Question

ICSE Class 10 chemistry important question​

Answer 1

A) Write the balanced chemical equation to support each of the statements given below (use only dilute sulphuric acid).

• Basic oxide + acid → salt + water
• Basic oxide + acid → salt + waterMetallic carbonate + acid → salt + water + carbon dioxide

B) Which element has the most metallic character?

C) The atomic number of Boron is 5. Write the chemical formula of the compound formed when Boron reacts with chlorine.

D) Give reason-

1)There are fumes in the air when the stopper of a bottle full of hydrogen chloride gas is opened.

1)There are fumes in the air when the stopper of a bottle full of hydrogen chloride gas is opened.2)Thick white fumes are formed when a glass rod dipped in NH4OH is brought near the mouth of a bottle full of HCl gas.

E) Mr Ramu wants to electroplate his keychain with nickel to prevent rusting. For this electroplating,

• Name the electrolyte
• Name the electrolyteName the cathode
• Name the electrolyteName the cathodeName the anode
• Name the electrolyteName the cathodeName the anodeGive the reaction at the cathode
• Name the electrolyteName the cathodeName the anodeGive the reaction at the cathodeGive the reaction at the anode

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