100525 + Interview Questions in GENERAL QA IN GENERAL AWARENESS

1.	Write the conditions to maximise the yield of `H_2SO_4` by contact process.
Answer» (a). Low temperature `(720K)` and high pressure (2 bar) (b). `2V_2O_5` as a catalyst.

Discussion

2.	Mention three areas in which `H_2SO_4` plays an important role.
Answer» Three areas in which `H_2SO_4` plays important role are: (a). As a laboratory reagent. (b). In metallurgical operations, e.g, cleaning metal before enameling. (c). In manufacture of pigments, paints and dyestuffs.

Discussion

3.	Which of the following is not counted as mold characteristics?(a) Possession of strength(b) Possession of refractoriness(c) Resist corrosion(d) Resist metal penetration in molds
Answer» Correct choice is (c) Resist corrosion Explanation: Resisting corrosion is not any of the characteristics of molds while remaining others are counted as mold characteristics.

Discussion

4.	How much percentage of water or moisture is contained by green sand cores?(a) 5%(b) 10%(c) 20%(d) 40%
Answer» Correct answer is (a) 5% The explanation: Green sand cores are made of green sand which mainly contains water or moisture nearly about 5% and 15 to 30 % of clay. It imparts very high permeability to the core material and hence reduces the chance of defects such as shrinkage or voids in the casted parts. Green sand cores are not dried but usually baked by dielectric bakers to maintain the moist content.

Discussion

5.	Weak cores are reinforced using what?(a) Iron wires(b) Steel wires(c) Bronze wires(d) Cobalt wires
Answer» Right answer is (b) Steel wires To explain I would say: Weak cores need to be strengthened. And hence, for this purpose, reinforcement is provided, in the form of steel wires.

Discussion

6.	Which of the following equipment is used for both limited and mass production?(a) Core ovens(b) Dielectric bakers(c) Radiant bakers(d) Flame bakers
Answer» Right answer is (a) Core ovens Explanation: Core ovens are the equipment which can be used for the making of limited productions. It is also a good choice if the production is going to be a mass one.

Discussion

7.	Cores are subjected to severe thermal and mechanical conditions.(a) Completely true(b) Partially true(c) Completely false(d) Partially false
Answer» The correct choice is (a) Completely true To explain I would say: Due to the direct pouring of molten metal (of elevated temperature) the cores are subjected to severe thermal and mechanical conditions and proper steps must be taken to avoid pattern or mold spoliation.

Discussion

8.	The following figure represents what?(a) Strickle core box(b) Gang core box(c) Left and right hand core boxes(d) Loose piece core box
Answer» Right choice is (c) Left and right hand core boxes For explanation: The following figure represents two core boxes, in which one is facing to the right, while the other is facing is towards the left. Hence, it depicts left and right hand core boxes.

Discussion

9.	The moisture of the core is taken off during baking at what temperature?(a) 197°F(b) 212°F(c) 278°F(d) 304°F
Answer» Right answer is (b) 212°F Explanation: None.

Discussion

10.	The following figure represents which type of chaplet?(a) Radiator chaplet(b) Stem chaplet(c) Cast chaplet(d) Sheet metal chaplet
Answer» Right choice is (a) Radiator chaplet Explanation: The following figure represents a radiator chaplet. This particular chaplet holds a very important duty, wherein it helps the cores by supporting them.

Discussion

11.	Which pattern operation is used for manufacturing wheel rims?(a) Follow board pattern(b) Segmental pattern(c) Sweep pattern(d) Gated pattern
Answer» Right choice is (b) Segmental pattern The best I can explain: In segmental pattern, it does not revolve continuously to make the mould, but completes one part of the mould and then goes to make the next portion. Hence, such type of pattern is used for making wheel rims and big gears.

Discussion

12.	Which of the following pattern operation is cheapest?(a) Sweep pattern(b) Gated pattern(c) Match plate pattern(d) Skeleton pattern
Answer» Right answer is (d) Skeleton pattern Best explanation: Skeleton pattern uses the least amount of material for the operations on pattern and therefore, it does not need a lot of investment on its materials, making it inexpensive.

Discussion

13.	Distinguish between the meaning of the terms adsorption and absorption. Give one example of each.
Answer» Adsorption is a surface phenomenon of accumulation of molecules of a substance at the surface rather than in the bulk of a solid or liquid. The substance that gets adsorbed is called the ‘adsorbate’ and the substance on whose surface the adsorption takes place is called the ‘adsorbent’. Here, the concentration of the adsorbate on the surface of the adsorbent increases. In adsorption, the substance gets concentrated at the surface only. It does not penetrate through the surface to the bulk of the solid or liquid. For example, when we dip a chalk stick into an ink solution, only its surface becomes coloured. If we break the chalk stick, it will be found to be white from inside. On the other hand, the process of absorption is a bulk phenomenon. In absorption, the substance gets uniformly distributed throughout the bulk of the solid or liquid.

Discussion

14.	Which of the following is shear thinning fluid?(a) Pseudoplastic(b) Dilatant(c) Rheopectic(d) Bingham plastic
Answer» Right option is (a) Pseudoplastic The explanation is: In rheology, shear thinning is the non-Newtonian behavior of fluids whose viscosity decreases under shear strain. It is sometimes considered synonymous for pseudoplastic behaviour, and is usually defined as excluding time-dependent effects, such as thixotropy. Shear-thinning behaviour is generally not seen in pure liquids with low molecular mass, or ideal solutions of small molecules like sucrose or sodium chloride, but is often seen in polymer solutions and molten polymers, and complex fluids and suspensions like ketchup, whipped cream, blood, paint, and nail polish.

Discussion

15.	“Thermal conversion of organic matter with an oxidant (normally oxygen) to produce primarily carbon dioxide and water”, which term is used for this process?(a) Oxidation(b) Pyrolysis(c) Combustion(d) Gasification
Answer» Correct answer is (c) Combustion Easy explanation: Combustion is defined as thermal conversion of organic matter with an oxidant (normally oxygen) to produce primarily carbon dioxide and water. The oxidant is in stoichiometric excess, i.e., complete oxidation.

Discussion

16.	If the equation of a velocity profile over a plate is v = 5y^2 + y (where v is the velocity in m/s) determine the shear stress at y = 0. Given the viscosity of the liquid is 8.35 poise.(a) 0.830(b) 0.832(c) 0.835(d) 0.834
Answer» The correct choice is (c) 0.835 The best explanation: Given Data: Velocity profile v = 5y^2 + y; μ = 8.35 poise Substituting y=0 on the above equation, we get shear stress at respective depths. τ = 0.835

Discussion

17.	KMnO4 does not act as oxidising agent in the presence of HCl. Why?
Answer» HCl cannot be used for making acidified KMnO₄ as oxidising agent, since it reacts with KMnO₄ as follows. 2MnO^-₄ + 10 Cl^- + 16H⁺ → 2Mn²⁺ + 5Cl₂ + 8H₂O

Discussion

18.	A reaction is first order in A and second order in B. (i) Write the differential rate equation. (ii) How is the rate affected on increasing the concentration of B three times? (iii) How is the rate affected when the concentrations of both A and B are doubled?
Answer» (i) \(\frac{dx}{dt}\) = k[A]¹[B]² (ii) If concentration of ‘B ’ is tripled, then the rate will become 9 times. (iii) When concentration of both A and B are doubled, then the rate will become 8 times

18.

A reaction is first order in A and second order in B. (i) Write the differential rate equation. (ii) How is the rate affected on increasing the concentration of B three times? (iii) How is the rate affected when the concentrations of both A and B are doubled?

Answer»

(i) \(\frac{dx}{dt}\) = k[A]¹[B]²

(ii) If concentration of ‘B ’ is tripled, then the rate will become 9 times.

(iii) When concentration of both A and B are doubled, then the rate will become 8 times

Discussion

19.	Give reason why a finely divided substance is more effective as an adsorbent.
Answer» Adsorption is a surface phenomenon. Therefore, adsorption is directly proportional to the surface area. A finely divided substance has a large surface area. Both physisorption and chemisorption increase with an increase in the surface area. Hence, a finely divided substance behaves as a good adsorbent.

Discussion

20.	Calculate the pH of 0.04 M HNO3 Solution.
Answer» Concentration of HNO₃ = 0.04M [H₃O⁺] = 0.04 mol dm^-3 pH = -log[H₃O⁺] = – log(0.04) = – log(4 x 10^-2) = 2 -log 4 = 2-0.6021 = 1.3979= 1.40

20.

Calculate the pH of 0.04 M HNO3 Solution.

Answer»

Concentration of HNO₃ = 0.04M

[H₃O⁺] = 0.04 mol dm^-3

pH = -log[H₃O⁺]

= – log(0.04)

= – log(4 x 10^-2)

= 2 -log 4 = 2-0.6021

= 1.3979= 1.40

Discussion

21.	At 293 K, vapour pressure of pure benzene is 75mm of Hg and that of pure toluene is 22 mm of Hg. The vapour pressure of the solution which contains 20 mol% benzene and 80 mol % toluene isA. 32.6 mm HgB. 64.4 mm HgC. 97 mm HgD. 3.26 mm Hg
Answer» Correct Answer - A `n_(Ben)=20%0.2` `n_(Tol)=80%=0.8` `P_(s)=X_(B)P_(B)^(@)+X_(T)P_(T)^(@)` `P_(s)=0.2xx75+0.8xx22` `=15.0+17.6` `32.6`

Discussion

22.	For infants, the pulse oximetry band is attached to their ______(a) arm(b) leg(c) palm(d) foot
Answer» Correct option is (d) foot The explanation is: The infant’s fingers and ears are too small and too delicate to attach the pulse oximeter band or the pulse oximeter clip. For infants, the blood vessels of the foot are more prominent and they give a better reception as compared to the rest of the body. Also, the infant may also move their arms/ legs so the band is attached to their foot. This way, the band won’t slip off, nor will it impede any tubes or even the diaper changing process.

Discussion

23.	What principle does pulse oximetry follow?(a) Law of Absorbance(b) Law of Reflection(c) Beer – Lambert Law(d) Law of Irradiance
Answer» Right choice is (c) Beer – Lambert Law To explain: Beer-Lambert relates the emerging light with the concentration of the solution and the thickness of vial/object containing the solution. When light is incident on the solution, some of the light is absorbed. This absorption depends on the concentration of the solution and the distance the light travels before it emerges. This light is measured on the outgoing end and it gives a measure of how much oxygen exists in the blood.

Discussion

24.	The change that occurs in the eye to see the distant objects clearly isa. focal length of the eye lens decreasesb. curvature of the eye lens decreasesc. focal length of the eye lens increasesd. ciliary muscles of the eye contract.
Answer» c). focal length of the eye lens increases

Discussion

25.	The dye is inserted into the body with the help of _________(a) stent(b) syringe(c) catheter(d) endoscope
Answer» The correct option is (c) catheter Explanation: Catheter is a hollow, flexible tube. It is used in minimal invasive surgery where a small slit is made and then the catheter is inserted. This catheter is flexible and can be controlled by the person performing the surgery. Since its hollow, micro instruments can be inserted in it and operations can be performed. Catheter is used to inject the dye in the desired place as the catheter is inserted in a convenient place and then positioned accordingly to inject the dye.

Discussion

26.	A typical ECG wave is _______(a) Periodic(b) A-periodic(c) Quasi – Periodic(d) Non – Periodic
Answer» Correct choice is (c) Quasi – Periodic Explanation: ECG wave comprises PQRSTU segments. In this, P, R, T, U are all waves that go above the baseline and Q, S are waves that go below. However, P wave and R wave are not periodic. Periodicity is checked between the successive R waves. Quasi periodic waves are those which are periodic in a certain interval. Since the ECG signal is periodic in R to R interval or P to P interval, its a Quasi periodic wave.

Discussion

27.	The resistance of a conductor is 27. If it is cut into three equal parts and connected in parallel, then its total resistance isa. 6 Ωb. 3 Ωc. 9 Ωd 27 Ω
Answer» The answer is b) 3 Ω

Discussion

28.	Bradycardia ECG will show what kind of wave?(a) The impulses have increased(b) The impulses have decreased(c) Pronounced P waves(d) Pronounced T waves
Answer» The correct answer is (b) The impulses have decreased The explanation: Bradycardia is a symptom where the heartbeat is below the normal range. The heart pumps blood slowly so the impulses are not so pronounced. In tachycardia, the impulses increase. The waves are shorter and sharper.

Discussion

29.	The most common placement of the leads from the Einthoven’s triangle is __________(a) Positive Left Arm and Negative Right Arm(b) Positive Left Leg and Negative Right Arm(c) Positive Left Leg and Negative Left Arm(d) Positive Right Arm and Negative Left Leg
Answer» The correct answer is (b) Positive Left Leg and Negative Right Arm Explanation: The Einthoven’s triangle forms a cyclic vector in form of direction. The most important readings are from the 2nd placement of leads in which the Left Leg is positive, the Right Arm is Negative and the Left Arm is neutral. The vector direction is from the right arm to the left leg.

Discussion

30.	In the differential auscultatory technique, where is the pressure sensor located?(a) In the middle of the cuff(b) In the upper portion of the cuff(c) In the lower portion of the cuff(d) Outside the cuff
Answer» The correct option is (c) In the lower portion of the cuff Easy explanation: In the differential auscultatory method of pressure sensing, two sensors together make the pressure sensor. One sensor is in contact with the skin while the other is in contact with the cuff. The pressure exerted by the skin due to the atrial blood flow is picked up by the sensor that is close to the skin while the pressure exerted by the cuff measured by the sensor that is close to the cuff. These sensors together give the blood pressure. Since the length of the cuff exerts pressure on the blood vessels, placing the sensor at the end of the length of the cuff ensures that the pressure is measured properly.

Discussion

31.	What is the normal range of blood pressure?(a) 70/40 – 90/60(b) 90/60 – 120/80(c) 120/80 – 140/90(d) 140/90 – 190/100
Answer» Right choice is (c) 120/80 – 140/90 Easiest explanation: The normal blood pressure in an adult human is found to be in the range of 120/80 – 140/90. BP above or below it leads to high blood pressure or low blood pressure. Blood pressure is represented by systolic pressure/diastolic pressure. Systole is when the ventricles of the heart contract, thus the pressure exerted is more and diastole is when the atria pump blood into the ventricles.

Discussion

32.	When measuring blood pressure by the auscultatory method A. The sounds that are heard are generated in the heart. B. The cuff pressure at which the first sounds are heard indicate systolic pressure. C. The cuff pressure at which the loudest sounds are heard indicate diastolic pressure. D. Systolic pressure estimations tend to be lower than those made by the palpatory method. E. Wider cuffs are required for larger arms.
Answer» A. False Korotkoff sounds are produced locally by the turbulence of blood being forced past the narrow segment of a partially occluded artery. B. True The sharp taps of Phase 1 are generated as the systolic pressure peaks force blood under the cuff. C. False Sudden muffling (Phase 4) or disappearance (Phase 5) of the sounds indicate the diastolic pressure point. D. False They are usually higher since palpation may fail to detect the first tiny pulses. E. True Otherwise the full cuff pressure may not be transmitted to the artery.

32.

When measuring blood pressure by the auscultatory method A. The sounds that are heard are generated in the heart. B. The cuff pressure at which the first sounds are heard indicate systolic pressure. C. The cuff pressure at which the loudest sounds are heard indicate diastolic pressure. D. Systolic pressure estimations tend to be lower than those made by the palpatory method. E. Wider cuffs are required for larger arms.

Answer»

A. False Korotkoff sounds are produced locally by the turbulence of blood being forced past the narrow segment of a partially occluded artery.

B. True The sharp taps of Phase 1 are generated as the systolic pressure peaks force blood under the cuff.

C. False Sudden muffling (Phase 4) or disappearance (Phase 5) of the sounds indicate the diastolic pressure point.

D. False They are usually higher since palpation may fail to detect the first tiny pulses.

E. True Otherwise the full cuff pressure may not be transmitted to the artery.

Discussion

33.	Which of the following is obtained as slag during the extraction of iron ? (A) CO (B) FeSiO3 (C) CaSiO3 (D) MgSiO3
Answer» Correct answer is (C) CaSiO₃

Discussion

34.	Which of the following is a neutral complex?A. `[Pt(NH_(3))_(2)Cl_(2)]`B. `[CO(NH_(3))_(6)]Cl_(3)`C. `[Ni(NH_(3))_(6)]Cl_(2)`D. `K_(4)[Fe(CN)_(6))]`
Answer» Correct Answer - A `[Pt(NH_(3))_(2)Cl_(2)]` carry no net charge hence it is neutral complex. `[Co(NH_(3))_(6)] ltimplies [Co(NH_(3))_(6)]^(3+) + 3Cl^(-)` `[Ni(NH_(3))_(6)]Cl_(2) ltimplies [Ni(NH_(3))_(6)]^(2+) + 2Cl^(-)` Cationic complexes. `underset("Anionic complex")(K_(4)Fe(CN_(6)) ltimplies 4K^(+) + [Fe(CN)_(6)]^(4-)`

Discussion

35.	Number of fatty acids in triglyceride is ………(a) 1 (b) 2 (c) 3 (d) 4
Answer» Number of fatty acids in triglyceride is 3.

Discussion

36.	The gas having lowest boiling point is –(A) Hydrogen (B) Helium (C) Nitrogen (D) Argon
Answer» Correct answer is (B) Helium

Discussion

37.	Which of the following doesn’t form hydrogen bond ? (A) NH3 (B) H2O (C) HCl (D) HF
Answer» Correct answer is (C) HCl

Discussion

38.	Oxygen and Ozone are – (A) Isobaric (B) Isomers (C) Allotropes (D) Isotopes
Answer» Correct answer is (C) Allotropes

Discussion

39.	Unit cell of a material is (a) Very larger than its crystal size (b) Equal to its crystal size (c) Smaller than its crystal size (d) Slightly larger than its crystal size
Answer» (c) Smaller than its crystal size

Discussion

40.	Which of the following is a dibasic acid ? (A) H3PO3 (B) H3PO2 (C) HPO2 (D) NH3
Answer» Correct answer is (A) H₃PO₃

Discussion

41.	Allotropes of a material must have (a) Same size (b) Same crystal structure (c) Same element(d) Same valence electron at outer shell
Answer» (c) Same element

Discussion

42.	Which one of the following statements is not true? (a) Natural rubber has the trans-configuration at every double bond (b) Buna-S is a copolymer of butadiene and styrene (c) Natural rubber is a 1, 4-polymer of isoprene (d) In vulcanization, the formation of sulphur bridges between different chains make rubber harder and stronger.
Answer» (a) Natural rubber has the trans-configuration at every double bond

Discussion

43.	Bakelite is a product of the reaction between (a) formaldehyde and NaOH (b) aniline and urea (c) phenol and methanal (d) phenol and chloroform
Answer» (c) phenol and methanal

Discussion

44.	An intermediate phase between isotropic liquids and crystalline solids is called a. Liquid crystals b. plasma c. gas d. vapour
Answer» a. Liquid crystals

Discussion

45.	The position of transition elements in Periodic Table is within – (A) s-block (B) p-block (C) d-block (D) None of these
Answer» Correct answer is (C) d-block

Discussion

46.	Bakelite is obtained from phenol by reacting with (a) HCHO (b) (CH2OH)2 (c) CH3CHO (d) CH3COCH3
Answer» The Correct option is (a) HCHO.

Discussion

47.	In general, strongest polymer group is ______(a) Thermoplasts (b) Thermosets (c) Elastomers (d) All polymers
Answer» In general, strongest polymer group is Thermosets

Discussion

48.	which one of the following is not an ore of zinc? a. zinc blendeb. calaminec. zincited. Bauxite
Answer» Option number (d) Bauxite..

Discussion

49.	Which of the following is a pair of transition elements ? (A) Na and Ca (B) Mg and Al (C) S and F (D) Cu and Fe
Answer» Correct answer is (D) Cu and Fe

Discussion

50.	Which polymers occur naturally? (a) Starch and Nylon (b) Starch and Cellulose (c) Proteins and Nylon (d) Proteins and PVC
Answer» (b) Starch and Cellulose

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Write the conditions to maximise the yield of `H_2SO_4` by contact process.

Mention three areas in which `H_2SO_4` plays an important role.

Which of the following is not counted as mold characteristics?(a) Possession of strength(b) Possession of refractoriness(c) Resist corrosion(d) Resist metal penetration in molds

How much percentage of water or moisture is contained by green sand cores?(a) 5%(b) 10%(c) 20%(d) 40%

Weak cores are reinforced using what?(a) Iron wires(b) Steel wires(c) Bronze wires(d) Cobalt wires

Which of the following equipment is used for both limited and mass production?(a) Core ovens(b) Dielectric bakers(c) Radiant bakers(d) Flame bakers

Cores are subjected to severe thermal and mechanical conditions.(a) Completely true(b) Partially true(c) Completely false(d) Partially false

The following figure represents what?(a) Strickle core box(b) Gang core box(c) Left and right hand core boxes(d) Loose piece core box

The moisture of the core is taken off during baking at what temperature?(a) 197°F(b) 212°F(c) 278°F(d) 304°F

The following figure represents which type of chaplet?(a) Radiator chaplet(b) Stem chaplet(c) Cast chaplet(d) Sheet metal chaplet

Which pattern operation is used for manufacturing wheel rims?(a) Follow board pattern(b) Segmental pattern(c) Sweep pattern(d) Gated pattern

Which of the following pattern operation is cheapest?(a) Sweep pattern(b) Gated pattern(c) Match plate pattern(d) Skeleton pattern

Distinguish between the meaning of the terms adsorption and absorption. Give one example of each.

Which of the following is shear thinning fluid?(a) Pseudoplastic(b) Dilatant(c) Rheopectic(d) Bingham plastic

“Thermal conversion of organic matter with an oxidant (normally oxygen) to produce primarily carbon dioxide and water”, which term is used for this process?(a) Oxidation(b) Pyrolysis(c) Combustion(d) Gasification

If the equation of a velocity profile over a plate is v = 5y^2 + y (where v is the velocity in m/s) determine the shear stress at y = 0. Given the viscosity of the liquid is 8.35 poise.(a) 0.830(b) 0.832(c) 0.835(d) 0.834

KMnO4 does not act as oxidising agent in the presence of HCl. Why?

A reaction is first order in A and second order in B. (i) Write the differential rate equation. (ii) How is the rate affected on increasing the concentration of B three times? (iii) How is the rate affected when the concentrations of both A and B are doubled?

Give reason why a finely divided substance is more effective as an adsorbent.

Calculate the pH of 0.04 M HNO3 Solution.

At 293 K, vapour pressure of pure benzene is 75mm of Hg and that of pure toluene is 22 mm of Hg. The vapour pressure of the solution which contains 20 mol% benzene and 80 mol % toluene isA. 32.6 mm HgB. 64.4 mm HgC. 97 mm HgD. 3.26 mm Hg

For infants, the pulse oximetry band is attached to their ______(a) arm(b) leg(c) palm(d) foot

What principle does pulse oximetry follow?(a) Law of Absorbance(b) Law of Reflection(c) Beer – Lambert Law(d) Law of Irradiance

The change that occurs in the eye to see the distant objects clearly isa. focal length of the eye lens decreasesb. curvature of the eye lens decreasesc. focal length of the eye lens increasesd. ciliary muscles of the eye contract.

The dye is inserted into the body with the help of _________(a) stent(b) syringe(c) catheter(d) endoscope

A typical ECG wave is _______(a) Periodic(b) A-periodic(c) Quasi – Periodic(d) Non – Periodic

The resistance of a conductor is 27. If it is cut into three equal parts and connected in parallel, then its total resistance isa. 6 Ωb. 3 Ωc. 9 Ωd 27 Ω

Bradycardia ECG will show what kind of wave?(a) The impulses have increased(b) The impulses have decreased(c) Pronounced P waves(d) Pronounced T waves

The most common placement of the leads from the Einthoven’s triangle is __________(a) Positive Left Arm and Negative Right Arm(b) Positive Left Leg and Negative Right Arm(c) Positive Left Leg and Negative Left Arm(d) Positive Right Arm and Negative Left Leg

In the differential auscultatory technique, where is the pressure sensor located?(a) In the middle of the cuff(b) In the upper portion of the cuff(c) In the lower portion of the cuff(d) Outside the cuff

What is the normal range of blood pressure?(a) 70/40 – 90/60(b) 90/60 – 120/80(c) 120/80 – 140/90(d) 140/90 – 190/100

Which of the following is obtained as slag during the extraction of iron ? (A) CO (B) FeSiO3 (C) CaSiO3 (D) MgSiO3

Which of the following is a neutral complex?A. `[Pt(NH_(3))_(2)Cl_(2)]`B. `[CO(NH_(3))_(6)]Cl_(3)`C. `[Ni(NH_(3))_(6)]Cl_(2)`D. `K_(4)[Fe(CN)_(6))]`

Number of fatty acids in triglyceride is ………(a) 1 (b) 2 (c) 3 (d) 4

The gas having lowest boiling point is –(A) Hydrogen (B) Helium (C) Nitrogen (D) Argon

Which of the following doesn’t form hydrogen bond ? (A) NH3 (B) H2O (C) HCl (D) HF

Oxygen and Ozone are – (A) Isobaric (B) Isomers (C) Allotropes (D) Isotopes

Unit cell of a material is (a) Very larger than its crystal size (b) Equal to its crystal size (c) Smaller than its crystal size (d) Slightly larger than its crystal size

Which of the following is a dibasic acid ? (A) H3PO3 (B) H3PO2 (C) HPO2 (D) NH3

Allotropes of a material must have (a) Same size (b) Same crystal structure (c) Same element(d) Same valence electron at outer shell

Bakelite is a product of the reaction between (a) formaldehyde and NaOH (b) aniline and urea (c) phenol and methanal (d) phenol and chloroform

An intermediate phase between isotropic liquids and crystalline solids is called a. Liquid crystals b. plasma c. gas d. vapour

The position of transition elements in Periodic Table is within – (A) s-block (B) p-block (C) d-block (D) None of these

Bakelite is obtained from phenol by reacting with (a) HCHO (b) (CH2OH)2 (c) CH3CHO (d) CH3COCH3

In general, strongest polymer group is ______(a) Thermoplasts (b) Thermosets (c) Elastomers (d) All polymers

which one of the following is not an ore of zinc? a. zinc blendeb. calaminec. zincited. Bauxite

Which of the following is a pair of transition elements ? (A) Na and Ca (B) Mg and Al (C) S and F (D) Cu and Fe

Which polymers occur naturally? (a) Starch and Nylon (b) Starch and Cellulose (c) Proteins and Nylon (d) Proteins and PVC