52639 + Interview Questions in Secondary School in Chemistry

1.	Apparatus used for filtration is
Answer» Answer: Vacuum Filtration TECHNIQUE is most preferred for SMALL BATCH of solution in order to quickly dry out small crystals. This method requires a Büchner funnel, filter paper of smaller diameter than the funnel, Büchner flask, and rubber tubing to CONNECT to vacuum SOURCE.

1.

Apparatus used for filtration is

Answer»

Answer:

Vacuum Filtration TECHNIQUE is most preferred for SMALL BATCH of solution in order to quickly dry out small crystals. This method requires a Büchner funnel, filter paper of smaller diameter than the funnel, Büchner flask, and rubber tubing to CONNECT to vacuum SOURCE.

24.	Write a short note on potassium iodide?
Answer» POTASSIUM IODIDE is a chemical compound, MEDICATION, and dietary supplement. As a medication it is used to TREAT hyperthyroidism, in radiation emergencies, and to protect the thyroid GLAND when certain types of radiopharmaceuticals are used. ... Potassium iodide has the chemical formula KI.

34.	Define ductilty and write two example
Answer» Ductility is the physical property of a material associated with the ability to be hammered thin or stretched into wire WITHOUT breaking. A ductile substance can be DRAWN into a wire. EXAMPLES: Most metals are GOOD examples of ductile materials, including gold, SILVER, copper, erbium, terbium, and samarium.

36.	Define mandeleev's law
Answer» The law that the properties of the ELEMENTS are periodic functions of their ATOMIC numbers. Also called Mendeleev's law. (ORIGINALLY) the STATEMENT that the chemical and physical properties of the elements recur periodically when the elements are arranged in the ORDER of their atomic weights.

Explore topic-wise InterviewSolutions in Current Affairs.

Apparatus used for filtration is​

Answer this.only accurate ans.​

The word chemistry originated from the word. which mean. .​

1. write the difference between ordere andmolecularity of a reaction​

When is the atomic number of an atom equal to the number of electron ​

What is the standard state of carbon? Justify your answer.​

The best solute for lowering vapor pressure is one thatslightly solubleevaporates easilynonvolatile

8g of helium is equal to what? ​

How many moles of oxygen has in a 2000mL tank at 220C if the pressure is 1500 psi?

The freezing point of water will be lowered most by dissolving 1.0 mole ofnaphthaleneNaClMgCl2

Al++electronic vinya​

The freezing point of a solution is lowered by increasing the number of solute particles increasing the kinetic energy decreasing the number of solute particles

2. How many atoms of oxygen are present in (i) 4KMnO4 and(ii) Pb(NO3)2 ?​

Certain medicines and chemicals are stored in brown bottles. Explain the reason ​

What are isoelectronic species (ions)?Give examples. ​

A compound A having molecular formula C2H6O on treatment with PCL5 gives'B'. 'B' on treatment with KCN gives ethyl cyanide.. identify A​

Convert 2 chloropropane to 2,3- dimethylbutane(wurtz reaction)

What will happen to the entropy if a liquid crystallizes into a solid ? Give reason in support ofyour answer.​

8. Which river's bank did the people livealong in the ancient time(a) Satlaj (b) Amazon (c) Narmada​​

a) SATLAJ..........

Reaction between cao and silica​

What are the units of entropy.​

What are the limitations of sundial​

Write a short note on potassium iodide?​

choose the correct options 1. one twelfth of mass of an isotope of carbon atom 12C 6​

Nitration phenol by using catalyst nano2​

Write 8a group elements and which group elements are called rara group elements​

how it can be proved that the basic structure of morden periodic table is based on the electronic configuration of atoms of different elements?​

Plz16th plzzzzzzzzzzzzzzzz​

With the help of neat and well labelled diagram , write an experiment to show that a substance starts burning at its ignition temperature.

Calculate the amount of H2SO4 required for preparing 500ml of 0.05M and 0.05N?​

Q.2. The best reagent to obtain Pent-3-enal from Pent-3-enenitrile is *(a) SnCl2, HCl (b) DIBAI-H, H30+ (c) Na/ C2H5OH (d) Pt/Pd​

Amaan tm kaam bhi karte hou mujhe laga ki sirf duty karte hou

Define ductilty and write two example​

Give me answer...plz don't spam plz...​

Define mandeleev's law​

if the state anticipates any criminal activity from any person then as a precautionary measures that person can be detaines under which act??​

Liniments are added with........ to promote local action.​

which the following 0.1 M aqueous solution isblikely to have highest boiling point (a) Na2so4 (b) kcl (c) glucose (d) urea​

What is the heating effect on NO2?

Give one example for the following .a) A metal which is brittleb) A non metal which is good conductor of electricity .c) The hardest naturally occurring substance .d) The most ductile metal .e) A gaseous non metal.

The electrode potential of SHE is arbitrarily fixed as​

The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What is its atomic number and mass number?Plz answer it fast its very urgents. Who don't no answer plz don't answer​

(b) You are given an element 'X' with atomic number 16 and mass number 32u. (i) Calculate the sub-atomic particles.​

5.Find the total number of nucleons present in 12 g of 12C atoms.​

State Hess’s law of constant heat summation.​

What are the functions of Pharmaceutical council of India​

Can you recall some other examplesof conditioning? try to enlist at least fiveof them.​

Please solve this argent... chemistry​

The size of colloidal particles is in the range ofa) 0.1 - 1 nmb) 1 nm - 100 nm c) 100 nm – 1000 nmd) 1000 - 10000 nm​

The size of colloidal PARTICLES is in the range of:

Option (b) 1nm-100nm

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Apparatus used for filtration is

Answer this.only accurate ans.

The word chemistry originated from the word. which mean. .

1. write the difference between ordere andmolecularity of a reaction

When is the atomic number of an atom equal to the number of electron

What is the standard state of carbon? Justify your answer.

8g of helium is equal to what?

Al++electronic vinya

2. How many atoms of oxygen are present in (i) 4KMnO4 and(ii) Pb(NO3)2 ?

Certain medicines and chemicals are stored in brown bottles. Explain the reason

What are isoelectronic species (ions)?Give examples.

A compound A having molecular formula C2H6O on treatment with PCL5 gives'B'. 'B' on treatment with KCN gives ethyl cyanide.. identify A

What will happen to the entropy if a liquid crystallizes into a solid ? Give reason in support ofyour answer.

8. Which river's bank did the people livealong in the ancient time(a) Satlaj (b) Amazon (c) Narmada

Reaction between cao and silica

What are the units of entropy.

What are the limitations of sundial

Write a short note on potassium iodide?

choose the correct options 1. one twelfth of mass of an isotope of carbon atom 12C 6

Nitration phenol by using catalyst nano2

Write 8a group elements and which group elements are called rara group elements

how it can be proved that the basic structure of morden periodic table is based on the electronic configuration of atoms of different elements?

Plz16th plzzzzzzzzzzzzzzzz

Calculate the amount of H2SO4 required for preparing 500ml of 0.05M and 0.05N?

Q.2. The best reagent to obtain Pent-3-enal from Pent-3-enenitrile is *(a) SnCl2, HCl (b) DIBAI-H, H30+ (c) Na/ C2H5OH (d) Pt/Pd

Define ductilty and write two example

Give me answer...plz don't spam plz...

Define mandeleev's law

if the state anticipates any criminal activity from any person then as a precautionary measures that person can be detaines under which act??

Liniments are added with........ to promote local action.

which the following 0.1 M aqueous solution isblikely to have highest boiling point (a) Na2so4 (b) kcl (c) glucose (d) urea

The electrode potential of SHE is arbitrarily fixed as

The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What is its atomic number and mass number?Plz answer it fast its very urgents. Who don't no answer plz don't answer

(b) You are given an element 'X' with atomic number 16 and mass number 32u. (i) Calculate the sub-atomic particles.

5.Find the total number of nucleons present in 12 g of 12C atoms.

State Hess’s law of constant heat summation.

What are the functions of Pharmaceutical council of India

Can you recall some other examplesof conditioning? try to enlist at least fiveof them.

Please solve this argent... chemistry

The size of colloidal particles is in the range ofa) 0.1 - 1 nmb) 1 nm - 100 nm c) 100 nm – 1000 nmd) 1000 - 10000 nm