10th metal and non metal (20 min)
1. ductility is ?
A. making sheet of metal
B. making wire of metal
C. making sound of metal
D. non of the above
2. SODIUM ALUMINATE FORMULA IS
A. 2NaAlO2
B. NaAlo3
C. Na2Alo
D. Na2AlO
3. Process of forming thick oxide layer of alumunium is konwn as
A. aqua regia
B. anodising
C. corresion
D. oxidation
4. Aqua regia is 3: 1 of respective acids?
A. nitric acid and hydrochloric acid
B. concentrated hydrochloric acid and conentrated nitric acid
C. dilute hydrochloric acid and nitric acid
D. all of the above
5. corresion is
A. rusting of ore
B. ocidation of ore
C. reduction of ore
D. anodising of ore
6. DIFFRENCE between calcination and rosting?
A. calcination is done in presence of o2 while roating is done in abscence of o2
B. calcination and rosting is done in abscence of o2
C. calcination is done in abscence of o2 and rosting in presence of o2
D. both are done in presence of o2
7. Metal reacts with acid and forms:
A. salt and water
B. major as water and minor salt
C. metalacid
D. none of the above
8. ANODE CATHOD are respectively
A. + and - charge
B. - and + charge
C. + and neutral charge
D. neutral and- charge
Submit Test
⏱ Time Left