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9,374 Questions
CBSE
#1 Class 10 Chemistry Acids, Bases and Salts 2026 Mcq 1M
A metal carbonate reacts with a solution X which forms a salt, water and a gas Y. What are X and Y ?
A. X - Sodium hydroxide, Y - Carbon dioxide
B. X - Sodium hydroxide, Y - Hydrogen
C. X - Hydrochloric acid, Y - Carbon dioxide
D. X - Hydrochloric acid, Y - Hydrogen
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CBSE
#2 Class 10 Chemistry Chemical Reactions and Equations 2026 Mcq 1M
Which of the following are combination reactions ? (i) $2KClO_3 \rightarrow 2KCl + 3O_2$ (ii) $MgO + H_2O \rightarrow Mg(OH)_2$ (iii) $4Al + 3O_2 \rightarrow 2Al_2O_3$ (iv) $Zn + FeSO_4 \rightarrow ZnSO_4 + Fe$
A. (i) and (iii)
B. (iii) and (iv)
C. (ii) and (iv)
D. (ii) and (iii)
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CBSE
#3 Class 10 Chemistry Chemical Reactions and Equations 2026 Mcq 1M
Which of the following are decomposition reactions ? (i) $2KClO_3 \rightarrow 2KCl + 3O_2$ (ii) $MgO + H_2O \rightarrow Mg(OH)_2$ (iii) $2H_2O \rightarrow 2H_2 + O_2$ (iv) $Zn + CuSO_4 \rightarrow ZnSO_4 + Cu$
A. (i) and (ii)
B. (iii) and (iv)
C. (i) and (iii)
D. (ii) and (iv)
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CBSE
#4 Class 10 Chemistry Acids, Bases and Salts 2026 Mcq 1M
Rain water is called 'acid rain' when its :
A. pH falls below 7.2
B. pH falls below 14
C. pH is above 7
D. pH falls below 5.6
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CBSE
#5 Class 10 Chemistry Acids, Bases and Salts 2026 Mcq 1M
Baking powder is a mixture of :
A. Sodium carbonate + Acetic acid
B. Sodium carbonate + Tartaric acid
C. Sodium hydrogen carbonate + Tartaric acid
D. Sodium hydrogen carbonate + Acetic acid
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CBSE
#6 Class 10 Chemistry Acids, Bases and Salts 2026 Mcq 1M
The pH of the gastric juices released during digestion is :
A. Less than 7
B. More than 7
C. Equal to 7
D. Equal to 0
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CBSE
#7 Class 10 Chemistry Acids, Bases and Salts 2026 Mcq 1M
Which of the following compounds is used for removing permanent hardness of water ?
A. Bleaching powder
B. Washing soda
C. Baking soda
D. Caustic soda
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CBSE
#8 Class 10 Chemistry Acids, Bases and Salts 2026 Mcq 1M
Tamarind is a natural source of which acid ?
A. Acetic acid
B. Tartaric acid
C. Oxalic acid
D. Citric acid
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CBSE
#9 Class 10 Chemistry Acids, Bases and Salts 2026 Mcq 1M
Tomato is a natural source of which acid ?
A. Acetic acid
B. Tartaric acid
C. Oxalic acid
D. Citric acid
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CBSE
#10 Class 10 Physics Magnetic Effects of Electric Current 2026 Long 5M
(i) (I) In the given circuit diagram, a battery $B$, a key $K$, a resistance $R$ and a thick copper wire XY are connected in series and a compass is placed near the wire. What is the purpose of this arrangement ? (II)...
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CBSE
#11 Class 10 Physics Magnetic Effects of Electric Current 2026 Long 5M
(i) State the rules to determine the following : (I) Direction of magnetic field produced around a current-carrying straight conductor. (II) Direction of force experienced by a current-carrying straight conductor plac...
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CBSE
#12 Class 10 Physics Magnetic Effects of Electric Current 2026 Long 5M
(i) Draw the pattern of magnetic field lines through and around a current-carrying circular loop. (ii) State the rule to find out the direction of the magnetic field inside and around the circular loop. (iii) Give rea...
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CBSE
#13 Class 10 Physics Magnetic Effects of Electric Current 2026 Long 5M
(i) State the rule which gives the direction of force acting on a current-carrying conductor placed in a magnetic field. (ii) What is a fuse ? Why is it called a safety device ? (iii) Why are electrical appliances wit...
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CBSE
#14 Class 10 Physics Electricity 2026 Long 5M
(i) Draw a schematic diagram of a domestic electric circuit which includes the following devices : (I) A fuse (II) A power meter (III) One light point (IV) A power plug (ii) Why is it necessary to connect an earth wir...
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CBSE
#15 Class 10 Physics Magnetic Effects of Electric Current 2026 Long 5M
(i) The magnetic field lines due to two bar magnets X and Y are shown in the given diagram. If the magnet X is displaced towards magnet Y, will there be repulsion or attraction between them ? Justify. (ii) A metallic ...
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CBSE
#16 Class 10 Physics Electricity 2026 Long 4M
Read the following passage and answer the questions that follow : Swati, a class 10 student, observes that when she passes close to the refrigerator in her kitchen, she feels the heat, although the things kept inside ...
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CBSE
#17 Class 10 Physics Electricity 2026 Short 3M
The values of current $I$ flowing in a given resistor for the corresponding values of potential difference $V$ applied across the ends of the resistor are given below in the table : $I$ (Amperes) 0.4 0.8 1.2 1.6 2.0 $...
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CBSE
#18 Class 10 Physics Human Eye and Colourful World 2026 Short 3M
What is scattering of light ? How is scattering of light different from reflection of light ? Explain.
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CBSE
#19 Class 10 Physics Light - Reflection and Refraction 2026 Short 3M
In the given ray diagram a ray AO strikes a plane mirror at O making an angle of $40^\circ$ WITH THE MIRROR SURFACE and is reflected along OB. (a) State the laws which help to find out the angle of incidence and angle...
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CBSE
#20 Class 10 Physics Light - Reflection and Refraction 2026 Short 3M
(a) Write the expression for the magnification produced by a lens in terms of object distance and image distance. (b) A 4 cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 2...
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