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Mixed Chemistry

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Which of the following does not react with CuSO4 solution?

  1. Ag

  2. Fe

  3. Mg

  4. Zn

  5. None of these


Correct Option: A
Explanation:

This option is correct because these are dependent on the reactivity rules. Hence, more reactive metal displaces the less reactive metal, according to reactivity series silver cannot displace copper therefore it does not react with copper.

Which of the following is an example of thermosetting polymers?

  1. Neoprene

  2. PVC

  3. Nylon 6,6

  4. Bakelite

  5. None of these


Correct Option: D
Explanation:

This option is correct because the phenol and formaldehyde undergoes reaction and futher linking to produce backlite (thermosetting polmers).

Which of the following is also known as Vitamin K?

  1. Axerophytol

  2. Calciferol

  3. Tocopherol

  4. Antihaemorrahagic

  5. None of these


Correct Option: D
Explanation:

This option is correct because vitamin K is obtained from green leaves of  cauliflower, cabbage, etc. Its main function is helping in blood coagulation and its deficiency delays the coagulation period. Vitamin K is, hence also known as antihaemorrahagic.

In Clemmensen's reduction, acetone gives:

  1. propane

  2. propene

  3. propanol

  4. propyne

  5. none of these


Correct Option: A
Explanation:

This option is correct, as the Clemmensen's reduction involves the reduction of aldehyde and ketone in presence of  zinc amalgam, and HCl. It produces alkanes. Acetone is reduced in to propane.

The addition of arsenic chloride in acetylene produces a poisonous gas, called ___________.

  1. lewisite

  2. Chloropicrine

  3. Mustard gas

  4. Acetylene gas

  5. None of these


Correct Option: A
Explanation:

This option is correct, as arsenic chloride is added in acetylene in presence of AlCl3, Cu2Cl2 to form 2-chlorovinyldichloroarsine. This is Lewisite. it is very powerful poisonous gas.

The Hofmann and Hinsberg's reagent is used in _____________.

  1. Separation of amine

  2. Producing alkyl isocynanide

  3. Formation of Schiff's base

  4. Option 2 and 3 correct

  5. None of these


Correct Option: A
Explanation:

This option is correct because the Hofmann and Hinsberg's reagent is used in the separation of amine from the mixture of primary, secondary and tertiary amine.

The reaction of the element Cu with hot and concentrated nitric acid produces which of the following gases?

  1. N2O

  2. NO

  3. NO2

  4. N2

  5. None of these


Correct Option: D
Explanation:

This option is correct because hot and concentrated nitric acid reacts with Cu, and produces N2 gas.

Nylon-6, 6 can be prepared from which of the following?

  1. Benzyl chloride

  2. Benzaldehydes

  3. Succinic acid

  4. Adipic acid

  5. None of these


Correct Option: D
Explanation:

This option is correct because hexamethylene diamine and adipic acid condenses to remove water and makes a large unit of compound called nylon-6, 6.

Which of the following statements is true about the Finkelstein reaction?

  1. Alkyl iodide is prepared with alkyl chloride in presence of KI solution.

  2. Alkane are prepared by alkyl halides of two molecules with metal sodium.

  3. The iodine forms the ester with silver salts.

  4. Alkyl halides are formed by the decomposition of silver salts of fatty acid with chlorine.

  5. None of these


Correct Option: A
Explanation:

This option is correct because the Alkyl iodide is prepared by the treatment of primary alkyl halides with alkali metal halides leads to the replacement of halogen to formed the alkyl iodide.

Which reaction is used for the preparation of acetophenone?

  1. Reimer- Tiemann reaction

  2. Wurtz-Fitting

  3. Friedal-Craft's reaction

  4. Option 1 and 2

  5. None of these


Correct Option: C
Explanation:

This option is correct because bezene is treated with acetyl chloride, in presence of anhydrous aluminium chloride to form acetophenone.

Which of the following compounds shows the aromatic properties?

  1. Valine

  2. Leucine

  3. Serine

  4. Tryosine

  5. None of these


Correct Option: D
Explanation:

This option is correct because the tryosine can represent the aromatic properties. It is a alpha-amino beta(p-hydroxyphenyl) propionoic acid. It has aromatic nucleus. It is aromatic amino acid.

The PCl3 and cold water reacts to produce which of the following?

  1. H3PO3

  2. H3PO2

  3. H4P2O7

  4. H3PO4

  5. None of these


Correct Option: A
Explanation:

This option is correct because phosphorous chloride reacts with water and produces orthophosphoric acid. It is called phosphorous acid.

The ethylamine on heating with chloroform and KOH produces bad smelling compound. Which of the following is that compound?

  1. CH3CH2CN

  2. CH3CH2NC

  3. CH3NCO

  4. CH3CNO

  5. None of these


Correct Option: B
Explanation:

This option is correct because primary amine on treatment with chloroform and KOH produces ethyl carbylamine.

White phosphorus contains:

  1. P4

  2. P6

  3. P8

  4. P2

  5. None of these


Correct Option: A
Explanation:

This option is wrong because white phosphorus shines in darkness due to its slow combustion in the air. It is produced by phosphorus pentaoxide.

The test which identifies acetaldehydes and acetone is _____________.

  1. the Molisch test

  2. the Iodoform test

  3. the Bromoform test

  4. the Schiff's test

  5. none of these


Correct Option: D
Explanation:

This option is correct because the acetaldehyde gives a pink colour with Schiff's reagent while acetone does not respond to this test.

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