ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

In the chemical combination of hydrogen and fluorine to form HF:

• Sodium atom donates major share of its electrons. A
• Hydrogen atom donates the major share of its electrons. B
• Both the atoms share the electrons equally. C
• None of above. D

Group l-A elements react with water fastly than the reaction of group ll-A elements because

• l_Aelements are more soft then ll_A A
• l_Aelements are non-metals B
• l_Aelements have 1 electron in their outermost s-orbital and are strongly electropositive C
• l_Aelements make ionic bond D

Methyl alcohol is not used

• As a solvent A
• A an anti-freezing agent B
• As a substitute for petrol C
• For denaturing of ethyl alcohol D

The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called

• Functional isomers A
• Position isomers B
• Chain isomers C
• Metamers D

A process which takes place on its own without any outside assistance and moves from a non-equilibrium stat towards an equilibrium stat is termed as:

• Spontaneous process. A
• Natural process. B
• Non-Spontaneous process. C
• Both (a) and (b). D

Phosphorus helps the growth of

• Root A
• Leave B
• Stem C
• Seed D

Complete the reaction : KMnO₄+FeSO₄+H₂SO₄

• K₂SO₄+MnSO₄+Fe₂O+H₂O A
• K₂SO₄+MnSO₄+Fe₂(SO₄)+H₂ B
• K₂SO₄+MnSO₂+Fe(SO₄)+H₂O C
• K₂SO₄+MnSO₄+Fe₂(SO₄)+H₂O D

In which of the following reactions is the inorganic reagent acting as a nucleophile

• 
  A
• 
  B
• 
  C
• 
  D

When phenol is reduced in the presence of Zn dust, we get

• Cyclohexene A
• Cyclohexane B
• Benzene C
• Benzyne D

Four d-orbitals contain four lobes while fifth contains only two lobes the orbital is

• dxy A
• dxz B
• dz² C
• dx²- y² D

In Boyle's law which of the following pair is variable :

• Temperature and quantity of a gas. A
• Pressure and volume B
• Volume and quantity of a gas. C
• Pressure and quantity of a gas. D

A solution of sodium sulphate was electrolysed using some insert electrodes. The products at the electrodes are

• O₂, H₂ A
• O₂, Na B
• O₂, SO₂ C
• O₂, S₂O₈² D

Which of the following solution has the highest boiling point

• 5.85% solution of sodium chloride A
• 18.0% solution of glucose B
• 6.0% solution of urea C
• All have the same boiling point D

Which is litharge or massicot?

• PbO A
• Pb₂O B
• Pb₃O₄ C
• PbO₂ D

• -1.10 V A
• +1.10 V B
• -0.42 V C
• +0.42 V D

Tripple bond is present in

• O₂ A
• H₂ B
• N₂ C
• Cl₂ D

Splitting of spectral lines when atoms are subjected to strong electron field is called

• Zeeman effect A
• Stark effect B
• Photoelectric effect C
• Compton effect D

Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?

• Chlorination, nitration, reducing A
• Nitration, chlorination, reducition B
• Nitration, reduction,chlorination C
• Nitration, reduction, acylation, chlorination, hydrolysis D

Organic compounds resemble to those of inorganic compounds having same

• Ionic properties A
• Carbon forming long chain or rings B
• Chemical forces C
• Isomerism D

The covalent radius of Cl atom is:

• 99.4 pm. A
• 176.7 pm B
• 38 pm C
• 76 pm. D

Composition of clay in cement is

• 25% A
• 50% B
• 75% C
• 80% D

3.6% WN solution of HCI has the molairity

• 1.0 A
• 1.15 B
• 0.98 C
• 1.98 D

Molecule of halogens exist as

• Monatomic A
• Diatomic B
• Triatomi C
• Polyatomic D

Ultraviolet radiation from sun causes a reaction that produces

• Fluorides A
• Carbon monoxide B
• Sulphur dioxide C
• Ozone D

Given below are some statements concerning formic acid, which of them is true?

• It is a weaker acid than acetic acid A
• It is a reducing agent B
• When its calcium salt is heated, it forms a ketone C
• It is an oxidizing agent D

Which is not true about acetophenone?

• Reacts to form 2,4-dintrophenyl hydrazine A
• Reacts with Tollen's reagent to form silver mirror B
• Reacts with I₂/NaOH to form iodoform C
• On oxidation with alkaline KMnO₄followed by hydrolysis gives benzoic acid D

Ozonolysis of benzene gives

• nitration A
• sulphonation B
• ozonide C
• glyoxal D

0.1 molar glucose (C₆H₁₂O₆) solution has the % W/N

• 1.8% A
• 18% B
• 0.18% C
• 2.8% D

Al is the most element in earth crust:

• O A
• Si B
• Al C
• Pb D

Which of the following is a product of destructive distillation of coal

• Ammonia A
• Coke B
• Cyanides C
• Kerosene D