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प्रश्न
Select the correct answer for the following options:
The gas which reacts with oxygen to give a neutral liquid.
विकल्प
Hydrogen
Copper [II] oxide
Oxygen
Copper [II] hydroxide
Ammonia
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उत्तर
Ammonia
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संबंधित प्रश्न
The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder, it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change − A), then it burns (Change − B). The following statements pertain to these changes. Choose the correct one.
Fill in the blanK
A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
TRUE \ FALSE
A precipitation reaction takes place only in a solution.
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
To prevent rusting, a layer of ______ metal is applied on iron sheets.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
Oxygen is a ______ in respiration.
Explain by writing a word equation.
Limestone powder disappears on adding to dilute hydrochloric acids.
State the conditions necessary for a chemical change or reaction.
Give an example of a reaction where the following are involved
Catalyst
Write the chemical reaction where the following changes are observed.
Colour change is noticed
Name: Two nitrates that do not produce nitrogen dioxide on heating.
What do you observe when Cl2 is passed through potassium iodide (KI) solution.
Distinguish by heating the following in dry test tubs.
Ammonium Chloride and iodine.
Explain the Silver nitrate solution is kept in coloured reagent bottles in the laboratory.
State the following reaction represent oxidation or reduction.
\[\ce{Cu++->Cu}\]
Discuss how acid rain occurs due to emission of smoke from vehicles and industries?
Write some materials prepared by chemical changes.
Write word equations for two chemical reactions with the help of materials given in the box.
| Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water |
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think formation of rust from iron is a chemical change?
The chemical name of baking soda is sodium bicarbonate.
