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प्रश्न
Select the correct answer from the choice in the bracket.
The positively charged particle of an atom.
विकल्प
electron
proton
neturon
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उत्तर
proton
APPEARS IN
संबंधित प्रश्न
Choose the most appropriate answer
A solvent of Iodine is
Tick the most appropriate answer
Solutions are
- heterogeneous mixtures.
- compounds
- homogeneous mixtures.
- elements
Fill in the blank
Chalk powder dissolved in water is an example of a Chalk powder dissolved in water is an example of a _________.
What is the difference between a pure substance and a mixture ?
What are the different types of mixtures ?
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Vinegar
Name: a Liquid Metal
Give reason: Graphite is used to make a lead of the pencils.
Tick (√) the correct alternative from the choice given for the following statement
A non-metal which is a good conductor of electricity.
Complete the statement – an element is a pure substance made up of ____________ atoms.
State what are radicals. Give the names of the radicals –
(a) NO3
(b) OH
(c) SO4
(d) CO3
Give the name of the radical - SO4
Select the correct answer from the choice given below.
The type of molecule- bromine
Select the correct answer from the choice given below.
The negatively charged particles in an atom
Who are my companions?
| Group 'A' | Group 'B' |
| 1. Stainless steel | (a) Non-metal |
| 2. Silver | (b) compound |
| 3. Bhajani mixture for milling | (c) Mixture |
| 4. Salt | (d) Element |
| 5. Coal | (e) Alloy |
| 6. Hydrogen | (f) Metal |
The diagram represents fractional distillation for the separation of mixtures. Answer the following :
- Can two immiscible liquids be separated by this process?
- Separation of liquids by this process is based on which physical property?
- If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
- Give a reason for the above answer.
- State the purpose of the fractionating column in the apparatus.
Give a reason for the following statement :
Brass & bronze are examples of mixtures, while copper sulphate & lead nitrate are examples of compounds.
Non-metal conducting electricity :______ :: Metal conducting electricity : Copper
Higher Order Thinking Skills.
List out the metals, non-metals and metalloids which you use in your house, schools. Compare their properties.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which is required for combustion.
