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प्रश्न
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)
A colourless solution of calcium hydroxide in a test tube turns ______ on blowing in it through a blow tube for some time.
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उत्तर
A colourless solution of calcium hydroxide in a test tube turns milky on blowing in it through a blow tube for some time.
संबंधित प्रश्न
What are (i) positive catalysts and (ii) negative catalysts? Support your answer with one example for each of them.
TRUE \ FALSE
Electrolytic refining is a method in which a thin coating of a metal is done over another metal.
Write true or false :
Hydrogen sulphide has rotten egg smell .
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)
Chlorine (Cl2) molecule is formed by ______ of electrons between two chlorine atoms.
What do you observe? When
Water is added to the quick lime.
Name affects the acidified K2Cr2O7 paper and also turns lime water dirty milky.
Explain the term ‘chemical reaction’ with special reference to – ‘reactants’ and ‘products’.
Select the correct answer for the following options:
The gas which reacts with oxygen to give a neutral liquid.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A coloured substance which leaves a black residue and evolves two gases one of which is acidic and coloured and the other neutral and colourless.
Classify the following as physical or chemical properties
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
