Consider the following chemicals :
1. Benzene     2. Carbon tetrachloride   3. Sodium carbonate 
4. Trichloroethylene 
Which of the above is/are used as dry cleaning chemicals? 

Which one of the following is another name of RDX ?

Consider the following statements 
1. Anhydrous sodium carbonate is commonly known as baking soda.
2. Baking soda is used in fire extinguishers.
3. Bleaching powder is manufactured in Hasenclever plant.
Which of the statements given above is/are correct ? 

Which are the materials generally employed as solder in soldering operation in electronics ?

Consider the following statements :
1. Baking soda is used in fire extinguishers.
2. Quicklime is used in the manufacture of glass.
3. Gypsum is used in the manufacture of Plaster of Paris.
Which of the statements given above is/are correct ? 

Consider the following statements:
The purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is 
1. To keep the washing powder dry.
2. To maintain the alkalinity of the powder.
Which of these statements is/are correct ? 

Standard 18-carat gold sold in the market contains 

Which one of the following statements is correct ?

Match List-I (Fuel Gases)  with List-II (Major Constituents) and select the correct answer using the codes given below the lists:
   List-I               List-II
A. CNG           1. Carbon monoxide, Hydrogen 
B. Coal gas      2. Butane, Propane 
C. LPG            3. Methane, Ethane 
D. Water gas    4. Hydrogen, Methane,Carbon monoxide 

Consider the following statements with reference to the Periodic Table of chemical elements:
1. Lonisation potential gradually decreases along a period.
2. In a group of elements,electron affinity decreases as the atomic weight         increases.
3. In a given period, electronegativity decreases as  the atomic number           increases.
Which of these statement(S) is/are correct ?