47 + Mcqs in Engineering Sciences Page 1 McqOptions

1.	The conductivity of micelles is
A.	Higher than a colloidal solution
B.	Lower than a colloidal solution
C.	Equals to colloidal solution
D.	None of the mentioned
Answer» B. Lower than a colloidal solution

Discussion

2.	Micelles behave as colloids only whena
A.	Concentration is less than CMC
B.	Concentration is equal to CMC
C.	Concentration is greater than CMC
D.	They always behave as colloids
Answer» D. They always behave as colloids

Discussion

3.	What is Critical Micelle Concentration?
A.	The maximum amount of concentration that is required for the formation of micelle
B.	The minimum amount of concentration that is required for the formation of micelle
C.	The maximum amount of concentration that is not required for the formation of micelle
D.	The minimum amount of concentration that is not required for the formation of micelle
Answer» C. The maximum amount of concentration that is not required for the formation of micelle

Discussion

4.	The transition of ions to micelle is
A.	Reversible
B.	Irreversible
C.	All of the mentioned
D.	None of the mentioned
Answer» B. Irreversible

Discussion

5.	Select the correct statement from the following options
A.	The soap micelle is unstable due to positive charge on its head
B.	The soap micelle is unstable due to positive charge on its head
C.	The soap micelle is unstable due to negative charge on its head
D.	The soap micelle is stable due to negative charge on its head
Answer» E.

Discussion

6.	Select the incorrect statement from the following options.
A.	In the micelle formation, the water soluble heads are directed towards the centre
B.	In the micelle formation, the water soluble heads are on the surface in contact with the water
C.	In the micelle formation, the water insoluble tails are directed towards the centre
D.	None of the mentioned
Answer» B. In the micelle formation, the water soluble heads are on the surface in contact with the water

Discussion

7.	The number of stearate ions required to form a micelle of colloidal size is
A.	50
B.	60
C.	70
D.	80
Answer» D. 80

Discussion

8.	Which of the following is water insoluble?
A.	COO–
B.	Na+
C.	C17H35
D.	All of the mentioned
Answer» C. C17H35

Discussion

9.	Which part of the stearate ion is hydrophilic in nature?
A.	Tail
B.	Hydrocarbon chain
C.	Head
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

10.	What is the molecular formula of stearate ion?
A.	C17H35COO–
B.	C35H17COO+
C.	C35H17COO–
D.	C17H35COO+
Answer» B. C35H17COO+

Discussion

11.	At what temperature does the water molecules contract?
A.	At 00C
B.	Below 00C
C.	At 40C
D.	Between 00C and 40C
Answer» E.

Discussion

12.	Which of the following possess lowest energy?
A.	NO
B.	O2
C.	N2
D.	CO
Answer» D. CO

Discussion

13.	O-nitrophenol is more volatile than p-nitrophenol due to
A.	Inductive effect
B.	Electromeric effect
C.	Inter-molecular hydrogen bonding in O-nitrophenol
D.	Intra-molecular hydrogen bonding in O-nitrophenol
Answer» E.

Discussion

14.	Which of the following is the consequence of hydrogen bonding?
A.	Abnormal boiling point
B.	Solubility and Viscosity
C.	Azeotropic behavior
D.	All of the mentioned
Answer» E.

Discussion

15.	Which of the following is not a necessary condition for the formation of intra-molecular hydrogen bonding?
A.	A 5 or 6-membered ring should be formed
B.	The ring should be planar
C.	There should be minimum strain during the ring closure
D.	There should be maximum strain during the ring closure
Answer» E.

Discussion

16.	Hydrogen bonding is maximum in
A.	Diethyl ether
B.	Ethyl chloride
C.	Ethanol
D.	Triethylamine
Answer» D. Triethylamine

Discussion

17.	Arrange the following molecules in the order of increasing boiling point.
A.	I2 < Br2 < Cl2 < F2
B.	F2 < Cl2 < Br2 < I2
C.	F2 < Br2 < Cl2 < I2
D.	Cl2 < F2 < I2 < Br2
Answer» C. F2 < Br2 < Cl2 < I2

Discussion

18.	The strength of Vander Waals forces depends upon
A.	Size of the molecule
B.	Molecular structure
C.	Number of electrons present in the molecule
D.	All of the mentioned
Answer» E.

Discussion

19.	Which of the following has the highest bond dissociation energy?
A.	Covalent bond
B.	Vander Waals forces
C.	Dipole-dipole
D.	Hydrogen bond
Answer» B. Vander Waals forces

Discussion

20.	Which of the following is a microscopic property?
A.	Reactivity
B.	Inter-molecular force
C.	Boiling point
D.	Kinetic energy
Answer» C. Boiling point

Discussion

21.	The amplification factor for transistor when used as an amplifier will be
A.	25
B.	50
C.	75
D.	100
Answer» C. 75

Discussion

22.	Which of the following is not an application of a transistor?
A.	Tunnel diodes
B.	Thermistors
C.	Amplifiers
D.	None of the mentioned
Answer» E.

Discussion

23.	The correct sequence for the procedure adopted for making a pure elemental semiconductor consist of
A.	Preparation of ultrapure Si or Ge>> Doping>> Preparation of single crystals of S
B.	Doping>> Preparation of ultrapure Si or Ge>> Preparation of single crystals of S
C.	Preparation of ultrapure Si or Ge>> Preparation of single crystals of Si or Ge>> Doping
D.	Preparation of single crystals of Si or Ge>> Preparation of ultrapure Si or Ge>>
Answer» D. Preparation of single crystals of Si or Ge>> Preparation of ultrapure Si or Ge>>

Discussion

24.	Optical fibre can be safely used for signal transmission near the nuclear installati
A.	There is no leakage of signals
B.	Plastic cladded silica fibres are resistant to nuclear radiations
C.	Plastic cladded silica fibres are not resistant to nuclear radiations
D.	There is no electromagnetic interference
Answer» C. Plastic cladded silica fibres are not resistant to nuclear radiations

Discussion

25.	What is the principle on which an optical fibre works?
A.	Total internal reflection
B.	Farraday’s law of induction
C.	Doppler Effect
D.	Hooke’s law
Answer» B. Farraday’s law of induction

Discussion

26.	The dielectric material that shows spontaneous and reversible dielectric polarisa
A.	Piezoelectrics
B.	Pyroelectrics
C.	Ferroelectrics
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

27.	Identify the class of the superconductor to which TiO and NbO belong.
A.	Simple compounds
B.	Nonstoichiometric crystals having defects
C.	Charge-transfer compounds
D.	Molecular crystals
Answer» C. Charge-transfer compounds

Discussion

28.	The critical temperature for the cuprate La2CuO4 is
A.	40 K
B.	90 K
C.	125 K
D.	35 K
Answer» E.

Discussion

29.	The materials which offer no resistance to the passage of electricity are
A.	Superconductors
B.	Semiconductors
C.	Optical fibre
D.	Smart material
Answer» B. Semiconductors

Discussion

30.	Which compound imparts grey color, strength and hardness to the portland cement?
A.	Iron oxide
B.	Alumina
C.	Magnesium oxide
D.	Silica
Answer» B. Alumina

Discussion

31.	Which compound causes the cement efflorescent, if present in excess?
A.	Iron oxide
B.	Alkali oxide
C.	Sulphur trioxide
D.	Lime
Answer» C. Sulphur trioxide

Discussion

32.	The percentage composition of alumina in Portland cement is
A.	60-69
B.	17-25
C.	3-8
D.	2-4
Answer» D. 2-4

Discussion

33.	All portland cements are hydraulic cement because of they
A.	Set and harden in the absence of water
B.	Set and harden in the presence of water
C.	Do not harden after mixing water
D.	None of the mentioned option
Answer» C. Do not harden after mixing water

Discussion

34.	Who is recognized as the “Father of the modern Portland cement industry”?
A.	Emil Abderhalden
B.	Richard Abegg
C.	Peter Agre
D.	William Aspdin
Answer» E.

Discussion

35.	Why Gypsum is added after calcination in the manufacture of Portland cement?
A.	To prevent flash setting
B.	To improve the quality of cement
C.	To increase the lime saturation factor
D.	None of the mentioned
Answer» B. To improve the quality of cement

Discussion

36.	Portland cement is made by calcining at temperature equals to
A.	30000C
B.	15000C
C.	18000C
D.	20000C
Answer» C. 18000C

Discussion

37.	Blast furnace slag is the mixture of
A.	Slaked lime and calcium silicate
B.	Aluminium silicate and hydrated lime
C.	Calcium silicate and aluminium silicate
D.	Silica, alumina and calcium oxide
Answer» D. Silica, alumina and calcium oxide

Discussion

38.	Select the incorrect statement from the following options.
A.	Puzzolona is the oldest cement invented by Romans
B.	Natural puzzolona is deposit of volcanic ash
C.	Puzzolona was used in making concrete for construction of walls and domes
D.	Puzzolona is quite setting cement and posses relatively low strength
Answer» E.

Discussion

39.	Which type of cement possesses hydraulic qualities?
A.	Natural
B.	Puzzolona
C.	Slag
D.	Portland
Answer» B. Puzzolona

Discussion

40.	Which of the following is not an application of nanomaterials?
A.	TV and computer monitors
B.	Cardiology
C.	Magnetic Resonance Imaging (MRI)
D.	Sunscreens and fuel cells
Answer» C. Magnetic Resonance Imaging (MRI)

Discussion

41.	Which one of the following is non-linear material?
A.	Zirconium oxide
B.	Magnetite
C.	Maghemite
D.	Lithium niobate
Answer» E.

Discussion

42.	Which type of material expands and contract in response to an applied electric field?
A.	Advanced material
B.	Smart material
C.	Biomaterial
D.	Nanomaterial
Answer» C. Biomaterial

Discussion

43.	Polymers are used in the chemical industry because of their
A.	Inert nature
B.	Light weight
C.	Low cost
D.	Easiness in fabricability
Answer» B. Light weight

Discussion

44.	Which one of the following is the best heat and corrosion resistant material?
A.	Metals
B.	Ceramics
C.	Polymers
D.	Semi-conductors
Answer» C. Polymers

Discussion

45.	Select the incorrect statement from the following option.
A.	Metals are extremely good conductors of heat and electricity
B.	The properties of metal degrade rapidly with temperature
C.	Metals have poor corrosion resistant
D.	A polished metal surface has a dull appearance
Answer» E.

Discussion

46.	Which of the following is not an aerospace material?
A.	Plastics
B.	Silica
C.	Aluminium alloys
D.	Polymers
Answer» E.

Discussion

47.	Based on the important category, concrete and fibre glass are the examples of
A.	Ceramics
B.	Polymers
C.	Composites
D.	Semi-conductors
Answer» D. Semi-conductors

Discussion

Explore topic-wise MCQs in Graduate Aptitude Test (GATE).

&nbsp;The&nbsp;conductivity&nbsp;of&nbsp;micelles&nbsp;is

Micelles&nbsp;behave&nbsp;as&nbsp;colloids&nbsp;only&nbsp;whena

What&nbsp;is&nbsp;Critical&nbsp;Micelle&nbsp;Concentration?

The&nbsp;transition&nbsp;of&nbsp;ions&nbsp;to&nbsp;micelle&nbsp;is

&nbsp;Select&nbsp;the&nbsp;correct&nbsp;statement&nbsp;from&nbsp;the&nbsp;following&nbsp;options

&nbsp;Select&nbsp;the&nbsp;incorrect&nbsp;statement&nbsp;from&nbsp;the&nbsp;following&nbsp;options.

The&nbsp;number&nbsp;of&nbsp;stearate&nbsp;ions&nbsp;required&nbsp;to&nbsp;form&nbsp;a&nbsp;micelle&nbsp;of&nbsp;colloidal&nbsp;size&nbsp;is

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;water&nbsp;insoluble?

Which&nbsp;part&nbsp;of&nbsp;the&nbsp;stearate&nbsp;ion&nbsp;is&nbsp;hydrophilic&nbsp;in&nbsp;nature?

What&nbsp;is&nbsp;the&nbsp;molecular&nbsp;formula&nbsp;of&nbsp;stearate&nbsp;ion?

At&nbsp;what&nbsp;temperature&nbsp;does&nbsp;the&nbsp;water&nbsp;molecules&nbsp;contract?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;possess&nbsp;lowest&nbsp;energy?

O-nitrophenol&nbsp;is&nbsp;more&nbsp;volatile&nbsp;than&nbsp;p-nitrophenol&nbsp;due&nbsp;to

&nbsp;Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;the&nbsp;consequence&nbsp;of&nbsp;hydrogen&nbsp;bonding?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;not&nbsp;a&nbsp;necessary&nbsp;condition&nbsp;for&nbsp;the&nbsp;formation&nbsp;of&nbsp;intra-molecular&nbsp;hydrogen&nbsp;bonding?

Hydrogen&nbsp;bonding&nbsp;is&nbsp;maximum&nbsp;in

Arrange&nbsp;the&nbsp;following&nbsp;molecules&nbsp;in&nbsp;the&nbsp;order&nbsp;of&nbsp;increasing&nbsp;boiling&nbsp;point.

The&nbsp;strength&nbsp;of&nbsp;Vander&nbsp;Waals&nbsp;forces&nbsp;depends&nbsp;upon

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;has&nbsp;the&nbsp;highest&nbsp;bond&nbsp;dissociation&nbsp;energy?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;a&nbsp;microscopic&nbsp;property?

The&nbsp;amplification&nbsp;factor&nbsp;for&nbsp;transistor&nbsp;when&nbsp;used&nbsp;as&nbsp;an&nbsp;amplifier&nbsp;will&nbsp;be

&nbsp;Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;not&nbsp;an&nbsp;application&nbsp;of&nbsp;a&nbsp;transistor?

The&nbsp;correct&nbsp;sequence&nbsp;for&nbsp;the&nbsp;procedure&nbsp;adopted&nbsp;for&nbsp;making&nbsp;a&nbsp;pure&nbsp;elemental&nbsp;semiconductor&nbsp;consist&nbsp;of

Optical&nbsp;fibre&nbsp;can&nbsp;be&nbsp;safely&nbsp;used&nbsp;for&nbsp;signal&nbsp;transmission&nbsp;near&nbsp;the&nbsp;nuclear&nbsp;installati

What&nbsp;is&nbsp;the&nbsp;principle&nbsp;on&nbsp;which&nbsp;an&nbsp;optical&nbsp;fibre&nbsp;works?

The&nbsp;dielectric&nbsp;material&nbsp;that&nbsp;shows&nbsp;spontaneous&nbsp;and&nbsp;reversible&nbsp;dielectric&nbsp;polarisa

Identify&nbsp;the&nbsp;class&nbsp;of&nbsp;the&nbsp;superconductor&nbsp;to&nbsp;which&nbsp;TiO&nbsp;and&nbsp;NbO&nbsp;belong.

&nbsp;The&nbsp;critical&nbsp;temperature&nbsp;for&nbsp;the&nbsp;cuprate&nbsp;La2CuO4&nbsp;is

The&nbsp;materials&nbsp;which&nbsp;offer&nbsp;no&nbsp;resistance&nbsp;to&nbsp;the&nbsp;passage&nbsp;of&nbsp;electricity&nbsp;are

Which&nbsp;compound&nbsp;imparts&nbsp;grey&nbsp;color,&nbsp;strength&nbsp;and&nbsp;hardness&nbsp;to&nbsp;the&nbsp;portland&nbsp;cement?

Which&nbsp;compound&nbsp;causes&nbsp;the&nbsp;cement&nbsp;efflorescent,&nbsp;if&nbsp;present&nbsp;in&nbsp;excess?

The&nbsp;percentage&nbsp;composition&nbsp;of&nbsp;alumina&nbsp;in&nbsp;Portland&nbsp;cement&nbsp;is

All&nbsp;portland&nbsp;cements&nbsp;are&nbsp;hydraulic&nbsp;cement&nbsp;because&nbsp;of&nbsp;they

Who&nbsp;is&nbsp;recognized&nbsp;as&nbsp;the&nbsp;&ldquo;Father&nbsp;of&nbsp;the&nbsp;modern&nbsp;Portland&nbsp;cement&nbsp;industry&rdquo;?

Why&nbsp;Gypsum&nbsp;is&nbsp;added&nbsp;after&nbsp;calcination&nbsp;in&nbsp;the&nbsp;manufacture&nbsp;of&nbsp;Portland&nbsp;cement?

Portland&nbsp;cement&nbsp;is&nbsp;made&nbsp;by&nbsp;calcining&nbsp;at&nbsp;temperature&nbsp;equals&nbsp;to

Blast&nbsp;furnace&nbsp;slag&nbsp;is&nbsp;the&nbsp;mixture&nbsp;of

Select&nbsp;the&nbsp;incorrect&nbsp;statement&nbsp;from&nbsp;the&nbsp;following&nbsp;options.

Which&nbsp;type&nbsp;of&nbsp;cement&nbsp;possesses&nbsp;hydraulic&nbsp;qualities?

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;not&nbsp;an&nbsp;application&nbsp;of&nbsp;nanomaterials?

&nbsp;Which&nbsp;one&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;non-linear&nbsp;material?

Which&nbsp;type&nbsp;of&nbsp;material&nbsp;expands&nbsp;and&nbsp;contract&nbsp;in&nbsp;response&nbsp;to&nbsp;an&nbsp;applied&nbsp;electric&nbsp;field?

Polymers&nbsp;are&nbsp;used&nbsp;in&nbsp;the&nbsp;chemical&nbsp;industry&nbsp;because&nbsp;of&nbsp;their

Which&nbsp;one&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;the&nbsp;best&nbsp;heat&nbsp;and&nbsp;corrosion&nbsp;resistant&nbsp;material?

Select&nbsp;the&nbsp;incorrect&nbsp;statement&nbsp;from&nbsp;the&nbsp;following&nbsp;option.

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;not&nbsp;an&nbsp;aerospace&nbsp;material?

Based&nbsp;on&nbsp;the&nbsp;important&nbsp;category,&nbsp;concrete&nbsp;and&nbsp;fibre&nbsp;glass&nbsp;are&nbsp;the&nbsp;examples&nbsp;of

The conductivity of micelles is

Micelles behave as colloids only whena

What is Critical Micelle Concentration?

The transition of ions to micelle is

Select the correct statement from the following options

Select the incorrect statement from the following options.

The number of stearate ions required to form a micelle of colloidal size is

Which of the following is water insoluble?

Which part of the stearate ion is hydrophilic in nature?

What is the molecular formula of stearate ion?

At what temperature does the water molecules contract?

Which of the following possess lowest energy?

O-nitrophenol is more volatile than p-nitrophenol due to

Which of the following is the consequence of hydrogen bonding?

Which of the following is not a necessary condition for the formation of intra-molecular hydrogen bonding?

Hydrogen bonding is maximum in

Arrange the following molecules in the order of increasing boiling point.

The strength of Vander Waals forces depends upon

Which of the following has the highest bond dissociation energy?

Which of the following is a microscopic property?

The amplification factor for transistor when used as an amplifier will be

Which of the following is not an application of a transistor?

The correct sequence for the procedure adopted for making a pure elemental semiconductor consist of

Optical fibre can be safely used for signal transmission near the nuclear installati

What is the principle on which an optical fibre works?

The dielectric material that shows spontaneous and reversible dielectric polarisa

Identify the class of the superconductor to which TiO and NbO belong.

The critical temperature for the cuprate La2CuO4 is

The materials which offer no resistance to the passage of electricity are

Which compound imparts grey color, strength and hardness to the portland cement?

Which compound causes the cement efflorescent, if present in excess?

The percentage composition of alumina in Portland cement is

All portland cements are hydraulic cement because of they

Who is recognized as the “Father of the modern Portland cement industry”?

Why Gypsum is added after calcination in the manufacture of Portland cement?

Portland cement is made by calcining at temperature equals to

Blast furnace slag is the mixture of

Select the incorrect statement from the following options.

Which type of cement possesses hydraulic qualities?

Which of the following is not an application of nanomaterials?

Which one of the following is non-linear material?

Which type of material expands and contract in response to an applied electric field?

Polymers are used in the chemical industry because of their

Which one of the following is the best heat and corrosion resistant material?

Select the incorrect statement from the following option.

Which of the following is not an aerospace material?

Based on the important category, concrete and fibre glass are the examples of