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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
The substance which accelerates the speed of a reaction without itself undergoing any change is called
विकल्प
catalyst
pollutant
fuel
none of the above
उत्तर
catalyst
APPEARS IN
संबंधित प्रश्न
Mention the contribution of the following scientists :
- Antoine Lavoisier
- Robert Boyle
- Joseph Priestley
- Sir W. Ramsay
Write the chemical name of Lime water
Give two uses of the following component present in air:
nitrogen
Tick (√) the correct alternative from the choice given for the following statement.
Respiration
Complete the statement given below by filling in the blank with the correct word/s from the word/s given below
____________ is an example of a pollutant present in the air.
Name a device which uses wind energy to generate electricity.
The process of conversion of iron into hydrated form of oxides is called _______.
Which of the following statements is incorrect?
In a number of musical instruments, air plays an important role. Can you name some such instruments?
In the boxes of Column, I the letters of some words got jumbled. Arrange them in proper form in the boxes given in Column II
| Column I | Column II | ||
| (a) | DILLMWIN | (a) | |
| (b) | YNOGXE | (b) | |
| (c) | MESKO | (c) | |
| (d) | TUDS | (d) | |
