Match List I with List II and select the answer using the code given below the Lists: List I (Source) List II (Acid present) A. Tomato 1. Acetic acid B. Sour milk 2. Methanoic acid C. Ant sting 3. Oxalic acid D. Vinegar 4. Lactic acid Code A B C D (a) 3 2 4 1 (b) 3 4 2 1 (c) 1 2 4 3 (d) 1 4 2 3
A-3, B-4, C-2, D-1
Tomato contains oxalic acid, sour milk contains lactic acid, an ant sting contains methanoic (formic) acid, and vinegar contains acetic acid. This gives the pairing A-3, B-4, C-2, D-1, which matches option (b).
Which one of the following is used in soda-acid fire extinguishers?
Which one of the following gases is released mostly from landfills in urban areas?
Consider the following statements :
1. The temporary hardness in water is due to the presence of bicarbonates of calcium.
2. The permanent hardness in water is due to the presence of soluble chlorides and sulphates of calcium and magnesium.
3. The permanent hardness in water is removed by adding \(Na_2CO_3\) to water.
Which of the statements given above are correct ?
After a hot sunny day, people sprinkle water on the roof-top because:
Methyl Isocyanate gas, which was involved in the disaster in Bhopal in December 1984, was used in the Union Carbide factory for the production of:
‘German silver’ is used to make decorative articles, coinage metal, ornaments, etc. The name is given because:
Which one of the following sodium compounds is used for softening hard water?
Which of the following is a greenhouse gas?
I. Methane
II. Nitrous oxide
The gas which turns lime water milky is:
Liquefied Petroleum Gas (LPG) is mainly a mixture of:
Among the following, the conducting form of carbon is
Which of the following is NOT a Fossil Fuel?