31-When an acid reacts with metals it produces …………
(A) Salt and oxides
(B) Nitrogen and water
(C) Sodium and Hydrogen
(D) Salt and water
32- When metals carbonate and hydrogen carbonate reacts with acid to give
(A) Carbon dioxide
(B) Salt
(C) Salt, carbon dioxide and water
(D) Sodium and nitrogen
33- Reaction between an acid and a base to give salt and water is called ———
(A) Normal reaction
(B) Neutralization reaction
(C) Synthetic reaction
(D) None of the above
34- An acid reacts with metal oxide to form
(A) a salt and water
(B) a base
(C) oxygen
(D) hydrogen
35- The substances which are soapy to touch, bitter in taste and turns red litmus solution to blue are called
(A) Alkalies
(B) Acid
(C) Bases
(D) All of the above
36- All water soluble bases are called………………….
(A) Alkalies
(B) Metals
(C) Non Metallic
(D) Bases
37- What type of metals react with bases to form salt and hydrogen gas?
(A) Reactive metals
(B) Non reactive metals
(C) Non oxidants
(D) Oxidants
38- What is/are the example/s of reactive metals?
(A) Sodium
(B) Potassium
(C) Both A and B
(D) None of the above
39-When non metallic oxides which are acidic in nature react with base it forms..
(A) Potassium
(B) Sodium
(C) Water and salt
(D) None of the above
40-………….is used to measure the ions concentration in a solution from zero to 14.
(A) H scale
(B) Ph scale
(C) Acid scale
(D) pH scale
ANSWERS:
31-(D), 32-(C), 33-(B), 34-(A), 35-(C), 36-(A), 37-(A), 38-(C), 39-(C), 40-(D)