Question

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1. An acidic oxide is produced by the element:

(a) Na

(b) C

(c) Ca

(d) H


2. The least reactive metal among the following is

(a) Sodium

(b) Silver

(c) Copper

(d) Lead


3. The metals which can produce amphoteric oxides are

(a) Sodium and aluminium

(b) Zinc and potassium

(c) Calcium and sodium

(d) Aluminium and zinc


4. Which one of the following four metals would be displaced from the solution of its salt by the other three metals?

(a) Zn

(b) Ag

(c) Cu

(d) Mg


5. Which of the following non-metal is a liquid?

(a) Carbon

(b) Sulphur

(c) Bromine

(d) Iodine


6. 2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be

(a) Al

(b) Au

(c) Cu

(d) Pt


7. The atomic number of an element X is 19.The number of electrons in its ion X+ will be

(a) 18 (b) 19 (c) 20 (d) 21


8. The electrons present in the valence shell of a noble gas atom can be :

(a) 8 only

(b) 2 only

(c) 8 or 2

(d) 8 or 4


9. One of the following compounds is not ionic in nature .This compound is

(a) Lithium chloride

(b) Ammonium chloride

(c) Calcium chloride

(d) Carbon tetrachloride


10. Which of the following is an ore of mercury metal?

(a) Rock salt

(b) Cinnabar

(c) Calamine

(d) Haematite


11. Brass is an alloy of

(a) Cu and Zn

(b) Cu and Sn

(c) Cu and Pb

(d) Cu and Al


12. An electrolytic cell consists of

i. positively charged cathode

ii. negatively charged anode

iii. positively charged anode

iv. negatively charged cathode

(a) (i) and (ii)

(b) (iii) and (iv)

(c) (i) and (iii)

(d) (ii) and (iv)


13. Which among the following statements is incorrect for magnesium metal?

(a) It burns in oxygen with a dazzling white flame

(b) It reacts with cold water to form magnesium oxide and evolves hydrogen gas

(c) It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas.

(d) It reacts with steam to form magnesium hydroxide and evolves hydrogen gas


14. SO2

(a) turns dry blue litmus paper red

(b). turns moist blue litmus paper red

(c) turns moist red litmus paper blue

(d) none of these



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Answer 1

Answer:

1 .carbon

2.silver

3. d)

4. b)

5. bromine

6. au

7.18

8. 8 only

9. d)

10. b)

11. a)

12. c) d)

13. c)

14 .b)