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p-Block Elements – II Chemistry - p-Block Elements – II

Tamil Nadu Board - STD 12 - Chemistry (Tamil - English Medium). 324 questions in this chapter.

Question types

p-Block Elements – II question types

324 questions across 8 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.

324
Questions
8
Question groups
5
Question types
Sample Questions

p-Block Elements – II questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 11Assertion And Reason.1 Mark
Assertion (A) – Xenon is used in high speed electronic flash bulbs used by photographers.
Reason (R) – Xenon emits an intense light in discharge tubes instantly.
  • ✓
    A and R are correct and R explains A
  • B
    A and R are correct but doesn’t explains A
  • C
    A is correct but R is wrong
  • D
    A is wrong but R is correct

Answer: A.

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Q 12Assertion And Reason.1 Mark
Assertion (A) – Noble gases have the largest ionisation energy compared to any other elements.
Reason (R) – Noble gases have incomplete filled orbital.
  • A
    A and R are correct and R explains A
  • B
    A and R are correct but doesn’t explains A
  • ✓
    A is correct but R is wrong
  • D
    A is wrong but R is correct

Answer: C.

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Q 13Assertion And Reason.1 Mark
Assertion (A) - Hydrogen iodide decomposes at $400^{\circ} C$ while hydrogen fluoride and hydrogen chloride are stable at this temperature.
Reason (R) – Thermal stability of hydrogen halides decreases from fluoride to iodide.
  • ✓
    A and R are correct and R explains A
  • B
    A and R are correct but doesn’t explains A
  • C
    A is correct but R is wrong
  • D
    A is wrong but R is correct

Answer: A.

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Q 14Assertion And Reason.1 Mark
Assertion (A) – The bleaching of chlorine is temporary.
Reason (R) – Chlorine oxidises ferrous salts to ferric salts.
  • A
    A and R are correct and R explains A
  • B
    A and R are correct but doesn’t explains A
  • C
    A is correct but R is wrong
  • ✓
    A is wrong but R is correct

Answer: D.

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Q 15Assertion And Reason.1 Mark
Assertion (A) – Sulphuric acid is highly reactive.
Reason (R) – Sulphuric acid can act as strong acid and an oxidising agent.
  • A
    A and R are correct and R explains A
  • ✓
    A and R are correct but doesn’t explains A
  • C
    A is correct but R is wrong
  • D
    A is wrong but R is correct

Answer: B.

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Q 29Match The Following.4 Marks
(i) White phosphorous – (a) Volcanic eruptions
(ii) Red phosphorous – (b) Yellow phosphorous
(iii) Phosphine – (c) Match boxes
(iv) $SO_2$ – (d) smoke screen
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Q 37[ 5 Marks Questions ]5 Marks
Give reasons for each of the following :
  1. Bleaching of flowers by $Cl_2$ is permanent while by $SO_2$ is temporary.
  2. Molten aluminium bromide is a poor conductor of electricity.
  3. Nitric oxide becomes brown when released in air.
  4. $PCl_5$ is ionic in nature in the solid-state.
  5. Ammonia is a good complexing agent.
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Q 38[ 5 Marks Questions ]5 Marks
Cone. $H_2SO_4$ is added followed by heating to each of the following test tubes labelled (I) to (IV). Identify in which of the above test tube the following change will be observed. Support your answer with the help of a chemical equation:
(a) formation of black substance
(b) evolution of brown gas
(c) evolution of colourless gas
(d) formation of a brown substance which on dilution becomes blue.
(e) the disappearance of yellow powder along with evolution of colourless gas.
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