Question
Prove that with a rectangular glass slab, incident ray and emergent ray are parallel to each other.
Prove that with a rectangular glass slab, incident ray and emergent ray are parallel to each other.
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Question
Find the length of an iron rod at 110°C if at 10°C, the length of the rod is 20 cm. [Volume expansion coefficient of iron = 36 × 10⁻⁶ /°C]
Find the length of an iron rod at 110°C if at 10°C, the length of the rod is 20 cm. [Volume expansion…
Question
Why are there gaps at regular intervals between consecutive rails in a railway track? State the relation between linear expansion coefficient (α), superficial expansion coefficient (β) and volume expansion coefficient (γ). [2+1]
Why are there gaps at regular intervals between consecutive rails in a railway track? State the relation between linear expansion coefficient (α),…
Question
How many grams of CaCO₃ will react with excess of dilute HCl to produce 66 g of CO₂?
How many grams of CaCO₃ will react with excess of dilute HCl to produce 66 g of CO₂? [Ca = 40, C…
Question
In a closed vessel, 1 g of magnesium is burnt with 0.5 g of oxygen gas. Which reactant remains in excess? Find the quantity of excess reactant. [Mg = 24, O = 16]
In a closed vessel, 1 g of magnesium is burnt with 0.5 g of oxygen gas. Which reactant remains in excess? Find…
Question
State Avogadro’s law. Use simple calculation to show that moist air is lighter than dry air. [1+2]
State Avogadro’s law. Use simple calculation to show that moist air is lighter than dry air. [1+2]
Question
Write the structural formulae of 1,2-dibromoethane and 1,1,2,2-tetrabromoethane. Write the name of the organic compound which is produced when ethyl alcohol is heated with concentrated sulphuric acid. [2+1]
Write the structural formulae of 1,2-dibromoethane and 1,1,2,2-tetrabromoethane. Write the name of the organic compound which is produced when ethyl alcohol is…
Question
Mention one use of CNG. Discuss one each of the harmful effects of methanol and ethanol. [1+2]
Mention one use of CNG. Discuss one each of the harmful effects of methanol and ethanol. [1+2]
Question
Write with balanced chemical equation, what happens when hydrogen sulphide is passed through aqueous solution of lead nitrate.
Write with balanced chemical equation, what happens when hydrogen sulphide is passed through aqueous solution of lead nitrate.
Question
What materials are used as cathode, anode and electrolyte during electroplating of a brass spoon with nickel?
What materials are used as cathode, anode and electrolyte during electroplating of a brass spoon with nickel?