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1. Class 10 Science MCQ Questions
1. The ph value of a solution is 7.9. It states that the solution is:
( a ) acidic
( b ) basic
( c ) neutral
( d ) nothing can be said
2. NaOH is known as:
( a ) bleaching soda
( b ) washing soda
( c ) caustic soda
( d ) baking Soda
3. What is the formula of Plaster of Paris:
( a ) CaSo4.1/2H2O
( b ) CaSo4.2H2O
( c ) 2CaSO4.5H2O
( d ) CaSo4.5H2O
4. Which acid is present in vinegar?
( a ) Citric acid
( b ) Malic Acid
( c ) Acetic acid
( d ) Folic acid
5. Descending order of elements according to reactivity series:
( a ) K>Mg>Fe>Cu
( b ) K>Mg>Cu>Fe
( c ) Fe>Cu>K>Mg
( d ) Mg>K>Cu>Fe
6. What is the product formed when magnesium oxide reacts with nitric acid?
( a ) Magnesium oxide
( b ) Magnesium nitrate
( c ) Magnesium nitride
( d ) Magnesium hydroxide
7. Freshly prepared aqua regia is:
( a ) white
( b ) blue
( c ) yellow
( d ) colorless
8. A cell in the human body has:
( a ) 23 pairs of chromosomes
( b ) 24 pairs of chromosomes
( c ) 45 total chromosomes
( d ) 44 total chromosomes
9. Mendel conducted his famous breeding experiment on:
( a ) aloe vera
( b ) mushrooms
( c ) pea plants
( d ) palm plants
10. Most of the refraction of light in the human eye occurs:
( a ) at lens
( b ) at iris
( c ) at the outer surface of the cornea
( d ) at retina
Answers –
1. ( b ) basic
2. ( c ) caustic soda
3. ( a ) CaSo4.1/2H2O
4. ( c ) Acetic acid
5. ( a ) K>Mg>Fe>Cu
6. ( b ) magnesium nitrate
7. ( d ) colorless
8. ( a ) 23 pairs of chromosomes
9. ( c ) pea plants
10. ( c ) at the outer surface of the cornea
2. Class 10 Science MCQ Questions
1. MnO2+4HCl—>MnCl2+H2O+Cl2
( a ) MnO2 is oxidized.
( b ) MnO2 is reduced
( c ) HCl is reduced
( d ) MnO2 and HCl both reduced
2. Choose the organism the sex of which is not genetically determined.
( a ) Goat
( b ) Lion
( c ) Human
( d ) Turtle
3. Which is false about light refraction?
( a ) The incident ray, the normal, and the refracted ray all lie in a different plane.
( b ) n=sini/cosr
( c ) n=sini/sinr
( d ) a & b both
4. Calculate the amount of charge passed through any area of the cross-section of the conductor having a current of 30 A for 5 minutes.
( a ) 7000 C
( b ) 8000 C
( c ) 9000 C
( d ) 6000 C
5. Where does the process of digestion begin?
( a ) in the stomach
( b ) in the mouth
( c ) in the liver
( d ) none of the above
6. A student takes an element A and allows its reaction with O2. The resulting compound is soluble in water and has a high melting point. Element A is:
( a ) At
( b ) S
( c ) Ca
( d ) Zn
7. Identify the exothermic reaction from the reactions given below.
( a ) CH4+O2—>CO2+H2O+Heat
( b ) N2(g)+O2(g)—>2NO
( c ) C(s)+H2O(l)—>CO+H2
( d ) b & c both
8. Convex lenses are used to correct:
( a ) Amblyopia
( b ) Dyspraxia
( c ) Myopia
( d ) Hypermetropia
9. If three resistors of 2 ohms, 4 ohms, and 5 ohms are connected in parallel, what will be the equivalent resistance?
( a ) 1.5 ohm
( b ) 1.05 ohm
( c ) 1.7 ohm
( d ) 1.09 ohm
10. Which of the following statements about magnetic field lines is incorrect?
( a ) They propagate from the South pole to the North pole inside the magnet.
( b ) They intersect each other at every point.
( c ) They are curled and closed lines
( d ) They propagate from the North pole to the South pole outside the magnet.
Answers –
1. ( b ) MnO2 is reduced
2. ( d ) Turtle
3. ( d ) a & b both
4. ( c ) 9000 C
5. ( b ) in the mouth
6. ( c ) Ca
7. ( a ) CH4+O2—>CO2+H2O+Heat
8. ( d ) Hypermetropia
9. ( b ) 1.05 ohm
10. ( b ) They intersect each other at every point.
3. Class 10 Science MCQ Questions
1. Which part of the brain maintains the balance of the body?
( a ) Hindbrain
( b ) Cranium
( c ) Cerebellum
( d ) Forebrain
2. If a ray of light travels from a rarer medium to a denser medium, it:
( a ) bends towards the normal
( b ) bends away from the normal
( c ) goes straight
( d ) none of the above
3. Trypsin produced by:
( a ) stomach
( b ) liver
( c ) gastric gland
( d ) pancreas
4. What is the descending order of the atomic radii of the elements:
( a ) Al>Ga>In
( b ) In>Al>Ga
( c ) Ga>Al>In
( d ) In>Ga>Al
5. In a concave mirror, when an object is placed between C and F, the image is formed:
( a ) at infinity
( b ) at F
( c ) beyond C
( d ) At the pole
6. A chemical bond between two atoms sharing two electrons each:
( a ) double bond
( b ) single bond
( c ) triple bond
( d ) no bond
7. If an object moves with a speed of 10m/s in front of a plane mirror, at what speed will its image move?
( a ) 25cm/sec
( b ) 10m/sec
( c ) 20m/s
( d ) 20cm/s
8. The skull consists of:
( a ) 22 bones
( b ) 29 bones
( c ) 8 bones
( d ) 14 bones
9. The growing movements made through plants in response to contact with a solid object are called:
( a ) Chemotropism
( b ) Geotropism
( c ) Hydrotropism
( d ) Thigmotropism
10. When a white light ray enters a prism, the color which shows the minimum deviation:
( a ) Violet
( b ) Red
( c ) Yellow
( d ) Blue
Answers –
1. ( c ) Cerebellum
2. ( a ) bends towards the normal
3. ( d ) pancreas
4. ( b ) In>Al>Ga
5. ( c ) beyond C
6. ( a ) double bond
7. ( c ) 20m/s
8. ( a ) 22 bones
9. ( d ) Thigmotropism
10. ( b ) Red
4. Class 10 Science MCQ Questions
1. Human urine consists of:
( a ) NH4Cl
( b ) NH2-CO-NH2
( c ) NH2-NH2
( d ) NO2
2. The blood pressure in a healthy human body is:
( a ) 80 mm Hg
( b ) 70 mm Hg
( c ) 60 mm Hg
( d ) 110 mm Hg
3. Bronze is a mixer of:
( a ) Fe+Zn
( b ) Fe+Sn
( c ) Cu+Zn
( d ) Cu+Sn
4. If different currents are flowing in two nichrome wires ( A & B ) of the same voltages in such a way that the current in wire A is higher than the current in wire B, what will be the order of resistance in them?
( a ) R2>R1
( b ) R1>R2
( c ) R1=R2
( d ) nothing can be said
5. If a metal is treated with a non-metal, will the resultant dissolve in an organic solvent or not?
( a ) A little soluble
( b ) Yes
( c ) No
( d ) nothing can be said
6. Match the following:
| Column 1 | Column 2 | ||
| A | Calcium carbonate | i | CaSO4.2H2O |
| B | Washing soda | ii | NaHCO3 |
| C | Gypsum | iii | CaCO3 |
| D | Baking soda | iv | Na2CO3.10H2O |
( a ) A – i, B – ii, C – iv, D – iii
( b ) A – iii, B – ii, C – iv, D – i
( c ) A – ii, B – iv, C – i, D – iii
( d ) A – iii, B – iv, C – i, D – ii
7. Teeth should be brushed after eating sweets with:
( a ) a neutral toothpaste
( b ) an acidic toothpaste
( c ) a basic toothpaste
( d ) a sour toothpaste
8. If an atom of an element has configuration 2,8,4, the element will belong to:
( a ) 13th group
( b ) 14th group
( c ) 11th group
( d ) 16th group
9. A zygote containing the X-chromosome inherited from the father develops into:
( a ) either a boy or girl
( b ) girl
( c ) boy
( d ) can’t assume
10. Electrical resistivity of a metallic wire depends on
( a ) its area
( b ) its length
( c ) its thickness
( d ) its nature
Answers –
1. ( b ) NH2-CO-NH2
2. ( a ) 80 mm Hg
3. ( d ) Cu+Sn
4. ( a ) R2>R1
5. ( c ) No
6. ( d ) A – iii, B – iv, C – i, D – ii
7. ( c ) a basic toothpaste
8. ( b ) 14th group
9. ( b ) girl
10. ( d ) its nature
5. Class 10 Science MCQ Questions
1. What is the correct sequence of components in a reflex arc?
( a ) Receptors–Spinal cord–Sensory neuron–Motor neuron–Muscle
( b ) Receptors–Sensory neuron–Spinal cord–Muscle–Motor neuron
( c ) Spinal cord–Motor neuron–Sensory neuron–Receptors—Muscle
( d ) Receptors–Sensory neuron–Spinal cord–Motor neuron–Muscle
2. Which is a good conductor of heat and electricity?
( a ) Gold
( b ) charcoal
( c ) graphite
( d ) Brass
3. Detergents are used for washing clothes in:
( a ) soft water
( b ) both soft and hard water
( c ) hard water
( d ) none of the above
4. In a convex mirror, the image is always formed:
( a ) inverted, real, diminished
( b ) erect, virtual, and magnified
( c ) inverted, real, magnified
( d ) erect, virtual, and diminished
5. Why does the sky appear blue?
( a ) due to the scattering of light
( b ) due to dispersion
( c ) due to refraction
( d ) due to reflection
6. Acid rain is the mixture of:
( a ) H2SO4 and HNO2
( b ) HNO3 and H2SO3
( c ) HNO3 and H2SO4
( d ) H2SO4 and KNO3
7. Which of the following characteristics is not caused by heredity?
( a ) Skin color
( b ) Body size
( c ) Eye color
( d ) Height of people
8. If a plotting compass is placed near the south pole, in which direction will its pointer point?
( a ) point towards the south pole
( b ) point away the south pole
( c ) point towards the north pole
( d ) point towards the north direction
9. Biogas is a mixture of:
( a ) methane and propane
( b ) methane and carbon dioxide
( c ) propane and ethane
( d ) carbon dioxide and ethylene
10. What do farmers add to the soil, which neutralizes the acidity of the soil?
( a ) Ca(OH)2
( b ) CaO
( c ) NaOH
( d ) Water
Answers –
1. ( d ) Receptors–Sensory neuron–Spinal cord–Motor neuron–Muscle
2. ( c ) graphite
3. ( b ) both soft and hard water
4. ( d ) erect, virtual, and diminished
5. ( a ) due to scattering of light
6. ( c ) HNO3 and H2SO4
7. ( b ) Body size
8. ( a ) point towards the south pole
9. ( b ) methane and carbon dioxide
10. ( a ) Ca(OH)2
Final words
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