Chemistry | Mechanical Engineering | TANCET Anna University Online Objective Test

TANCET Anna University Mechanical Engineering # Chemistry Coordination Compounds Prepare / Learn

Q1. Tetraaminecopper(II) ion is a square planar complex with one unpaired electron. According to valence bond theory the hybrid state of copper should be

s p^{3}

s p^{3}

d s p^{2}

d^{2} s p^{3}

Answer : Option C
Explaination / Solution:

Tetraaminecopper(II) ion is square planar so hybridization is

d s p^{2}

TANCET Anna University Mechanical Engineering # Chemistry Chemistry in Everyday Life Prepare / Learn

Q2. Artificial sweetening agents are given to diabetics because

A. They do not get metabolized and hence don’t add calories

B. They get easily metabolized in the body

C. They add calories but do not get metabolized in the body

D. They add flavor to sweets

Answer : Option A
Explaination / Solution:

Artificial sweetening agents are metabolized and hence don’t add calories.

TANCET Anna University Mechanical Engineering # Chemistry Aldehydes Ketones and Carboxylic Acids Prepare / Learn

Q3. The product formed in Aldol condensation is

A. an alpha, beta unsaturated ester

B. an alpha – hydroxy aldehyde or ketone.

C. a beta – hydroxy aldehyde or a beta – hydroxy ketone.

D. a beta – hydroxy acid

Answer : Option C
Explaination / Solution:

In aldol we get beta hydroxyl aldehyde/Ketone.

TANCET Anna University Mechanical Engineering # Chemistry Electrochemistry Prepare / Learn

Q4. Saturated solution of

K N O_{3}

is used to make 'salt bridge' because

A. Saturated solution of

K N O_{3}

is used to make 'salt bridge' because

B. velocity of

K^{+}

is greater than that of

N O^{3 -}

C. velocity of both K⁺ and NO^3- are nearly th same

K N O_{3}

is highly soluble in water

Answer : Option C
Explaination / Solution:

Saturated solution of

K N O_{3}

is used in salt bridge because of same mobility o f

K^{+}

and

N O^{3 -}

TANCET Anna University Mechanical Engineering # Chemistry Thermodynamics Prepare / Learn

Q5. The volume of gas is reduced to half from its original volume. The specific heat will be

A. be doubled

B. reduce to half

C. remain constant

D. increase four times

Answer : Option C
Explaination / Solution:

Specific heat will remain constant.

TANCET Anna University Mechanical Engineering # Chemistry Chemical Bonding and Molecular Structure Prepare / Learn

Q6. In

{PO}_{4}^{3 -}

ion the formal charge on the oxygen atom of P–O bond is

A. + 0.75

B. – 0.75

C. + 1

D. – 1

Answer : Option D
Explaination / Solution:

Formal charge on the oxygen atom of P–O bond is – 1

TANCET Anna University Mechanical Engineering # Chemistry Haloalkanes and Haloarenes Prepare / Learn

Q7. Decomposition of benzene diozonium chloride by using Cu2Cl2/HCl to form chlorobenzene is

A. Friedel – Crafts reaction

B. Finkelstein reaction

C. Sandmeyer's reaction

D. Wurtz – Fittig reaction

Answer : Option C
Explaination / Solution:

TANCET Anna University Mechanical Engineering # Chemistry The s-Block Elements Prepare / Learn

Q8. The reducing power of a metal depends on various factors. Suggest the factor which makes Li, the strongest reducing agent in aqueous solution.

A. Electron-gain enthalpy

B. Hydration enthalpy

C. Sublimation enthalpy

D. Ionisation enthalpy

Answer : Option A
Explaination / Solution:

High hydration energy of Li makes it’s a very good reducing agent. Its hydration energy compensates the high ionization energy.

TANCET Anna University Mechanical Engineering # Chemistry Organic Chemistry Some Basic Principles and Techniques Prepare / Learn

Q9. Which of the following compounds contain all the carbon atoms in the same hybridisation state?

A. H−−−C ≡ C−−−C ≡ C−−−H