TS EAMCET 2019 :: Chemistry :: General questions

• Chemistry - General questions

Find the suitable method from the following to prepare primary amines without the loss of carbons

Answer:

Explanation:

Gabriel method is a suitable method for the preparation of primary amines without the loss of carbons. This reaction is used for the preparation of $1^{0}$  aliphatic amine and $1^{0}$ aromatic amine (containing electron-withdrawing group at o-and p-position e.g,$NO_{2}$ group)

Phthalimide on treatment with ethanolic KOH forms potassium salt of phthalimide which on heating with RX followed by either alkaline hydrolysis or hydrazinolysis with hydrazine ($H_{2}N. NH_{2})$  produces the corresponding $1^{0}$ amine.

The compound that does not undergo haloform reaction is 

Answer:

Explanation:

 The Haloform reaction is given by aldehydes and ketones containing three $\alpha$-H  atoms and alcohols containing 

 group

 In other words all the methyl ketones

 and only acetaldehyde (ethanal)

($CH_{3}CHO)$ can give this test

$CH_{3}CH_{2}OH$      $ \underrightarrow{NaOH+I_{2}}$     $CH_{}I_{3}+HCOO^{-}$

$C_{2}H_{5}COCH_{2}CH_{3}$      $ \underrightarrow{NaOH+I_{2}}$   does not give Haloform test.

The enzyme responsible for the conversion of proteins  to $\alpha-$ amino acids is 

Answer:

Explanation:

Trypsin is responsible for breakdown of proteins into amino acid. It is a human  pancreatic enzyme that breakdown  proteins into amino acids along with several other enzymes like, carboxypeptidase and dipeptidase

The IUPAC  name of the compound $(NH_{4})_{2}[Ni(C_{2}O_{4})_{2}(H_{2}O)_{2}]$ is

Answer:

Explanation:

The IUPAC name of the compound $(NH_{4})_{2}[Ni(C_{2}O_{4})_{2}(H_{2}O)_{2}]$ is is Ammonium diaquabis(oxalato)nickelate(II)

Name the gaseous products from the following A and B  reactions respectively.

A. Hydrochloric acid is added to sodium sulphide

B.Conc. sulphuric acid is added to a mixture of sodium chloride and manganese dioxide

The correct answer is 

Answer:

Explanation:

(A) .  when hydrochloric acid reacts with sodium sulphide, hydrogen sulphide gas and sodium chloride are produced.

    $2HCl(aq)+Na_{2}S(aq)$ $\rightarrow H_{2}S(g)+2Nacl$

 (B)  Maganese  oxide react with conc. sulphuric acid and sodium chlorode to produce maganese sulphate, chlorine , sodium sulphate and water

$MnO_{2}+2NaCl+2H_{2}SO_{4}\rightarrow MnSO_{4}+Cl_{2}(g)+Na_{2}SO_{4}+2H_{2}O$

 hence, option (d)  is the correct answer

• Chemistry - General questions