Question
Which of the following gases in air is responsible for
the discoloration of Brass?Solution
Brass gets discolored in the air due to the presence of hydrogen sulphide. It is due to the presence of the mixture of hydrogen and sulphide that makes Brass discolored.
More Previous Year Paper Questions
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
?2 = √20.25 × 10 + √16 + 32
Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the given equation.
42 * 7 * 64 * 11 * 6 *4
276 ÷ 11.5 + 12 = ? x 3
? = 20% of 1200 + 256
?2 + 114 - 48 ÷ 2 × 5 = 163
Find the simplified value of the given expression:
7 of 9 ÷ 3 × 5² + √81 – 1448% of ? = 10176
35% of 500 × 22% of ? = 847
5(? + 2)Â =Â 3125Â
Relevant for Exams:
