List of top Science Questions

ii) Write IUPAC names for the following compounds:
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i) Write balanced equations for the following reactions:
(a) Aluminum + Copper chloride → Aluminum chloride + Copper:
(b) Magnesium + Hydrochloric acid → Magnesium chloride + Hydrogen:
(ii) Why fuse is used in domestic electrical circuits?
(i) Explain Corrosion. Write its two examples.
(iii) A refrigerator of 200 W is operated for 10 hours per day. Find out the cost of energy to operate it for 30 days at the rate of ₹6 per kWh.
(iii) State the law to find the direction of magnetic field produced due to straight current carrying wire.
(i) Draw magnetic lines of force due to a current carrying solenoid.
(ii) What do you understand by the heating effect of electric current? In a heater of resistance \(10 \, \Omega\), a current of \(15 \, \text{A}\) is flowing for 30 minutes. What will be the amount of heat produced in the heater?
(ii) Show ray diagram for the refraction of a light ray through a prism and point out the emergent angle and angle of deviation.
(i) State Ohm's law. What will be the value of current and potential difference at the ends of each resistance in the given circuit?
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(ii) What is the meaning of magnification produced by a lens? An object of length 5 cm is at a distance of 15 cm from a convex lens. Focal length of the lens is 10 cm. What will be the size of the image?
(i) Mention any two properties of magnetic field lines.
(ii) Mention two factors which affect the magnetic field produced by a straight current carrying conductor.
(i) Clarify the meaning of power of accommodation of eye lens of human eye. Where is the image formed by the eye lens?
(i) Show the image formation by a convex mirror by ray diagram when the object is at infinity and
(a) at infinity
(b) in between pole of the mirror and infinity
Physical factor of ecosystem is:
Which of the following is top carnivore?
Which of the following is an animal hormone?
The technique of producing many plants from a single plant under infection-free condition is called—
Chlorophyll is important
Unsaturated hydrocarbon from the following is:
The bond in diatomic molecule of Nitrogen is:
Formula for Baking Soda is:
Dialysis is related to:
Homologous series among the following is: