Question

(i) Mark (/) the correct answer in the following:
1. ZnSO4.7H20, white vitriol is a
o (a) salt
(b) hydrated salt
(c) acid
(d) base
2. How many replaceable hydrogen atoms are present in dibasic acid?
(a) One
(b) Two
(c) Three
(d) Four

3. The metal which forms insoluble chloride and sulphate is
(a) Silver
(b) Sodium
(c) Copper
(d) Calcium

4. The king of chemical is
(a) HNO3 0 (b) HCI
(c) H3PO4
(d) H2SO4

5. Many solid salts absorb moisture from atmosphere and get wet. This property is called
(a) hygroscopic D (b) deliquescence (c) dehydration
(d) efflorescence

6. Indigestion is treated by which of the following type of medicine ?
(a) Antiseptic
(b) Antacid
(c) Analgesic
O (d) Antibiotic

7. Which of the following is alkali?
o(a) Ca(OH)2
(b) Mg(OH)2
0 (c) Al(OH)3
(d) NaOH

8. An element 'X' forms a gaseous oxide which dissolve in water and its solution give pungent smell and
solution turns blue litmus to red. The element 'X' could be
(a) Sodium
(b) Sulphur
(c) Copper
(d) Iron

9.Which of the following base will decompose on heating?
(a) KOH
(b) NaOH
(c) KOH and NaOH both
(d) Mg(OH)2

10. Smelling salt is
(a) NHACI
(b) (NH4)2S04
(d) (NH4)2CO3
(c) NH4NO3​

Answer 1

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