Question

4. Zinc metal is added to the solutions of (1) HCI (ii) NaCl (iii) NaOH and (iv) CuSo Hydrogen
gas is liberated in solutions
[ ]
A) i, ili
B) i, iv
C) i, ii
D) ii, iii
5. Baking powder is a mixture of NaHCO, and
A) citric acid
B) vinegor C) tautorric acid D) acetic acid 16
6. Keeping the potential difference constant, the resistance of a circuit is halved. The current will
become
A) halved
B) one fourth
C) double
D) No change​

Answer 1

Answer:

omg is that ur real dp? i will get heart attack after seeing...ur looking lika a clown...lol