Please select a subject first
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Define the following term:
Atom
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Milky way is a ________ galaxy.
Concept: undefined >> undefined
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Electron, proton, neutron are the types of ______ in an atom.
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Electron, proton, neutron are the types of ______ in an atom.
Concept: undefined >> undefined
The electron shell ______ is nearest to the nucleus.
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The electron shell ______ is nearest to the nucleus.
Concept: undefined >> undefined
Who is telling lies?
- Light year is used to measures time.
- End stage of a star depends on its initial mass.
- A star ends its life as a neutron star when the pressure of its electrons balances its gravity.
- Only light can emit from the black hole.
- The sun will pass through the supergiant stage during its evolution.
- The Sun will end its life as a white dwarf.
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Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Concept: undefined >> undefined
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Concept: undefined >> undefined
Deduce from the datum provided.
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number |
| \[\ce{_6^14C}\] | Mass number |
| \[\ce{_17^37 Cl}\] | Proton number |
Concept: undefined >> undefined
Deduce from the datum provided.
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number |
| \[\ce{_6^14C}\] | Mass number |
| \[\ce{_17^37 Cl}\] | Proton number |
Concept: undefined >> undefined
Identify the following solutions, whether they are acid or base.
| Solution | Change in Indicator | Acid/Base | ||
| Litmus | Phenolphthalein | Methyl orange | ||
| 1. | -- | No change | -- | |
| 2. | -- | -- | Orange colour turns red | |
| 3. | Red litmus turns blue | -- | -- | |
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Write the chemical name from the given formula.
H2SO4
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Sulphuric acid has the highest importance in the chemical industry. Why?
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Which acid is used for getting chloride salt?
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By squeezing lemon on a piece of rock the gas liberated turned lime water milky. which compound is present in the rock?
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The label on the bottle of chemical is spoiled. How will you find whether the chemical is acidic or not?
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Which are the industrial uses of acids?
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Main constituent of acid is ______.
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Tartaric acid is a ______ acid.
Concept: undefined >> undefined
