer : C
Question. In liquids heat is transferred
(a) only by convection
(b) only by radiation
(c) mainly by conduction and convection
(d) none of these
Answer : A
Question. Stainless steel pans are provided with copper bottom because
(a) copper is easier to clean than stainless steel
(b) such pans are colourful
(c) copper bottom makes the pan more durable
(d) copper is better conductor of heat than stainless steel
Answer : D
Question. A polished silvery surface is
(a) good absorber of heat
(b) good reflector of heat
(c) poor reflector of heat
(d) None of these
Answer : B
Question. Land breeze blows in coastal regions during
(a) day
(b) summer
(c) winter
(d) night
Answer : D
Question. A wooden spoon is dipped in a cup of icecream. Its other end
(a) does not become cold
(b) becomes cold by the process of radiation
(c) becomes cold by the process of convection
(d) becomes cold by the process of conduction
Answer : A
Question. Dark coloured clothes are preferred during
a) summer
(b) sand storm
(c) winter
(d) none of these
Answer : C
Question. A black body with rough surface is a
(a) good reflector and poor absorber of heat
(b) good absorber and good radiator of heat
(c) good absorber and poor radiator of heat
(d) good reflector and poor radiator of heat
Answer : B
Question. Range of laboratory thermometer is generally from
(a) -10° F to 110° F
(b) 10° C to 110° C
(c) 10° C to -110° C
(d) -10° C to 110° C
Answer : D
Question. Normal temperature of human body is
(a) 37° F
(b) 37° C
(c) 39° C
(d) 39° F
Answer : B
Question. Which of the following is a good conductor of heat
(a) Wool
(b) Water
(c) Wood
(d) Silver
Answer : D
Question. Device used for measuring temperature
(a) Barometer
(b) Odometer
(c) Thermometer
(d) Speedometer
Answer : C
Question. Transmission of heat energy with actual movement of particles
(a) Conduction
(b) Convection
(c) Radiation
(d) None of these.
Answer : B
Question. When two bodies are kept in contact heat flows from
(a) a body at higher temperature to the body at lower temperature
(b) a body at lower temperature to the body at higher temperature
(c)no flow of heat
(d) all of the above
Answer : A
Question. A cold steel spoon dipped in a cup of hot milk. It transfers heat to the other end by the process of
(a) radiation
(b) convection
(c) conduction
(d) none of these
Answer : A
Question. The word acid comes from the Latin word ‘ acere ‘ which means
(a) Sweet
(b) Salty
(c) Neutral
(d) Sour
Answer : D
Question. Substances which are bitter in taste, feel soapy on touching are known as
(a) Acids
(b) Bases
(c) Indicators
(d) Neutral solution
Answer : B
Question. Special type of substances used to test whether a substance is acidic/basic are known as
(a) Indicators
(b) Acids
(c) Bases
(d) Salt
Answer : A
Question. Some naturally occurring indicators are
(a) Turmeric
(b) Litmus
(c) China rose
(d) All the above
Answer : D
Question.The most commonly used natural indicator’ Litmus’ is extracted from
(a) Lichens
(b) Turmeric
(c) Indicators
(d) China rose
Answer : A
Question. Litmus is available in the form of
(a) Litmus paper
(b) Lichens
(c) Indicator
(d) China rose
Answer : A
Question. Neutral solutions which do not change the colour of either red/blue litmus are known as
(a) Neutral solutions
(b) Acid solutions
(c) Basic solutions
(d) Neither acidic nor basic
Answer : A
Question. Acetic acid is found in
(a) Curd
(b) Spinach
(c) Citrus fruits
(d) Vinegar
Answer : D
Question. Formic acid is found in
(a) Curd
(b) Spinach
(c) Ant’s sting
(d) Ascorbic acid
Answer : C
Question. Citric acid is found in
(a) Curd
(b) Citrus fruits
(c) Ascorbic acid
(d) Lime water
Answer : B
Question. Lactic acid is found in
(a) Curd
(b) Citrus fruits
(c) Gooseberry
(d) Lime
Answer : A
Question. Oxalic acid is found in
(a) Spinach
(b) Curd
(c) Oranges
(d) Unripe mangoes
Answer : A
Question. Ascorbic acid is found in
(a) Amla & Citrus fruits
(b) Curd
(c) Oranges & lemon
(d) Unripe mangoes
Answer : A
Question. Tartaric acid is found in
(a) Tamarind
(b) Grapes
(c) unripe mangoes
(d) All of the above
Answer : D
Question. Calcium hydroxide is found in
(a) Calcium carbonate
(b) Calcium chloride
(c) Calcium
(d) Lime water
Answer : D
Question. Ammonium hydroxide is found
(a) Window cleaner
(b) Detergents
(c) Soap
(d) Milk of magnesia
Answer : A
Question. Sodium hydroxide is found in
(a) Soap
(b) Window cleaner
(c) Calcium hydroxide
(d) Sodium
Answer : A
Question. Potassium hydroxide is found in
(a) Soap
(b) Window cleaner
(c) Potassium
(d) Potassium chlorate
Answer : A
Question. Magnesium hydroxide is found in
(a) Milk of magnesia
(b) Magnesium chloride
(c) Magnesium ribbon
(d) Magnesium hydroxide
Answer : A
Question. Who is the 18 year old Harijan youth in Mulk Raj Anand’s ‘Untouchable’
(a) Arnold
(b) Bakha
(c) Swami
Answer : B
Question. Name the hero of John Bunyan’s ‘Pilgrims Progress’
(a) God
(b) Satan
(c) Christian
Answer : C
Question. Identify the young boy who became well known because of an old lamp he held?
(a) Pinocchio
(b) Hansel
(c) Aladdin
Answer : C
Question. Name the wooden boy whose nose grew when he lied?
(a) Pinocchio
(b) Hansel
(c) Aladdin
Answer : A
Question. Find out the character who was a giant in one city and a dwarf in another?
(a) Frankenstein
(b) Gulliver
(c) Sherlock Holmes
Answer : B
Question. Identify the writer who created the famous character Mowgli?
(a) Rudyard Kipling
(b) Robert Grave
(c) R. L. Stevenson
Answer : A