IIT JEE Coaching

IIT JEE Coaching

+ Follow 9,696 Followers

Share

Showing 151 to 175 of 379
Sort By: 
R

Rakshada 01/06/2016 in  IIT JEE Coaching classes

An important application of interference in thin films is the formation of -------------- rings.

0 0

Answer

You can add upto 6 Images

D

Debasish 01/06/2016 in  IIT JEE Coaching classes

The radius of the nth dark ring equation is ------------.

0 0

Answer

You can add upto 6 Images

P

Pankaj 01/06/2016 in  IIT JEE Coaching classes

The amount of bending in diffraction depends on the --------------

0 0

Answer

You can add upto 6 Images

R

Raveena 01/06/2016 in  IIT JEE Coaching classes

In Fresnel diffraction, the incident wavefront is either -------------------.

0 0

Answer

You can add upto 6 Images

G

Geetanjali 01/06/2016 in  IIT JEE Coaching classes

Using spectrometer, ------------------ diffraction can be observed.

0 0

Answer

You can add upto 6 Images

V

Vikas 01/06/2016 in  IIT JEE Coaching classes

The combined width of a slit and a ruling is called -----------------

0 0

Answer

You can add upto 6 Images

M

Manish 01/06/2016 in  IIT JEE Coaching classes

In a plane diffraction grating, ? = ------------

0 0

Answer

You can add upto 6 Images

R

Ravi 01/06/2016 in  IIT JEE Coaching classes

The phenomenon of ---------------- proves that light waves are transverse.

0 0

Answer

You can add upto 6 Images

K

Kamal 01/06/2016 in  IIT JEE Coaching classes

The plane perpendicular to the plane of vibration is called plane of -----------------

0 0

Answer

You can add upto 6 Images

A

Avinash 01/06/2016 in  IIT JEE Coaching classes

A device that produces a plane ------------- light is called polariser.

0 0

Answer

You can add upto 6 Images

J

Jagabandhu 01/06/2016 in  IIT JEE Coaching classes

The angle of incidence at which the reflected beam is completely plane polarised is angle of ----

0 0

Answer

You can add upto 6 Images

A

Amit 01/06/2016 in  IIT JEE Coaching classes

The equation for Brewster’s law is ? = ----------------

0 0

Answer

You can add upto 6 Images

A

Abdul 01/06/2016 in  IIT JEE Coaching classes

The polarising angle for glass is -------------------

0 0

Answer

You can add upto 6 Images

A

Aravind 01/06/2016 in  IIT JEE Coaching classes

The pile of plates uses the polarisation by ---------------- phenomenon. 45. The double refraction phenomenon was discovered by ------------------

0 0

Answer

You can add upto 6 Images

D

Devi 01/06/2016 in  IIT JEE Coaching classes

Crystals like mica, topaz etc. having two optic axes are called ------------------

0 0

Answer

You can add upto 6 Images

A

Altaf 01/06/2016 in  IIT JEE Coaching classes

The refractive index for Canada balsam cement is -------------- for both the rays.

0 0

Answer

You can add upto 6 Images

M

Manjunath 01/06/2016 in  IIT JEE Coaching classes

H polaroids use a thin film of ----------------

0 0

Answer

You can add upto 6 Images

A

Akshay 01/06/2016 in  IIT JEE Coaching classes

Polaroids are used as ----------------------- glasses

0 0

Answer

You can add upto 6 Images

A

Aksabanu 01/06/2016 in  IIT JEE Coaching classes

In an EM wave, the angle between the electric and the magnetic field vectors are at ------------.

0 0

Answer

You can add upto 6 Images

S

Sanjay 20/05/2016 in  IIT JEE Coaching classes

Show previous answers

Swagata replied | 29/05/2016

a mixture of dyes that changes colour gradually over a range of pH and is used (especially as indicator paper) in testing for acids and alkalis.

0 0

Oasis Gurgaon replied | 29/05/2016

A universal indicator is a solution which undergoes several color changes over a wide range of pH's. The color is used to "indicate" pH directly. Universal indicators are usually mixtures of several indicators.

0 0

Answer

You can add upto 6 Images

M

Maheshwari 20/05/2016 in  IIT JEE Coaching classes

What is methyl orange? How is it made?

1 0 3

Show previous answers

Kamal replied | 21/05/2016

Methyl orange is a pH indicator frequently used in titrations because of its clear and distinct colour change. Because it changes colour at the pH of a midstrength acid, it is usually used in titrations for acids.

0 0

Swagata replied | 29/05/2016

Methyl orange is an intensely colored compound used in dyeing and printing textiles. It is also known as C.I. Acid Orange 52, C.I. 13025, helianthine B, Orange III, Gold orange, and Tropaeolin D . Chemists use methyl orange as an indicator in the titration of weak bases with strong acids.

0 0

Answer

You can add upto 6 Images

S

Soumya 20/05/2016 in  IIT JEE Coaching classes

What are some natural acid/base indicators?

1 0 3

Show previous answers

Nimesh replied | 24/05/2016

Many flowers,fruits,vegtables are natural indicators. One such example is rose anthocyanins.

0 0

Swagata replied | 29/05/2016

Many flowers, fruits and vegetables contain chemical substances that change color in solutions of different pH. acid or base natural indicator, such as hibiscus, turmeric, red cabbage, and some other kinds of plants. Many indicators have been extracted from plants.

0 0

Answer

You can add upto 6 Images

H

Hima 20/05/2016 in  IIT JEE Coaching classes

What household substances can be used as acid/base indicators?

1 0

Jayasimha replied | 20/05/2016

Carrots
Cherries and cherry juice is bright red in acidic solution but purple to blue in basic solution.
Cranberries
Curry powder and tumeric are spices that contain a bright yellow pigment called curcumin (which is not an anthocyanin). It turns from yellow at pH 7.4 to red at pH 8.6.
Delphinium petals contain an anthocyanin called delphinin, which changes from...  more»
Carrots
Cherries and cherry juice is bright red in acidic solution but purple to blue in basic solution.
Cranberries
Curry powder and tumeric are spices that contain a bright yellow pigment called curcumin (which is not an anthocyanin). It turns from yellow at pH 7.4 to red at pH 8.6.
Delphinium petals contain an anthocyanin called delphinin, which changes from bluish red in acid to blue to violet in basic solution.
Red cabbage contains a mixture of anthocyanins and other pigments that indicate a wide range of pH. The photograph at right shows how red cabbage juice changes from deep red at pH 1 to purple at pH 7 to to green at pH 12. At higher pH (13-14) it turns yellow.
Red radish
Rhubarb
Rose petals contain the oxonium salt of cyanin, and they turn blue in basic solution. (The potassium or calcium salt of the same pigment makes cornflowers blue!)
Strawberries
Tea «less

0 0

Swagata replied | 29/05/2016

Here's a partial list of house and garden materials that can be used as acid/base indicators. Notice that most of the materials are derived from plants. Almost any flower, fruit, or plant part that is red, blue, or purple contains a class of chemical compounds called anthocyanins that change color with pH.

0 0

Answer

You can add upto 6 Images

B

Boyina.bala 20/05/2016 in  IIT JEE Coaching classes

What are some novel ways to use indicators (besides titrations)?

1 0

Jayasimha replied | 20/05/2016

Mood lipstick. Acid-base indicators in the cosmetics change color on application due to skin pH.
Turning "water" to "wine". Add phenolpthalein to a clear dilute NaOH solution.)
Making real wines red. Red wines contain anthocyanins, which are pH indicators. Adjusting the pH of the wine changes its color (and its taste). Welch's grape juice works, too.
Disappearing...  more»
Mood lipstick. Acid-base indicators in the cosmetics change color on application due to skin pH.
Turning "water" to "wine". Add phenolpthalein to a clear dilute NaOH solution.)
Making real wines red. Red wines contain anthocyanins, which are pH indicators. Adjusting the pH of the wine changes its color (and its taste). Welch's grape juice works, too.
Disappearing ink and invisible ink Write a message in colorless phenolthalein. Spray the paper with a dilute NaOH solution and the letters appear in pink.
Demonstrating how an ion exchange column works (see the July 1996 issue of the Journal of Chemical Education for more).
Food coloring
Monitoring swimming pool pH. «less

0 0

Swagata replied | 29/05/2016

Mood lipstick. Acid-base indicators in the cosmetics change color on application due to skin pH.
Turning "water" to "wine". Add phenolpthalein to a clear dilute NaOH solution.)
Making real wines red. Red wines contain anthocyanins, which are pH indicators. Adjusting the pH of the wine changes its color (and its taste). Welch's grape juice works, too.
Disappearing...  more»
Mood lipstick. Acid-base indicators in the cosmetics change color on application due to skin pH.
Turning "water" to "wine". Add phenolpthalein to a clear dilute NaOH solution.)
Making real wines red. Red wines contain anthocyanins, which are pH indicators. Adjusting the pH of the wine changes its color (and its taste). Welch's grape juice works, too.
Disappearing ink and invisible ink Write a message in colorless phenolthalein. Spray the paper with a dilute NaOH solution and the letters appear in pink.
Demonstrating how an ion exchange column works (see the July 1996 issue of the Journal of Chemical Education for more).
Food coloring
Monitoring swimming pool pH.
Soil pH kits.
Demonstrating the electrolysis of water
Making a "voice activated" chemical reaction. (a solution of phenol red in very slightly alkaline water will turn from red to yellow, if you talk to it for a while :) Carbon dioxide from your breath neutralizes the solution and causes the color change. «less

0 0

Answer

You can add upto 6 Images

L

Laxmi 19/05/2016 in  IIT JEE Coaching classes

Why is atomic number called "Z"? Why is mass number called "A"?

1 1 3

Show previous answers

Nakshatratuitions And replied | 25/05/2016

Index and bases so

0 0

Swagata replied | 29/05/2016

"Atomic number" in German is "Atomzahl", so the Z symbol for atomic number probably comes from "Zahl" (number).

0 0

Answer

You can add upto 6 Images

Previous1..234567891011..16Next

Have a Question?

Thousands of expert tutors are available to answer your question

Looking for IIT JEE Coaching classes?

Find best IIT JEE Coaching classes in your locality on UrbanPro.

FIND NOW

Do you offer IIT JEE Coaching classes?

Create Free Profile Now »

Top Contributors

Gyan Sagar

105 Answers

Career Group

98 Answers

Delhi Career Academy

92 Answers

Gaurva

63 Answers

U.k.

55 Answers

Delhi Career

51 Answers

Akon

36 Answers

Sapna

27 Answers

K.v.sagar

25 Answers

Sponsored

About UrbanPro

UrbanPro.com helps you to connect with the best IIT JEE Coaching classes in India. Post Your Requirement today and get connected.

Find Best IIT JEE Coaching classes?

Find Now »