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5651.

Name two metallic properties other than malleability and sonorus nature. [2 MARKS]

Answer»

Name two metallic properties other than malleability and sonorus nature. [2 MARKS]

5652.

What is the meaning of combustion?

Answer»

What is the meaning of combustion?

5653.

Question 19 Why are bells made of metals?

Answer» Question 19
Why are bells made of metals?
5654.

Does light carry any mass?

Answer» Does light carry any mass?
5655.

Why fire need heat to light up as we can even light a fire in very cold climate?

Answer» Why fire need heat to light up as we can even light a fire in very cold climate?
5656.

A compound prepared by any method contains the same elements in the fixed ratio by mass. The given statement is known as:

Answer»

A compound prepared by any method contains the same elements in the fixed ratio by mass. The given statement is known as:


5657.

As we increase the temperature, the kinetic energy of the particles _________.

Answer»

As we increase the temperature, the kinetic energy of the particles _________.


5658.

Which of the following is/are not a heteroatomic molecule/s?

Answer»

Which of the following is/are not a heteroatomic molecule/s?


5659.

Who was the first to give the evidence for existence and movement of particles in liquid?

Answer»

Who was the first to give the evidence for existence and movement of particles in liquid?


5660.

Rayon is prepared by which of the following process?

Answer»

Rayon is prepared by which of the following process?


5661.

Question 2 (a) Fill in the blank: Burning of wood and coal causes ___of air.

Answer» Question 2 (a)
Fill in the blank:

Burning of wood and coal causes ___of air.
5662.

Untreated sewage contaminates Ganga because

Answer»

Untreated sewage contaminates Ganga because


5663.

Study the information given below: 1) Some substances are formed when two or more elements combined together chemically. 2) Properties of these substances are different from their respective constituents. 3) These substances cannot be broken down into their respective constituents by physical methods. Which of the following substance has the properties listed above?

Answer»

Study the information given below:

1) Some substances are formed when two or more elements combined together chemically.
2) Properties of these substances are different from their respective constituents.
3) These substances cannot be broken down into their respective constituents by physical methods.


Which of the following substance has the properties listed above?


5664.

Which of the following fuels has the highest calorific value ? Kerosene, Wood, Hydrogen, Cow-dung cakes, LPG

Answer»

Which of the following fuels has the highest calorific value ?

Kerosene, Wood, Hydrogen, Cow-dung cakes, LPG

5665.

What is the exception in Gallium?

Answer»

What is the exception in Gallium?

5666.

Of which gas the sun is made up of ?

Answer» Of which gas the sun is made up of ?
5667.

Is wood a substance which doesn't change its state from solid even if heated

Answer»

Is wood a substance which doesn't change its state from solid even if heated

5668.

In the introduction of the chapter metal and non-metals there is a subtopic called microscopic world. In the video they are talking about shells surrounding the protons. In my school I am being taught that that the third shell has a valency of 8 but in the video they are saying that the third shell has 18 valency. Please tell me the solution for the same. Thank you.

Answer»

In the introduction of the chapter metal and non-metals there is a subtopic called microscopic world. In the video they are talking about shells surrounding the protons. In my school I am being taught that that the third shell has a valency of 8 but in the video they are saying that the third shell has 18 valency. Please tell me the solution for the same. Thank you.

5669.

When blue crystals of substance 'A' is heated We get cracking sound and white anhydrous powder of substance 'B' is obtained . Identity A,B

Answer»

When blue crystals of substance 'A' is heated We get cracking sound and white anhydrous powder of substance 'B' is obtained . Identity A,B

5670.

A lake with an inflow of domestic sewage-rich in organic waste may result in

Answer»

A lake with an inflow of domestic sewage-rich in organic waste may result in


5671.

Rolling of chapatti is an example of physical change and baking of chapatti is an example of _______ change.

Answer»

Rolling of chapatti is an example of physical change and baking of chapatti is an example of _______ change.


5672.

Which of the following forms of energy can be harnessed from the sea?

Answer»

Which of the following forms of energy can be harnessed from the sea?


5673.

Ruthenford’s experiment on scattering of α - particles showed for the first time that the atom has

Answer» Ruthenford’s experiment on scattering of α - particles showed for the first time that the atom has
5674.

Hydrogen and oxygen both are combustible but their compound water is not.Why?

Answer» Hydrogen and oxygen both are combustible but their compound water is not.Why?
5675.

Imagine that you have created a solution of sugar and water in science class. Your teacher has asked you to retrieve the sugar in its dry state. Which plan of action below should you choose?

Answer»

Imagine that you have created a solution of sugar and water in science class. Your teacher has asked you to retrieve the sugar in its dry state. Which plan of action below should you choose?


5676.

Rohan asked for a glass of water from Sunil. He gave him a glass of cold water. Rohan observed some water droplets on the outer surface of the glass and asked Sunil the reason for this. Which of the below-mentioned will be Sunil's answer?

Answer»

Rohan asked for a glass of water from Sunil. He gave him a glass of cold water. Rohan observed some water droplets on the outer surface of the glass and asked Sunil the reason for this. Which of the below-mentioned will be Sunil's answer?


5677.

Which of the following statements is incorrect?

Answer»

Which of the following statements is incorrect?


5678.

What happens when iron fillings are added to dilute hydrochloric acid?

Answer»

What happens when iron fillings are added to dilute hydrochloric acid?


5679.

List of Gases having different smell

Answer»

List of Gases having different smell

5680.

What coefficient should be used to make the following equation balanced? N2+O2→xNO

Answer»

What coefficient should be used to make the following equation balanced?

N2+O2xNO


5681.

The colour of anhydrous copper sulphate is:

Answer»

The colour of anhydrous copper sulphate is:


5682.

The electrons present in the ultimate (last) shell of an atom are called as ___

Answer»

The electrons present in the ultimate (last) shell of an atom are called as ___


5683.

What is ingious temperature?

Answer» What is ingious temperature?
5684.

Difference between metalloids , metals and non metals .

Answer» Difference between metalloids , metals and non metals .
5685.

In case of uniform motion along a straight line, the distance travelled by a body is

Answer»

In case of uniform motion along a straight line, the distance travelled by a body is


5686.

An atom with 3 protons and 4 neutrons have a valency of ___.

Answer» An atom with 3 protons and 4 neutrons have a valency of ___.
5687.

Which is the most suitable metal for the preparation of Hydrogen through Laboratory method?

Answer»

Which is the most suitable metal for the preparation of Hydrogen through Laboratory method?


5688.

how many metals are present in an amalgam of Na

Answer» how many metals are present in an amalgam of Na
5689.

Is there a positive or a negative promoter which is added to the catalyst ?

Answer» Is there a positive or a negative promoter which is added to the catalyst ?
5690.

Why can't energy be created nor destroyed and only be conserved or transformed?

Answer» Why can't energy be created nor destroyed and only be conserved or transformed?
5691.

The Human Body contains examples of all three states of matter. Can you identify them ? Minimum 3 examples of each state Pls try to answer fast with correct answers....... Regards Mahima,

Answer»

The Human Body contains examples of all three states of matter. Can you identify them ?

Minimum 3 examples of each state

Pls try to answer fast with correct answers.......

Regards Mahima,

5692.

Write a note on sources of air pollution.

Answer»

Write a note on sources of air pollution.

5693.

why does iron pillar near Qutub minar in Dehi dosent get rusted in last peroid of 1600 years

Answer»

why does iron pillar near Qutub minar in Dehi dosent get rusted in last peroid of 1600 years

5694.

The correct increasing order of first ionisation energy is:

Answer»

The correct increasing order of first ionisation energy is:


5695.

Choose the hard solids from the following options which show some properties of metals and non-metals.

Answer»

Choose the hard solids from the following options which show some properties of metals and non-metals.


5696.

What are free electrons?

Answer» What are free electrons?
5697.

The aloe vera extract has almost __________ water compound which makes it ideal for moisturising ingredient.

Answer»

The aloe vera extract has almost __________ water compound which makes it ideal for moisturising ingredient.


5698.

Match the following: Petroleum ProductsUses1. Petrola.Paints and Road surfacing2. Paraffin waxb.Fuel for stove3. Kerosenec.Candels and vaseline4. LPGd.Fuel for vehicles5. Bitumene.Cooking cylinder

Answer»

Match the following:

Petroleum ProductsUses1. Petrola.Paints and Road surfacing2. Paraffin waxb.Fuel for stove3. Kerosenec.Candels and vaseline4. LPGd.Fuel for vehicles5. Bitumene.Cooking cylinder


5699.

How did JJ Thomson and Rutherford explain the stability and neutrality of an atom?

Answer» How did JJ Thomson and Rutherford explain the stability and neutrality of an atom?
5700.

Which of the following is/are true?

Answer»

Which of the following is/are true?