Match List-I with List-IIList I (Compound) Cellulose nitrate Pota

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 Multiple Choice QuestionsMultiple Choice Questions

181.

Biogas consists of mainly

  • Methane

  • Ethane

  • Butane

  • Carbon dioxide


182.

A gas is evolved when a piece of zinc metal is placed in dilute sulphuric acid (H2SO4). What is the gas?

  • Hydrogen

  • Oxygen

  • Water vapour

  • Sulphur dioxide


183.

Turmeric (Haldi) rapidly becomes colourless on addition of

  • Baking soda

  • Vinegar

  • Lemon juice

  • Alcohol


184.

Metalloids are

  • alloys of alkali metals with other metals

  • colloids of metals

  • elements having some properties of both metals and non-metals

  • metals heavier than lead


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185.

Two reactants in a flask produce bubbles of gas; it turns lime water into milky. The reactants in the flask are

  • Zinc and hydrochloric acid

  • Magnesium carbonate and hydrochloric acid

  • Magnesium nitrate and hydrochloric acid

  • Magnesium sulphate and hydrochloric acid


186.

Which one among the foliowing transitions is associated with the largest change in energy in hydrogen atom?

  • n= 5 to n= 3

  • n= 2 to n= 1

  • n= 3 to n= 2

  • n= 4 to n= 2


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187.

Match List-I with List-II

List I (Compound)

  1. Cellulose nitrate
  2. Potassium sulphate
  3. Potassium salt of fatty acids
  4. Calcium oxide

List II (Use)

  1. Soft soap
  2. Gun powder
  3. Fertilizer
  4. Glass

  • (a) - 2, (b) - 3, (c) - 1, (d) - 4

  • (a) - 2, (b) - 1, (c) - 3, (d) - 4

  • (a) - 4,(b) - 1, (c) - 3, (d) - 2

  • (a) - 4, (b) - 3, (c) - 1, (d) - 2


A.

(a) - 2, (b) - 3, (c) - 1, (d) - 4


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188.

Which one among the following equations is correctly balanced?

  • NaOH + AI + H2O → 2H2 + NaAIO2

  • 2NaOH + 2AI + 2H2O → 3H2 + 2NaAIO2

  • 2NaOH + 2AI + 3H2O → 4H2 + 2NaAIO2

  • 2NaOH + 2AI + H2O → H2 + 2NaAIO2


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189.

Three elements Na, S and O combine to form a compound Na2SO3. What is the valency of S in this compound?

  • 2+

  • 4+

  • 6+

  • 8+


190.

Which one among the following is the equivalent weight of sulphuric acid? (Atomic weight: H =1,S = 32, O = 16)

  • 98

  • 60

  • 100

  • 49


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