61. Metal that remains in a liquid state above 35°C temperature is:
62. What is the Chemical symbol of Lead?
63. Hard steel contains
64. Match List I with List II.
List-I
List-II
a. Blue vitriol
1. Sodium bicarbonate
b. Epsom salt
2. Sodium hydroxide
c. Baking soda
3. Magnesium sulphate
d. Caustic soda
4. Copper sulphate
| List-I | List-II |
| a. Blue vitriol | 1. Sodium bicarbonate |
| b. Epsom salt | 2. Sodium hydroxide |
| c. Baking soda | 3. Magnesium sulphate |
| d. Caustic soda | 4. Copper sulphate |
65. German silver is an alloy of
66. Which is the most reactive metal?
67. What does lime make by reacting with chlorine?
68. Identify the liquid metal used in the thermometer.
69. Which of the following metal (shown by its symbol) is generally used for making filaments of bulb?
70. . . . . . . . . metal reacts intensely with cold water.
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