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Assertion (A) : The metals and alloys are good conductors of electricity. Reason (R) : Bronze is an alloy of copper and tin and it is not a good conductor of electricity. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below : (a) Both (A) and (R) are true and (R) is correct explanation of the assertion. (b) Both (A) and (R) are true but (R) is not the correct explanation of the assertion. (c) (A) is true but (R) is false. (d) (A) is false but (R) is true.

(b) Both (A) and (R) are true but (R) is not the correct explanation of the assertion. Explanation The metals... View Article

Assertion (A) : Ethanoic acid is also known as glacial acetic acid. Reason (R) : The melting point of pure ethanoic acid is 290 K and hence it often freezes during winters in cold climates. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below : (a) Both (A) and (R) are true and (R) is correct explanation of the assertion. (b) Both (A) and (R) are true but (R) is not the correct explanation of the assertion. (c) (A) is true but (R) is false. (d) (A) is false but (R) is true.

(a) Both (A) and (R) are true and (R) is correct explanation of the assertion. Explanation Ethanoic acid is also... View Article

Identify ‘x’, ‘y’ and ‘z’ in the following reaction : 2 KClO3 (x) —- (y)—> 2 KCl (x) + O2 (z) (a) x = gas ; y = reaction condition, z = gas (b) x = solid ; y = liquid; z = gas (c) x = number of moles of KClO3 ; y = reaction condition; z = no. of molecules of oxygen. (d) x = physical state of KClO3 and KCl; y = reaction condition; z = physical state of O2 .

 (d) x =  physical  state  of  KClO3  and  KCl;  y  =  reaction  condition; z = physical state of O2. Explanation:   2KClO3(x)... View Article