English Medium कक्षा ९ - CBSE Question Bank Solutions for Science

The element which is not common between the compounds called baking soda and soda ash is

The element which is not common between the compounds called baking soda and soda ash is

“Is malleable and ductile” best describes :

“Is malleable and ductile” best describes :

Which one of the following is not a metalloid ?

Which one of the following is not a metalloid ?

The elements which normally exist in the liquid state are :

The elements which normally exist in the liquid state are :

The property/properties which enable copper metal to be used for making electric wires is/are :

The property/properties which enable copper metal to be used for making electric wires is/are :

On the basis of composition of matter, milk is considered to be :

On the basis of composition of matter, milk is considered to be :

Which of the following statements are true for pure substances ?

1. pure substances contain only one kind of particles
2. pure substances may be compounds or mixtures
3. pure substances have the same composition throughout
4. pure substances can be exemplified by all elements other than nickel

Which of the following statements are true for pure substances ?

1. pure substances contain only one kind of particles
2. pure substances may be compounds or mixtures
3. pure substances have the same composition throughout
4. pure substances can be exemplified by all elements other than nickel

Which of the following does not have a fixed melting point/boiling point ?

Which of the following does not have a fixed melting point/boiling point ?

In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :

Hydrogen, Oxygen, Steam, Chlorine

In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :

Hydrogen, Oxygen, Steam, Chlorine

Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.

1. What type of substance is B ?
2. What type of substance is C ?
3. Name the gas (i) D, and (ii) E ?
4. State one characteristic property of gas D.
5. Write one test to identify gas E.

Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.

1. What type of substance is B ?
2. What type of substance is C ?
3. Name the gas (i) D, and (ii) E ?
4. State one characteristic property of gas D.
5. Write one test to identify gas E.