Moderate

Q. Write the name of monomer of a polymer which is used to prepare non-stick utensils.

A. Tetra fluoro ethylene Explanation: Polytetrafluoroethylene (PTFE or Teflon) is used for non-stick...

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Moderate

Q. Write down the IUPAC name of the following organic compound

A. 2-Bromopropane or (1) CH₃–CH₂–CH₂–OH → Propane-1-ol(2) CH₃–CH(OH)–CH₃ → Propane-2-ol

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Easy

Q. Identify the triple bond unsaturated hydrocarbon: (a) CH₄ (b) C₂H₆ (c) C₂H₄ (d) C₂H₂

A. (d) C₂H₂ Explanation: A triple bond unsaturated hydrocarbon belongs to the alkyne...

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Moderate

Q. How can the given conversion be carried out?

A. The given conversion of ethene (H₂C = CH₂) to ethane (H₃C –...

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Easy

1

Q. Write the names of two bio-degradable polymers.

A. Examples of biodegradable polymers : Polylactic acid (PLA) Polyhydroxybutyrate (PHB)

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Moderate

Q. State the resistance of 220 V – 100 W bulb

A. Power (P) = Resistance (R) = = = = 484 Ω

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Moderate

Q. For which value of the angle of incidence in refraction of light is Snell’s law...

A. Snell’s law is not applicable when the angle of incidence is 0°.

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Moderate

Q. Write whether the following statement is true or false: If coefficient of linear expansion of...

A. True Explanation: Coefficient of cubical expansion γ = 3 × coefficient of...

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Moderate

Q. What is the number of molecules present in 16 g of O₂ at S.T.P.?

A. 3.011 × 10²³ Explanation: Given mass = 16 g Molecular mass =...

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Moderate

Q. Write whether the following statement is true or false: According to Charles’ law, at (–)...

A. False Explanation: Charles' law states volume becomes zero at absolute zero (-273°C),...

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Moderate

Q. Name the metal which is extracted in thermite process.

A. Fe Explanation: Thermite process reduces metal oxides using Al at high temperature...

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Moderate

Q. Fill up the blank: CaC₂ + N₂ → ____ + C

A. CaNCN / CaCN₂ (Calcium cyanamide) Explanation: Haber's process uses Fe as catalyst...

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