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s-Block and p-Block Elements

Hydrogen, s-and p-Block Elements

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Identify the wrong statement.

  1. In group-15 of the periodic table, stability of hydrides increases from nitrogen hydride to bismuth hydride.
  2. d $\pi$ - p$\pi$ bond is not formed by nitrogen.
  3. Single P-P bond is stronger than single N-N bond.
  4. Two resonance structure is formed by N2O4.
  5. None of these
Question 2 Multiple Choice (Single Answer)

Which of the following information about sulphur is incorrect?

  1. Sulphur molecule is not diamagnetic.
  2. The vapour at 200oC consists mostly of S8 rings.
  3. At 600oC, the gas mainly consists of S2 molecules.
  4. The oxidation state of sulphur is never less than +4 in its compounds.
  5. None of these
Question 3 Multiple Choice (Single Answer)

Which of the following anions of boron is not possible?

  1. BF63-
  2. BH4-
  3. B(OH)4-
  4. BO2-
  5. None of these
Question 4 Multiple Choice (Single Answer)

Lithium nitrate on heating forms

  1. lithium nitrite and oxygen gas
  2. lithium oxide, nitrogen dioxide and oxygen gas
  3. lithium nitride and oxygen gas
  4. lithium oxide, hydroxide and oxygen gas
  5. none of these
Question 5 Multiple Choice (Single Answer)

When small amount of sodium oxide is dissolved in water, then

  1. oxidation number of sodium decreases
  2. oxide ion accepts sharing in a pair of electrons
  3. oxide ion donates a pair of electrons
  4. oxidation number of oxygen increases
  5. none of these
Question 6 Multiple Choice (Single Answer)

In which of the following is hard water produced?

  1. Saturation of water with calcium carbonate
  2. Saturation of water with magnesium carbonate
  3. Saturation of water with calcium sulphate
  4. Addition of sodium sulphate to water
  5. None of these
Question 7 Multiple Choice (Single Answer)

Which property differs Be and Al from each other?

  1. Exhibiting maximum covalency in compounds
  2. Forming polymeric hydrides
  3. Forming covalent hydrides
  4. Exhibiting amphoteric nature in their oxides
  5. None of these
Question 8 Multiple Choice (Single Answer)

Glass is categorised as

  1. a microcrystalline solid
  2. supercooled liquid
  3. gel
  4. polymeric mixture
  5. none of these
Question 9 Multiple Choice (Single Answer)

After reaction with potassium iodide and copper sulphate, sodium thiosulphate solution is added. Find the incorrect statement about this reaction.

  1. Cu2I2 is formed.
  2. CuI2 is formed.
  3. Na2S2O3 is oxidised.
  4. Evolved I2 is reduced.
  5. None of these
Question 10 Multiple Choice (Single Answer)

What is the reason for using alum for purifying the water?

  1. It forms complex with clay particles.
  2. It coagulates the mud particles.
  3. It exchanges Ca2+ and Mg2+ ions present in hard water.
  4. Its sulphate ion is a water purifier.
  5. None of these
Question 11 Multiple Choice (Single Answer)

Which of the following fertilisers is used to increase the acidity of soil?

  1. Potassium nitrate
  2. Urea
  3. Superphosphate of lime
  4. Ammonium sulphate
  5. None of these
Question 12 Multiple Choice (Single Answer)

Identify the amphoteric compound.

  1. SnO2
  2. SiO2
  3. CO2
  4. CaO
  5. None of these
Question 13 Multiple Choice (Single Answer)

Identify the correct statement.

  1. H3PO4 is a stronger acid than H2SO4.
  2. HF is a stronger acid than HCl in an aqueous medium.
  3. HClO4 is a weaker acid than HClO3.
  4. HNO3 is a stronger acid than HNO2.
  5. None of these
Question 14 Multiple Choice (Single Answer)

In hypophosphorous acid, number of hydrogen atom(s) attached to phosphorus atom after ionisation in water is

  1. 0
  2. 1
  3. 2
  4. 3
  5. None of these
Question 15 Multiple Choice (Single Answer)

When 1 mole of Mg3N2 is dissolved in water, it releases

  1. one mole ammonia
  2. one mole nitric acid
  3. two moles of ammonia
  4. two moles of nitric acid
  5. none of these
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