Question
Which of the following metals does not liberate hydrogen
gas when reacted with cold water but does so with steam?Solution
Magnesium reacts very slowly with cold water, and the reaction may not be observable at room temperature. However, when heated with steam, magnesium reacts more vigorously, forming magnesium oxide (MgO) and hydrogen gas (H ₂ ). Reaction with steam: Mg (s) + H ₂ O (g) → MgO (s) + H ₂ (g)
Select the option that is related to first number in the same way third number is related to fourth number.
45: ? :: 58: 377
Select the option that is related to fourth number in the same way as the first number is related to the second number and the fifth number is related t...
Select the option that is related to the third number in the same way as the second number is related to first number and the sixth number is related to...
Careful is to cautious as boastful is to:
Awful : Terrible :: Descent : ?
Select the combination of numbers that when placed sequentially in the blanks of the given series will complete the series.
6 1 _ 9 _ 5 7 6 _ _ 9...
Given set: [15, 117, 51]
Select the option that is related to fourth number in the same way as the first number is related to the second number and the fifth number is related t...
Select the option that is related to fifth term in the same way as the second term is related to the first term and the fourth term is related to the t...
Select the option that is related to the third number in the same way as the second number is related to first number and the sixth number is related t...
