Chemistry, asked by princesingh44443, 2 months ago

CHEMISTRY

Q1 Fill in the blanks : -

(i) In a ________ reaction two or more substances combine to form a new single substance.

(ii) Unbalanced reactions are also known as _________.

(iii) Reactions in which heat is given out along with the products are called _________reactions.

(iv) Those reactions, in which two compounds react by an exchange of ions to form two new compounds, are

called ________ reactions.

(v) The digestion of food in the body is an example of ____________ reaction.

(vi) When calcium carbonate is heated, it decomposes to give___________ and _________.

Q2 True/ False : -

(i) A complete chemical equation represents the reactants, products and their physical states symbolically.

(ii) A magnesium ribbon burns with a dazzling flame in air (oxygen) and changes into a white substance,

magnesium oxide.

(iii) Rusting is a double decomposition reaction.

(iv) The reaction between nitrogen and hydrogen to give ammonia is an example of a combination reaction.

(v) Action of heat on ferrous sulphate is an example of decomposition reaction.

(vi) The number of atoms of each element is conserved in any chemical reaction.​

Answers

Answered by AMMOHAMMEDRABEEH
0

Answer:

Q 1.

(i) combination

(ii) skeletal reactions

(iii) Exothermic

(iv) Double displacement

(v) Decomposition

(vi) calcium oxide, carbon dioxide

Q 2.

(i) True

(ii) True

(iii) False (Iam not sure about it)

(iv) True

(v) True

(vi) True

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