What is the use of a test tube holder?

Academic Chemistry NCERT Class 6

A test tube holder is used for holding a test tube in place or when the tube is hot and cannot be touched. Even it is used to hold test tubes while performing crucial chemical reactions as it prevents the effect of hazardous chemicals falling on the body and skin.

For example, a test tube holder is used to hold a test tube while heating it above the burner.

Tutorialspoint

Simply Easy Learning

Updated on: 10-Oct-2022

579 Views

Related Articles
What is the use of test() method in JavaScript?
To find the focal length of a concave mirror, Sita should choose which one of the followingA mirror holder and screen holder.A screen holder and a scale.A mirror holder, a screen holder and a scale.A screen, a mirror, holder for them and a scale.
What is the meaning of pollen tube?
Take three test-tubes. Fill each of them with water. Label them A, B and C. Keep a snail in test-tube A, a water plant in test-tube B and in C, keep snail and plant both. Which test-tube would have the highest concentration of CO2?
Take three test tubes. Fill 3/4th of each with water. Label them A, B, and C. Keep a snail in test tube A, a water plant in test tube B, and in C, keep the snail and plant both. Which test tube would have the highest concentration of CO2?
Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCL) is added to test tube A, while acetic acid (CH3COOH) is added to test tube B. Amount and concentration taken for both the acids are same. In which test tube will the fizzing occur more vigorously and why?
2 mL of ethanoic acid was taken in each of test-tube I and test-tube II. A red litmus paper was introduced in test-tube I and a pH paper was introduced in test-tube II. The experiment was performed by four students A, B, C and D, they reported their observations as given below :
You are provided with three test tubes A, B and C as shown in figure with different liquids. What will you observe when you put(a) a piece of blue litmus paper in each test tube(b) a piece of red litmus paper in each test tube(c) a few drops of phenolphthalein solution to each test tube?
When crystals of lead nitrate are heated strongly in a dry test tube(a)crystals immediately melt&(b) a brown residue is left(c) white fumes appear in the test tube(d) a yellow residue is left
What is capillary tube?
When dilute hydrochloric acid is added to granulated zinc placed in a test tube, the observation made is:
The correct procedure of heating iron-sulphur mixture to prepare iron sulphide is :(1) heat the powder mixture at the base of the test tube using a blue flame throughout.(2) heat the iron filings and sulphur mixture in the middle of the test tube using yellow flame throughout.(3) heat the powder mixture at the top of the test tube using an orange flame throughout.(4) heat the iron fillings-sulphur mixture at 3/4 quarters of the test tube using a red flame throughout.
What is a Test Scenario?
A student adds 4 ml of acetic to a test tube containing 4 ml of distilled water. He then shakes the test tube and leaves it to settle. After about 10 minutes he observes:(a) A layer of water over the layer of acetic acid. (b) A layer of acetic acid over the layer of water.(c)A precipitate settling at the bottom of the test tube.(d) A clear colourless solution.
Look at figure which shows solutions taken in test tubes A, B, C and D. What colour is expected when a piece of red litmus paper is dropped in each test tube? Nature of the solutions is given in the table for your help

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements