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Inorganic Chemistry - I

Description: Inorganic Chemistry - I
Number of Questions: 20
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Tags: Inorganic Chemistry - I Elements compounds & mixtures Chemical Compounds Preparation, Properties & Uses of Sulphur Dioxide Preparation, Properties & Uses of sulphide with special reference to contact process and haber-s process Preparation, Properties & Uses of Sulphuric Acid Chemistry Chemical Reactions
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SO2 (Sulphur dioxide) is

  1. a reducing agent

  2. an oxidising agent

  3. both reducing and oxidising agent

  4. neither an oxidising agent nor a reducing agent

Show answer
Correct Option: C
Explanation:

SO2 (sulphur dioxide) can act both as a reducing and an oxidising agent.

Which of the following gases has pungent suffocating odour?

  1. CO

  2. CO2

  3. O2 gas

  4. SO2

Show answer
Correct Option: D
Explanation:

Sulphur dioxide is a colourless gas with a pungent, suffocating odour. It is a dangerous air pollutant because it is corrosive to organic materials and it irritates the eyes, nose and lungs.

Which of the following is not a property of SO2?

  1. It decolourises bromine water.

  2. It turns acidified potassium dichromate solution green.

  3. It turns potassium permanganate solution pink.

  4. It bleaches the colour of a wet flower.

Show answer
Correct Option: C
Explanation:

SO2 turns potassium permanganate solution pink.

What is the effect of H2S on blood?

  1. It destroys the nucleus of the blood cells.

  2. It destroys the haemoglobin in the blood.

  3. It destroys the plasma membrane of the blood cells.

  4. It reacts with haemoglobin and forms sulphoxy haemoglobin.

Show answer
Correct Option: B
Explanation:

H2S destroys the haemoglobin in the blood.

Why does newspaper turn yellow on prolong exposure to atmosphere?

  1. Because the newspaper is bleached by SO2, which gets oxidized on prolonged exposure.

  2. Because the ink used to print newspaper reacts with water vapours and turns yellow.

  3. Because the newspaper undergoes reduction on exposure to atmosphere.

  4. Because the material with which newspaper is made reacts with atmospheric gases and turns yellow.

Show answer
Correct Option: A

Which of the following is a property of HCl gas?

  1. Lighter than air

  2. Soluble in water

  3. Poisonous

  4. Tasteless

Show answer
Correct Option: B
Explanation:

HCl is a covalent compound and it is a property of covalent compounds that they are soluble in water.

Which of the following is not a characteristic property of H2S?

  1. Rotten eggs smell

  2. Turns lead acetate paper black

  3. Strong oxidizing agent

  4. Decolourises acidified KMnO4 solution

Show answer
Correct Option: C
Explanation:

H2S acts as a strong oxidising agent.

Which of the following turns lime water milky?

  1. CO

  2. SO2

  3. O2

  4. Cl2

Show answer
Correct Option: B
Explanation:

SO2 turns lime water milky, so does carbon dioxide.

What is the chemical formula of Oleum?

  1. H2SO4

  2. H2S2O7

  3. Na2SO4.10H2O

  4. SO2Cl2

Show answer
Correct Option: B
Explanation:

H2S2O7 is the chemical formula of oleum.

Assertion (A): Drinking water is chlorinated. Reason (R): Chlorination makes water transparent, chemically rich and very nutritious.

  1. Both A and R are true, and R is the correct explanation of A.

  2. Both A and R are true but R is not a correct explanation of A.

  3. A is true but R is false.

  4. A is false but R is true.

Show answer
Correct Option: C
Explanation:

Chlorination is the process which is used to kill certain bacteria and other microbes in water as chlorine is highly toxic. Thus, the given assertion is true, but reason is not correct.

Heavy water is

  1. D2O

  2. H2O along with Ca, Mg, carbonate

  3. H2O2

  4. Sea water (H2O + Salt)

Show answer
Correct Option: A
Explanation:

D2O is known as heavy water.

At what temperature does the thermal decomposition of H2S complete?

  1. 310°C

  2. 770°C

  3. 1000°C

  4. 273°C

Show answer
Correct Option: B
Explanation:

At 770°C temperature, the thermal decomposition of H2S is completed.

Which of the following statements is incorrect about sulphuric acid?

  1. It reacts with Barium chloride and forms white precipitates.

  2. It releases SO2 on heating with copper.

  3. It forms H2 gas on heating with NaCl.

  4. It is used in the extraction of metals.

Show answer
Correct Option: C
Explanation:

Statement 3 is incorrect because hydrogen gas does not evolve on reaction with sulphuric acid. The following reaction takes place on reaction between them: NaCl (s) + H2SO4 (l) -------> HCl (g) + NaHSO4 (s)

Which of the following products is formed with glucose when added in H2SO4 solution?

  1. Black spongy mass of carbon rises up

  2. White precipitates settle down

  3. Reddish brown mass rises up

  4. Black precipitates settle down

Show answer
Correct Option: A
Explanation:

When glucose is added in H2SO4 solution, black spongy mass of carbon rises up.

Nitrogen was discovered by

  1. Scheele

  2. Lavoiser

  3. Daniel Rutherford

  4. Cavendish

Show answer
Correct Option: C
Explanation:

Nitrogen was discovered by Daniel Rutherford.

Which of the following is the boiling point of H2SO4?

  1. 338°C

  2. 770°C

  3. 473°C

  4. 127°C

Show answer
Correct Option: A
Explanation:

The boiling point of H2SO4 is 338°C.

Which of the following does not react with H2SO4 under any condition?

  1. Na

  2. Fe

  3. Cu

  4. Pt

Show answer
Correct Option: D
Explanation:

Platinum is the most unreactive metal.Thus, it does not react with H2SO4 under any condition.

Substances burn more rapidly in pure oxygen than in air because

  1. air contains helium

  2. air has a lower concentration of oxygen than pure oxygen

  3. air contains methane

  4. air contains ozone

Show answer
Correct Option: B
Explanation:

Substances burn more rapidly in pure oxygen than in air because air has a lower concentration of oxygen than pure oxygen.

Oxygen is prepared on a large-scale from

  1. potassium permanganate

  2. air

  3. water

  4. sodium peroxide

Show answer
Correct Option: B
Explanation:

Oxygen is prepared on a large-scale from air.

Which of the following gases is evolved when H2SO4 reacts with metal sulphide?

  1. SO2

  2. O2

  3. H2S

  4. SO3

Show answer
Correct Option: C
Explanation:

When H2SO4 reacts with metal sulphide, H2S gas evolves.

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