Question

Ans. The flame becomes non-luminous.
Q. 6. What do you understand by striking back of a bunsen burner ?
Ans. When there is more air and less of gas, the flame travels down and starts burning near t
Q. 7. What action will you take if the burner strikes back?
Ans. Put off the burner, cool it under the tap water and light it again, keeping the air holes
Q. 8. What type of flame is required for general heating?
Ans. A non-luminous flame.
2.9. How will you reduce the height of the flame of a bunsen burner ?
Ans. By reducing the supply of the gas.
10. Which gas is used for burners in the laboratory?
ins. Liquefied Petroleum Gas.
11. Which chemical is used for cleaning the dirty apparatus in the laboratory?
ns. Chromic acid which is a mixture of potassium dichromate and conc. H2SO4
2. What is the use of a wash bottle?
ns. It is a convenient arrangement for taking the required quantity of water in the for​

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